Module 11B – Piston Aeroplane Aerodynamics, Structures and Systems – Aeropeep

Module 11B - Piston Aeroplane Aerodynamics,
Structures and Systems

11B.06. Electrical Power (ATA 24).

Question Number. 1. A leadacid battery is considered to be fully charged when the.

Option A. cells begin to gas freely.

Option B. SG and voltage remain constant for specified period.

Option C. SG reaches 1.180.

Correct Answer is. SG and voltage remain constant for specified period.

Explanation. EEL/11 4.4.8 and Pallett Aircraft Electrical Systems 3rd Edition Page 23.

Question Number.		2.	The preferred method of battery charging a NiCad battery is
constant.
Option A.	voltage.
Option B.	current.
Option C.	power.
Correct Answer is.		current.
Explanation.	CAIPs EEL/15 Para 4.1.
Question Number.		3.	When a current transformer is disconnected, what should be done?.

Option A. Terminals shorted.

Option B. Resistor placed across terminals.

Option C. Left open circuit.

Correct Answer is. Terminals shorted.

Explanation. Pallett Aircraft Electrical Systems 3rd Edition Page 61.

Question Number.		4.	What does the differential sensing coil sense?.
Option A.	Power.
Option B.	Volts.
Option C.	Current.
Correct Answer is.		Current.
Explanation.	NIL.
Question Number.		5.	Where does the GCU gets its power?.
Option A.	RAT.
Option B.	Battery.
Option C.	PMG.
Correct Answer is.		PMG.

Explanation. Jeppesen A&P Technician Airframe Textbook Page 724. PMG is main supply for GCU, battery is back up power for GCU.

Question Number. 6. Galley loads are wired in.

Option A. parallel so load shedding will lower current consumption.

Option B. either series or parallel depending on the design.

Option C. series.

Correct Answer is parallel so load shedding will lower current consumption.

Explanation. All loads on an aircraft are wired in parallel.

Question Number.		7.	A fusetype current limiter.
Option A.	can be used as a radio suppressor.
Option B.	limits current flow to a load.
Option C.	opens a circuit after a time/current condition has been exceeded.
Correct Answer is.		opens a circuit after a time/current condition has been exceeded.
Explanation.	See Pallett Aircraft Electrical Systems 3rd Edition Page 112, or, Aircraft

Electricity and Electronics, Eismin Page 99. However, another type of current limiter holds the current but does and open the circuit see Aircraft Electricity and Electronics Eismin Page 202.

Question Number.		8.	When a load is shed from a busbar, the.
Option A.	busbar voltage decreases.
Option B.	current consumption from the bar decreases.
Option C.	busbar voltage increases.
Correct Answer is.		current consumption from the bar decreases.
Explanation.	Aircraft Electricity and Electronics, Eismin, Page 241. Load shedding reduces
current consumption.
Question Number.		9.	In unparalleled AC generation systems, the phase rotation of one
generator in relation to the others.
Option A.	must be synchronised prior to paralleling.
Option B.	is unimportant.
Option C.	must be BCA.
Correct Answer is.		is unimportant.
Explanation.	Phase relationship is unimportant in an unparalleled system (although answer b
says it will be paralleled, thereby changing the question???).
Question Number.		10.	In a multigenerator system, the generator which takes more than
its reactive power share is protected by.
Option A.	overvoltage and undervoltage protection circuits.
Option B.	overcurrent and undercurrent protection circuits.
Option C.	overexcitation and underexcitation protection circuits.
Correct Answer is.		overvoltage and undervoltage protection circuits.
Explanation.	Pallett Aircraft Electrical Systems 3rd Edition Page 49.
Question Number.		11.	Sharing of electrical loads by paralleled DC generators is
controlled by.

Option A. equalising circuits which control the field excitation of the generators.

Option B. automatic load shedding.

Option C. equalising circuits which control the speed of the generators.

Correct Answer is. equalising circuits which control the field excitation of the generators. Explanation. Changing the speed would also change the frequency and thus the phase

relationship. Generators are always controlled by adjusting the field strength.

Question Number.		12.	Excessive commutator sparking can be caused by.
Option A.	rotating field diode failure.
Option B.	brushes positioned on MNA.
Option C.	weak spring tension.
Correct Answer is.		weak spring tension.
Explanation.	Weak spring tension of the brushes can cause excessive sparking.
Question Number.		13.	Before checking the SG of a battery recently removed from an
aircraft.
Option A.	take the temperature of the electrolyte.
Option B.	carry out a capacity test.
Option C.	allow to stabilise for one hour.
Correct Answer is.		take the temperature of the electrolyte.
Explanation.	CAIPs EEL/11.
Question Number.		14.	On an AC external power plug, the interlock circuit is controlled
by pins.
Option A.	AB.
Option B.	CD.
Option C.	EF.
Correct Answer is.		EF.
Explanation.	Pallett Aircraft Electrical Systems 3rd Edition Page 72.
Question Number.		15.	Overvoltage protection circuits are activated.
Option A.	before the over voltage limit is exceeded.
Option B.	after a fixed time delay.
Option C.	dependent on the magnitude of the overvoltage.
Correct Answer is.		dependent on the magnitude of the overvoltage.
Explanation.	Pallett Aircraft Electrical Systems 3rd Edition Page 119.
Question Number.		16.	A diode connected across a coil will.
Option A.	suppress arching when relay is opening and closing.
Option B.	prevent back EMF and allow faster switching.
Option C.	prevent the coil being fitted the wrong way.
Correct Answer is.		prevent back EMF and allow faster switching.
Explanation.	NIL.	http://homepages.which.net/~paul.hills/Solenoids/SolenoidsBody.html
Question Number.		17.	Which fault does not always trip the GCR?.
Option A.	Underfrequency and undervolts.
Option B.	Overfrequency and overvolts.
Option C.	Overfrequency and underfrequency.
Correct Answer is.		Overfrequency and underfrequency.
Explanation.	A and b are both wrong because under and over voltage will both trip the relay.

On some aircraft, under frequency will NOT trip the relay, so c is the ‘least incorrect’.

Question Number.		18.	Differential protection in a generating system.
Option A.	detects current difference between source and load.
Option B.	detects voltage difference between source and load.
Option C.	uses the volts coil to trip the GCR.
Correct Answer is.		detects current difference between source and load.
Explanation.	Pallett Aircraft Electrical Systems 3rd Edition Page 121.
Question Number.		19.	Open phase sensing on a current transformer.
Option A.	is detected on generator neutral circuit.
Option B.	is detected using all phases.
Option C.	is detected using any phase.
Correct Answer is.		is detected on generator neutral circuit.
Explanation.	Pallett Aircraft Electrical Systems 3rd Edition Page 121, & B737 Manual.
Question Number.		20.	If the battery is switched off in flight, the.
Option A.	captain’s instruments will be powered from the standby bus.
Option B.	battery is disconnected from bus.
Option C.	generator voltage falls to zero.
Correct Answer is.		battery is disconnected from bus.
Explanation.	Pallett Aircraft Electrical Systems 3rd Edition Page 4.
Question Number.		21.	To flash a generator field the.
Option A.	generator is on line and producing a voltage less than the flashing voltage.
Option B.	generator rotates but is not on line.
Option C.	generator must be stationary.
Correct Answer is.		generator must be stationary.
Explanation.	Pallett Aircraft Electrical Systems 3rd Edition Page 4.
Question Number.		22.	Voltage is controlled by.
Option A.	the constant speed drive.
Option B.	the voltage regulator.
Option C.	the swashplate.
Correct Answer is.		the voltage regulator.
Explanation.	The voltage is controlled by the voltage regulator.
Question Number.		23.	The ground interlock pins are numbered.
Option A.	A and B.
Option B.	C and N.
Option C.	E and F.
Correct Answer is.		E and F.
Explanation.	Pallett Aircraft Electrical Systems 3rd Edition Page 72.

Question Number.		24.	Distilled water should be added to a nicad battery.
Option A.	only in the battery workshop.
Option B.	at any time.
Option C.	when fully charged.
Correct Answer is.		only in the battery workshop.
Explanation.	CAIP EEL/13 para 4.
Question Number.		25.	Overflowing electrolyte in a nicad battery indicates.
Option A.	not enough charging current.
Option B.	excessive charging current.
Option C.	low electrolyte temperature.
Correct Answer is.		excessive charging current.
Explanation.	Jeppesen A&P Airframe Technician Page 731, 732.
Question Number.		26.	During a normal engine shutdown, generator tripping is initiated
by.
Option A.	undervoltage.
Option B.	underfrequency.
Option C.	overcurrent.
Correct Answer is.		undervoltage.
Explanation.	Pallett Aircraft Electrical Systems 3rd Edition Page 120.
Question Number.		27.	What would you use to neutralise nicad battery spillage?.
Option A.	Boric acid.
Option B.	Distilled water.
Option C.	Bicarbonate of soda.
Correct Answer is.		Boric acid.
Explanation.	Boric acid.
Question Number.		28.	Before operating generators in parallel, their voltages should be
matched to prevent.

Option A. large circulating currents developing.

Option B. overloading the generator drive and shearing of splines.

Option C. voltage spikes of sufficient magnitude to trigger GCU overvoltage circuits.

Correct Answer is. overloading the generator drive and shearing of splines.

Explanation. Pallett Aircraft Electrical Systems 3rd Edition Page 52.

Question Number. 29. Consumer loads are connected to a busbar.

Option A. in series so when loads are shed voltage is reduced.

Option B. in parallel so when loads are shed current is reduced.

Option C. in series so when loads are shed current is reduced.

Correct Answer is. in parallel so when loads are shed current is reduced.

Explanation. All loads are connected in parallel with each other.

Question Number.		30.	A current transformer connected on the neutral star point of a
generator is for.
Option A.	overload protection.
Option B.	differential current protection.
Option C.	negative sequence protection.
Correct Answer is.		differential current protection.
Explanation.	Pallett Aircraft Electrical Systems 3rd Edition Page 121.
Question Number.		31.	Differential protection as applied to AC generation systems
compares.

Option A. generator current to busbar current.

Option B. generator voltage to busbar voltage.

Option C. ambient pressure to cabin pressure.

Correct Answer is. generator current to busbar current.

Explanation. Pallett Aircraft Electrical Systems 3rd Edition Page 121.

Question Number. 32. In an AC generation system, the frequency and phase rotation.

Option A. must be synchronised prior to paralleling.

Option B. is of no consequence after paralleling.

Option C. must be out of phase prior to paralleling.

Correct Answer is. must be synchronised prior to paralleling.

Explanation. Pallett Aircraft Electrical Systems 3rd Edition Page 48.

Question Number.		33.	Diodes are placed across a contactor to.
Option A.	ensure smooth contactor operation.
Option B.	prevent contact bounce.
Option C.	speed up operation by reducing back EMF.
Correct Answer is.		speed up operation by reducing back EMF.
Explanation.	NIL.	http://homepages.which.net/~paul.hills/Solenoids/SolenoidsBody.html
Question Number.		34.	Placing the battery master switch to off during flight will.
Option A.	isolate the battery from the main busbar.
Option B.	shut down the APU.
Option C.	disconnect all power to the main busbar.
Correct Answer is.		isolate the battery from the main busbar.
Explanation.	The Battery master switch simply connects the battery to the main busbar,

allowing it to be charged from the generator(s).

Question Number.		35.	Whilst operating paralleled AC constant frequency generators, it is
important to maintain generator outputs at the same voltage.
Option A.	to prevent a circulating current of considerable magnitude developing between
two or more generators.
Option B.	to prevent CSD shock loading.
Option C.	to prevent a circulating current developing between two or more TRUs.
Correct Answer is.		to prevent a circulating current of considerable magnitude developing
between two or more generators.
Explanation.	NIL.
Question Number.		36.	A voltage regulator installed in series with a generator field.

Option A. uses a voltage coil in series with generator output.

Option B. uses a voltage coil in parallel with generator output.

Option C. uses a current coil in parallel with generator output.

Correct Answer is. uses a voltage coil in parallel with generator output.

Explanation. Aircraft Electricity and Electronics, Eismin page 199200.

Question Number.		37.	CSD warning lights on the flight deck normally indicate.
Option A.	high oil pressure, low oil temperaturelow oil pressure, high oil temperature.
Option B.	low oil pressure, low oil temperature.
Option C.	low oil pressure, high oil temperature.
Correct Answer is.		low oil pressure, high oil temperature.
Explanation.	Jeppesen A&P Airframe Technician Textbook , page 750.
Question Number.		38.	The output frequency of a hydraulically driven standby generator
is controlled by.
Option A.	an hydraulically actuated swash plate.
Option B.	a CSD.
Option C.	an IDG.
Correct Answer is.		an hydraulically actuated swash plate.
Explanation.	NIL.
Question Number.		39.	An AC generator used with a CSD.
Option A.	needs a voltage controller to maintain voltage with increasing load.
Option B.	does not need a voltage controller because current is kept constant.
Option C.	does not need a voltage controller because voltage is kept constant.
Correct Answer is.		needs a voltage controller to maintain voltage with increasing load.

Explanation. NIL.

Question Number.		40.	Power to a GCU is supplied.
Option A.	initially by a ‘field tickling’ supply and then PMG output.
Option B.	by the battery bus or rectified generator output.
Option C.	by the generator output only.
Correct Answer is.		initially by a ‘field tickling’ supply and then PMG output.
Explanation.	Jeppesen A&P Technician Airframe Textbook Page 724. PMG is main supply
for GCU, battery is back up power for GCU.
Question Number.		41.	Trip signals for a GCR are.
Option A.	overfrequency and undervoltage.
Option B.	differential protection and undervoltage.
Option C.	underfrequency and overcurrent.
Correct Answer is.		differential protection and undervoltage.
Explanation.	NIL.
Question Number.		42.	Abnormal CSD operation is monitored on the flight deck by
observing indications of.
Option A.	low oil quantity / low oil temperature.
Option B.	high oil temperature / low oil pressure.
Option C.	High oil temperature / low oil quantity.
Correct Answer is.		high oil temperature / low oil pressure.
Explanation.	Jeppesen A&P Airframe Technician Textbook , page 750.
Question Number.		43.	Wires in hot temperature areas should be bound with.
Option A.	Teflon.
Option B.	Nomex.
Option C.	PVC.
Correct Answer is.		Teflon.
Explanation.	This is probably referring to the Teflon tape referred to in Aircraft Electricity and

Electronics by Eismin 5th Edition Page 69. Also AC43 Para.11.96 z and Appendix 1 (Teflon is Dupont tradename for PTFE).

Question Number.		44.	A heat gun should be operated at.
Option A.	100°C above the specified.
Option B.	100°C below the specified.
Option C.	the specified temperature.
Correct Answer is.		the specified temperature.
Explanation.	A heat gun should be operated at the specified temperature, or 100°C (approx)

above the heatshrink temperature.

Question Number.		45.	High voltages on a generator in a parallel system should be
prevented because.
Option A.	it will trip the GCR.
Option B.	it will damage the drive shaft.
Option C.	it will cause high circulating current in the bus / other generators.
Correct Answer is.		it will trip the GCR.
Explanation.	NIL.
Question Number.		46.	Overvoltage condition trips the generator. The time taken to trip
the GCU depends on.
Option A.	amplitude of voltage.
Option B.	closing of fuel and hydraulic valves.
Option C.	time delay circuit.
Correct Answer is.		amplitude of voltage.
Explanation.	Inverse time delay c could also be considered correct. Aircraft Electricity and
Electronics, Eismin, page 203.
Question Number.		47.	Speed of an HMG is controlled by a.
Option A.	CSD unit.
Option B.	swashplate.
Option C.	ID unit.
Correct Answer is.		swashplate.
Explanation.	Speed of an HMG is controlled by a swashplate.
Question Number.		48.	A permanent magnet should have.
Option A.	low retentivity, low coercivity.
Option B.	high retentivity, low coercivity.
Option C.	low retentivity, high coercivity.
Correct Answer is.		high retentivity, low coercivity.
Explanation.	NIL.
Question Number.		49.	What will happen if the aircraft battery becomes overheated?.
Option A.	The power supply to the battery charger will be interrupted.
Option B.	The battery charger will switch to trickle charge mode.
Option C.	The hot battery bus will be disconnected from the battery.
Correct Answer is.		The battery charger will switch to trickle charge mode.

Explanation. B737 switches to trickle charge. However, see Pallett Aircraft Electrical Systems 3rd Edition Figure 1.32 for charger disconnect system.

Question Number.		50.	When the temperature increases in a lead acid battery, the SG will.
Option A.	decrease.
Option B.	increase.
Option C.	remain the same.
Correct Answer is.		decrease.
Explanation.	Since volume increases, but mass remains constant, with temperature, density
decreases.
Question Number.		51.	On testing a generator it is found to require adjusting, where would
you adjust it?.
Option A.	In the cockpit on the flight engineers panel.
Option B.	On the GCU.
Option C.	By means of a remote trimmer.
Correct Answer is.		By means of a remote trimmer.
Explanation.	Adjusted with a remote trimmer.
Question Number.		52.	Control of hydraulically powered emergency electrical generator
frequency is.
Option A.	by CSU.
Option B.	by angle of swash plate.
Option C.	by IDG.
Correct Answer is.		by angle of swash plate.
Explanation.	Control of an HPG is via a swashplate.
Question Number.		53.	When a nicad battery is fully charged.
Option A.	the electrolyte level is higher level than normal.
Option B.	the electrolyte level is lower than normal.
Option C.	the electrolyte level stays the same.
Correct Answer is.		the electrolyte level is higher level than normal.
Explanation.	Jeppesen A&P Technician Airframe Textbook 732.
Question Number.		54.	Electrical load on aircraft is controlled by.
Option A.	a BPCU.
Option B.	an IRS.
Option C.	a GCU.

Correct Answer is. a BPCU.

Explanation. B767 MM 424100 quote: ‘The BPCU shares status information with the GCU’s.

The BPCU controls all electrical buses and controls load shedding.’.

Question Number.		55.	A 4:1 stepup transformer receives 120VAC in its primary and has
1600 Ohms resistance in its secondary. What is the current drawn from the source?.
Option A.	1.2 A.
Option B.	0.3 A.
Option C.	3 A.
Correct Answer is.		1.2 A.
Explanation.	Find current in secondary I = V/R = 480/1600 = 3/10A. Next find current in
Primary = 4 x 3/10 = 12/10 = 1.2A.
Question Number.		56.	After engine start using a NiCad battery, the pilot observes on the

battery charger indicator, an initial high current draw followed by a rapid decrease in current.

Option A. there is a problem with the charging circuit and he must shutdown the engines.

Option B. the battery is faulty.

Option C. no cause for concern.

Correct Answer is. no cause for concern.

Explanation. This is normal.

Question Number.		57.	Topping up a NiCad battery in situ.
Option A.	is not allowed.
Option B.	is only allowed in the shop.
Option C.	is permitted.
Correct Answer is.		is not allowed.
Explanation.	CAIPs EEL/13 Para 6.4.
Question Number.		58.	In a leadacid battery after numerous checks, one cell has low
reading.
Option A.	It needs topping up.
Option B.	It must be replaced.
Option C.	It is defective.
Correct Answer is.		It must be replaced.
Explanation.	NIL.
Question Number.		59.	A short range passenger aircraft has complete electrical failure.

What time duration would the battery be expected to power essential equipment?.

Option A. 30 minutes.

Option B. Forever.

Option C. 60 minutes.

Correct Answer is. 30 minutes.

Explanation. AWN 81 para 3.1.2 now transferred to CAP 747 GR no 4.

Question Number. 60. An external power plug has two short pins. These are used for.

Option A. ground handling bus.

Option B. the interlock circuit.

Option C. a guide for correct alignment of the plug in the socket.

Correct Answer is. the interlock circuit.

Explanation. Aircraft Instruments and Integrated Systems, Pallett Page 290.

Question Number.		61.	The purpose of a synchronising bus bar is.
Option A.	to allow monitoring and trimming from the flight deck.
Option B.	to enable two propeller systems to be synchronised.
Option C.	to monitor total current load.
Correct Answer is.		to allow monitoring and trimming from the flight deck.
Explanation.	Aircraft Electrical Systems Pallett Page 51 and 52.
Question Number.		62.	To confirm the state of charge of a nicad battery.
Option A.	measure the discharge time.
Option B.	subject the battery to load, check voltage and check the SG of each cell.
Option C.	subject the battery to load and check the voltage.
Correct Answer is.		measure the discharge time.
Explanation.	CAIPs EEL/13 4.5.6 and 4.7.
Question Number.		63.	Circulating currents are associated with.
Option A.	AC and DC generators in parallel.
Option B.	AC generators in parallel.
Option C.	DC generators in parallel.
Correct Answer is.		AC generators in parallel.
Explanation.	NIL.
Question Number.		64.	Generator brush bedding.
Option A.	should only be done if 50% of the width and 80% of the length is already being
done.
Option B.	should not be done on the aircraft.
Option C.	can be done on the aircraft.

Correct Answer is. can be done on the aircraft.

Explanation. CAIPs EEL/14 4.3.6 (Does not say that it cannot be done on the aircraft but would be difficult).

Question Number. 65. What is the amperage at point ” to the nearest amp?.

Option A.	100	Amps.
Option B.	101	Amps.
Option C.	102	Amps.
Correct Answer is.		101 Amps.
Explanation.	100 volts accross far right load, therefore 100 volts also accross 100ohm load

(parallel circuit theory) I = V/R = 100/100 = 1A through 100 ohm load. (Ohms Law) Total current at ” is 100 + 1 = 101 Amps. (Kirkchoff’s Law).

Question Number.		66.	Pitot tubes are heated by.
Option A.	DC.
Option B.	AC.
Option C.	AC or DC.
Correct Answer is.		AC or DC.
Explanation.	Aircraft Instruments and Integrated Systems, Pallett 3rd edition Page 32.
Question Number.		67.	Paralleling is used for.
Option A.	AC and DC electrical generators.
Option B.	DC electrical generators only.
Option C.	AC electrical generators only.
Correct Answer is.		AC and DC electrical generators.
Explanation.	NIL.
Question Number.		68.	Battery charging procedures can be found in ATA.

Option A.	Chapter 24 Section 21.
Option B.	Chapter 24 Section 31.
Option C.	Chapter 31 Section 21.
Correct Answer is.		Chapter 24 Section 31.
Explanation.	NIL.
Question Number.		69.	In a carbon pile regulator, the resistive element is.
Option A.	in series with the field and changes resistance with surface area contact.
Option B.	in parallel with the field and changes resistance with changing length.
Option C.	in series with the field and changes resistance with changing length.
Correct Answer is.		in series with the field and changes resistance with surface area contact.
Explanation.	CAIPs EEL/12 3.1.
Question Number.		70.	Maximum battery temperature on charging before protection
circuit starts is.
Option A.	144 degrees C.
Option B.	144 degrees F.
Option C.	71 degrees F.
Correct Answer is.		144 degrees F.
Explanation.	NIL.
Question Number.		71.	If an aircraft has no battery charger, the battery is charged by.
Option A.	constant current until a predetermined limit when it automatically switches to
constant voltage.
Option B.	constant current.
Option C.	constant voltage.
Correct Answer is.		constant voltage.
Explanation.	NIL.
Question Number.		72.	The output of a carbon pile regulator with no variation of loading
is.
Option A.	stationary.
Option B.	pulse width modulating.
Option C.	fluctuating.
Correct Answer is.		stationary.
Explanation.	CAIPs EEL/12 3.1.1.
Question Number.		73.	In a transistor voltage regulator, the voltage output is controlled by.
Option A.	zeners and transistors.
Option B.	diodes and transformers.
Option C.	transformers and transistors.
Correct Answer is.		zeners and transistors.
Explanation.	CAIPs EEL/12 3.3.1.
Question Number.		74.	A paralleled relay for a DC system is energised and connected by.

Option A.	voltage coil.
Option B.	current coil.
Option C.	voltage and current coil.
Correct Answer is.		voltage and current coil.
Explanation.	Pallett Aircraft Electrical Systems Page 16, 17, 18.
Question Number.		75.	Increasing the real load primarily.
Option A.	increases output voltage and increases frequency.
Option B.	decreases output voltage.
Option C.	decreases frequency.
Correct Answer is.		decreases frequency.
Explanation.	NIL.
Question Number.		76.	Inductive reactive load causes.
Option A.	no effect on torque but produces extra heat dissipated.
Option B.	increase in torque only.
Option C.	increase in torque and increase in heat dissipated.
Correct Answer is.		no effect on torque but produces extra heat dissipated.
Explanation.	NIL.
Question Number.		77.	The power factor of an AC generator identifies the proportion of.

Option A. apparent power from the generator that does work.

Option B. real power from the generator that does work.

Option C. reactive power from the generator that does work.

Correct Answer is. real power from the generator that does work.

Explanation. NIL.

Question Number.		78.	Differential protection in an AC system protects against.
Option A.	lineline, linelineline, lineearth faults.
Option B.	short circuits.
Option C.	a reverse current flowing from the battery.
Correct Answer is.		short circuits.
Explanation.	Aircraft Electrical Systems. Pallett Page 121.
Question Number.		79.	When resetting the CSD on the ground, the engine should be.
Option A.	rotating at Nsync.
Option B.	rotating at idle.
Option C.	stationary.

Correct Answer is.		stationary.
Explanation.	NIL.
Question Number.		80.	One of the main purposes of a CSD is to.
Option A.	prevent engine overload.
Option B.	enable generators to be paralleled.
Option C.	maintain constant load on the generator.
Correct Answer is.		enable generators to be paralleled.
Explanation.	Pallett Aircraft Electrical Systems Page 37.

Question Number.	81.	In an undervolt condition in an AC generator system, the most
likely consequence is.

Option A. activation of the time delay circuit.

Option B. energise the bus tie relay.

Option C. deactivation of the field regulatory TRs.

Correct Answer is. activation of the time delay circuit.

Explanation. NIL.

Question Number.		82.	If voltage and frequency of the generator drop to zero in flight, it
would be an indication that the.
Option A.	bus tie interlock is inoperative.
Option B.	CSD driveshaft had sheared.
Option C.	phase sequence detection circuit has operated.
Correct Answer is.		CSD driveshaft had sheared.
Explanation.	NIL.
Question Number.		83.	Assuming all systems are operating normally, as aircraft electrical
load increases, generator output voltage will.
Option A.	increases and amperage output increases.
Option B.	remain constant and amperage output increases.
Option C.	decrease and amperage output increases.
Correct Answer is.		remain constant and amperage output increases.
Explanation.	NIL.
Question Number.		84.	When installing multiple batteries on aircraft, they are connected
in.
Option A.	series.
Option B.	either parallel or series and switched between as an option.

Option C.	parallel.
Correct Answer is.		either parallel or series and switched between as an option.
Explanation.	Aircraft Electrical Systems. Pallett Page 23/26/27.
Question Number.		85.	What is the small pin on the DC ground power connector?.
Option A.	Positive to external power relay.
Option B.	Positive to battery relay.
Option C.	Ground or earth.
Correct Answer is.		Positive to external power relay.
Explanation.	Aircraft Electrical Systems. Pallett Page 70.

Question Number.		86.	How is RAT driven?.
Option A.	Airstream.
Option B.	Compressor.
Option C.	Fan.
Correct Answer is.		Airstream.
Explanation.	Ram Air Turbine.
Question Number.		87.	How is an aircraft battery rated?.
Option A.	Ampere hours.
Option B.	Joules.
Option C.	Watts.
Correct Answer is.		Ampere hours.
Explanation.	Aircrfat Electrical Systems Pallett Page 21.
Question Number.		88.	A reduction in field strength of a DC shunt motor driving a
constant load will result in.
Option A.	reduced torque and increased speed.
Option B.	increased torque and speed.
Option C.	increased torque and reduced speed.
Correct Answer is.		increased torque and speed.
Explanation.	Aircraft Electrical Systems Pallett Page 138 (reduces Back EMF).
Question Number.		89.	What are the 2 short prongs on an AC plug for?.
Option A.	Using AC current to pull on interlock circuit.
Option B.	To prevent arcing during plug connection / disconnection.
Option C.	To help plug location/fit.
Correct Answer is.		To prevent arcing during plug connection / disconnection.
Explanation.	The short prongs are for DC only. Aircraft Electrical System, Pallett pg 72.
Question Number.		90.	A vibration contact voltage regulator consists of a shunt winding

and a.

Option A. current regulation coil in series.

Option B. voltage regulating coil in series.

Option C. voltage regulating coil in parallel.

Correct Answer is. current regulation coil in series.

Explanation. Aircraft Electrical Systems. Pallett Page 11.

Question Number.		91.	What is the purpose of diode in a power GCR?.
Option A.	To allow flow in the event of failure of the relay.
Option B.	To speed up the operation.
Option C.	To prevent backflow of current in the EMF coil.
Correct Answer is.		To prevent backflow of current in the EMF coil.
Explanation.	The diode is to prevent the high current flow in the coil due to induction as the
relay switches off.

Question Number. 92. Eddy currents are.

Option A. circulating currents.

Option B. caused by heating effect of the coil.

Option C. caused by resistance of the coil.

Correct Answer is. circulating currents.

Explanation. NIL. http://www.google.com/search?q=define:Eddy+Currents

Question Number.		93.	The small pins in the power connector plug are.
Option A.	negative.
Option B.	neutral.
Option C.	positive.
Correct Answer is.		positive.
Explanation.	Aircraft Electrical Systems Pallett Page 70.
Question Number.		94.	When an overvolt is present on an AC generator system, the
tripping circuit.

Option A. trips after a time delay inversely proportional to overvolt amplitude.

Option B. trips after a time delay.

Option C. trips at a set level.

Correct Answer is. trips after a time delay inversely proportional to overvolt amplitude.

Explanation. Aircraft Electrical Systems Pallett Page 119/120.

Question Number. 95. In an AC distribution system, the purpose of the synchronising

busbar is to.

Option A. provide a means of monitoring the load.

Option B. provide interconnection between the generator load busbars.

Option C. supply essential services.

Correct Answer is. provide interconnection between the generator load busbars.

Explanation. Aircraft Electrical Systems Pallett Page 81.

Question Number.		96.	Vibrating contact voltage regulator sensing coil is.
Option A.	across the generator output.
Option B.	in series with the field windings.
Option C.	in parallel with the field windings.
Correct Answer is.		in parallel with the field windings.
Explanation.	EEL/12 Page 5, Aircraft Electrical Systems Page 11.

Question Number.		97.	A current transformer connected across the neutral of a 3 phase
generator is for.
Option A.	load monitoring.
Option B.	phase sequence monitoring.
Option C.	differential protection.
Correct Answer is.		differential protection.
Explanation.	Aircraft Electrical Systems Pallett Page 121.
Question Number.		98.	Zener diodes are for.
Option A.	voltage stabilisation.
Option B.	voltage regulation.
Option C.	rectification.
Correct Answer is.		voltage regulation.
Explanation.	An old Module 4 question. Although Zener diodes can be used (backtoback) to

protect equipment from voltage spikes (voltage stabilisation) they are more commonly associated with voltage regulation.

Question Number. 99. AC generator output indications are measured in.

Option A. KVA & KW.

Option B. KW & KVAR.

Option C. KW.

Correct Answer is. KVA & KW.

Explanation. An AC generator is rated in KVA and KW (or KVA and power factor, from which KW can be calculated). However, a DC generator is rated in KW only.

Question Number. 100. Load shedding allows.

Option A. less current to the busbar.

Option B. more current to the busbar.

Option C. more voltage to the busbar.

Correct Answer is. less current to the busbar.

Explanation. Load shedding is carried out to reduce current (voltage is constant).

Question Number.		101. How may the output of a transistorised voltage regulator be
described?.
Option A.	Variable AC.
Option B.	Pulse width modulated DC.
Option C.	Slightly variable DC.
Correct Answer is.		Pulse width modulated DC.
Explanation.	A voltage regulator has two outputs, one to the generator field (pulse width

modulated on a transistorised regulator) and one to the busbar (constant voltage but variable current depending on load). The answer here depends upon which output they are referring.

Question Number.		102. In the event of complete AC generator failure in an AC split
busbar generation system, how is power maintained to the essential AC busbar?.
Option A.	By power fed from a battery supplied static inverter.
Option B.	By power fed from a hot battery busbar only.
Option C.	By power fed from static inverter only.
Correct Answer is.		By power fed from a battery supplied static inverter.
Explanation.	Aircraft Electrical Systems Pallett Page 78 Fig. 5.2.
Question Number.		103. Which components within a generator control unit connects the
output of the field power supply to the generator exciter?.
Option A.	Generator power pilot relay.
Option B.	Generator line contactor.
Option C.	Generator control relay.
Correct Answer is.		Generator control relay.
Explanation.	Not sure of the point of this question. The GCR is the only one which is
(sometimes) ‘within’ the GCU. (Never heard of a ‘generator power pilot relay’).
Question Number.		104. In what units are static inverters rated?.
Option A.	kVA.
Option B.	kVAR.
Option C.	kW.
Correct Answer is.		kVA.
Explanation.	VA or KVA, just like an AC generator.

Question Number.		105. In a generator system, a stability winding is used.
Option A.	in series with the field to prevent oscillations.
Option B.	to control output current.
Option C.	to prevent voltage overshoot.
Correct Answer is.		to prevent voltage overshoot.
Explanation.	EEL/12 3.4.5 (d).
Question Number.		106. On engine shutdown, what prevents GCR being tripped?.
Option A.	Undervolt.
Option B.	Underfrequency.
Option C.	Undercurrent.
Correct Answer is.		Underfrequency.
Explanation.	Aircraft Electrical Systems Pallett page 120.

Question Number.

107.

How is real and reactive load sharing achieved in an AC parallel

generator system?.

Option A. Real load by control of the constant speed drives, reactive load by adjustment of generator fields.

Option B. Real and reactive loads by control of the constant speed drives only. Output voltage is controlled by adjustment of generator fields.

Option C. Real load by control of generator fields, Reactive loads by adjustment of the constant speed drives.

Correct Answer is. Real load by control of the constant speed drives, reactive load by adjustment of generator fields.

Explanation. Aircraft Electrical Systems Pallett page 48 and 49.

Question Number.		108. Other than when there is a fault in an aircraft battery or its
charging system, when is the charger switched off automatically?.
Option A.	When the battery is used for excessively high discharge currents such as in
starting.
Option B.	When the alternators are fully loaded.
Option C.	When there is a failure of one alternator in a splitbus bar system.
Correct Answer is.		When the battery is used for excessively high discharge currents such as in
starting.
Explanation.	NIL.
Question Number.		109. The trimmer resister in a carbon pile volts regulator is.
Option A.	in series with the generator field.
Option B.	in series with the generator volts coil.
Option C.	in parallel with the generator volts coil.
Correct Answer is.		in series with the generator volts coil.
Explanation.	EEL/12 Fig 1.

Question Number.		110. When a field relay trips the generator offline, it can be reset.
Option A.	after the fault has been cleared.
Option B.	by cycling the generator switch.
Option C.	on the ground only.
Correct Answer is.		on the ground only.
Explanation.	NIL.
Question Number.		111. In a paralleled AC generator system both A phases must be in
synchronisation and.
Option A.	CBA must equal ABC.
Option B.	phase rotation does not matter.
Option C.	CBA must equal CBA.
Correct Answer is.		CBA must equal CBA.
Explanation.	NIL.
Question Number.		112. When loads are shed from a busbar automatically.
Option A.	bus bar current decreases.
Option B.	bus bar current rises.
Option C.	bus bar voltage rises.
Correct Answer is.		bus bar current decreases.
Explanation.	NIL.
Question Number.		113. What controls output from the generator?.
Option A.	BPCU.
Option B.	GCU.
Option C.	ELCU.
Correct Answer is.		GCU.
Explanation.	Aircraft Electricity and Electronics, Eismin, has full descriptions of all 3 units.
Question Number.		114. Specific Gravity in a lead acid battery should give an indication of.
Option A.	charge.
Option B.	electrolyte temperature.
Option C.	electrolyte level.
Correct Answer is.		charge.
Explanation.	Nil.
Question Number.		115. During normal engine shutdown, the generator.
Option A.	breaker and control relay are both tripped.
Option B.	breaker is tripped only.

Option C. control relay is tripped only.

Correct Answer is. breaker is tripped only.

Explanation. B757 Maintenance Training Manual.

Question Number.		116. The generator warning light will come on when.
Option A.	voltage is too high.
Option B.	voltage is above battery voltage.
Option C.	voltage is below battery voltage.
Correct Answer is.		voltage is below battery voltage.
Explanation.	NIL.
Question Number.		117. When replacing a current transformer.
Option A.	it can be fitted any way round.
Option B.	voltage/current selection must be made prior to fitting.
Option C.	it can only be fitted one way round.
Correct Answer is.		it can only be fitted one way round.
Explanation.	NIL.
Question Number.		118. The economy coil on a relay.
Option A.	reduces current required to hold closed.
Option B.	makes it cheaper to make.
Option C.	reduces current required to close.
Correct Answer is.		reduces current required to hold closed.
Explanation.	NIL.
Question Number.		119. What is the function of the generator control relay?.
Option A.	Bring the generator online.
Option B.	Connect the generator to the busbar.
Option C.	Control output voltage.
Correct Answer is.		Bring the generator online.
Explanation.	NIL.
Question Number.		120. The current consumed by a DC starter motor will.
Option A.	remain constant.
Option B.	increase as the engine speed increases.
Option C.	decrease as the engine speed increases.
Correct Answer is.		decrease as the engine speed increases.
Explanation.	Decreases due to the back EMF as engine speed increases.
Question Number.		121. A neutralising agent for sulphuric acid is.
Option A.	borax powder.

Option B.	citric acid.
Option C.	sodium bicarbonate.
Correct Answer is.		sodium bicarbonate.
Explanation.	Jeppesen A & P Technician Airframe Textbook p 730 refers.
Question Number.		122. In a split bus power distribution system.
Option A.	each generator supplies its own bus and distribution system in normal operation.
Option B.	generators are paralleled on connection to the tie bus.
Option C.	power is split between 115V AC and 28V DC.
Correct Answer is.		each generator supplies its own bus and distribution system in normal
operation.
Explanation.	NIL.
Question Number.		123. Flashing a generator field.
Option A.	decreases resistance.
Option B.	restores magnetism.
Option C.	increases resistance.
Correct Answer is.		restores magnetism.
Explanation.	NIL.
Question Number.		124. When checking SG of electrolyte of lead acid battery, what should
be taken into account?.
Option A.	Electrolyte temperature.
Option B.	Battery charge.
Option C.	Ambient temperature.
Correct Answer is.		Electrolyte temperature.
Explanation.	EEL/11 4.3.4.
Question Number.		125. How do you check condition of NiCad battery in situ?.
Option A.	By voltmeter connected to the battery terminal.
Option B.	By voltmeter in the cockpit when battery is off load.
Option C.	By voltmeter in the cockpit, when battery is on load.
Correct Answer is.		By voltmeter in the cockpit, when battery is on load.
Explanation.	Aircraft Electrical Systems, Pallett Page 23.
Question Number.		126. The reactive load circuit in a multiengined AC generator system.

Option A. modifies generator field excitation current.

Option B. modifies generator drive speed.

Option C. modifies generator field excitation voltage.

Correct Answer is. modifies generator field excitation current.

Explanation. Aircraft Electrical Systems, Pallett Page 49.

Question Number.		127. A vibrating type voltage regulator uses a volts coil.
Option A.	in series with the generator output.
Option B.	in series with the current coil.
Option C.	in parallel with the generator output.
Correct Answer is.		in parallel with the generator output.
Explanation.	EEL/12 3.2.1.
Question Number.		128. The purpose of the economy contacts in a relay is to.
Option A.	prevent contact pitting and burning.
Option B.	reduce the current required to hold the contacts closed.
Option C.	close the auxiliary contacts before the main contacts.
Correct Answer is.		reduce the current required to hold the contacts closed.
Explanation.	NIL.
Question Number.		129. A vibrating contact voltage regulator has.
Option A.	a resistor in series with the points.
Option B.	a volts coil in parallel with the points.
Option C.	a resister in parallel with the points.
Correct Answer is.		a resister in parallel with the points.
Explanation.	EEL/12 Figure 3.
Question Number.		130. Brush beddingin on a starter generator can be carried out.
Option A.	when 80 percent of the brush area has been previously bedded in, on the bench.
Option B.	only off the aircraft.
Option C.	during flight.
Correct Answer is.		only off the aircraft.
Explanation.	NIL.
Question Number.		131. What would be the cause of a low electrolyte level in a nicad
battery?.
Option A.	Evaporation.
Option B.	Over charging current.
Option C.	Undercharging current.
Correct Answer is.		Over charging current.
Explanation.	CAIPs EEL/1.3 Page 3 Para 3.4.1.
Question Number.		132. An AC generator connected to a CSD requires.
Option A.	a separate voltage regulator.
Option B.	no voltage regulator as the CSD will control generator frequency.
Option C.	no voltage regulator as the CSD will control the voltage.
Correct Answer is.		a separate voltage regulator.
Explanation.	NIL.
Question Number.		133. If electrolyte from a leadacid battery is spilled in the battery

compartment, which procedure should be followed?.

Option A. Apply sodium bicarbonate solution to the affected are followed by a water rinse.

Option B. Apply boric acid solution to the affected area followed by a water rinse.

Option C. Rinse the affected area thoroughly with clean water.

Correct Answer is. Apply sodium bicarbonate solution to the affected are followed by a water rinse.

Explanation. CAIPs EEL/11 4.1.4.

Question Number.		134. Which statement regarding the hydrometer reading of a leadacid
storage battery electrolyte is true?.
Option A.	A specific gravity correction should be subtracted from the hydrometer reading if
the electrolyte temperature is above 20°C.
Option B.	The hydrometer reading will give a true indication of the capacity of the battery
regardless of the electrolyte temperature.
Option C.	The hydrometer reading does not require a temperature correction if the
electrolyte temperature is 60°F.
Correct Answer is.		The hydrometer reading does not require a temperature correction if the
electrolyte temperature is 60°F.
Explanation.	CAIPS EEL/11 4.3.4 (American Text such as Jeppesen AandP Technician

Airframe Textbook Page 727 specify 80°F as the standard, but CAIPs specifies 60°F as standard take your pick).

Question Number.		135. An increase in the speed of a DC generator will cause the voltage
to rise with the following resultant action in the voltage regulator:.
Option A.	The volts coil to exert more pull thus increasing the current in the generator field.
Option B.	The volts coil to increase its magnetic field thus decreasing the field excitation.
Option C.	The volts coil to exert less pull thus increasing the resistance of the carbon pile.
Correct Answer is.		The volts coil to increase its magnetic field thus decreasing the field
excitation.
Explanation.	EEL/12 3.1.1.
Question Number.		136. The equalizing coils on voltage regulators will.
Option A.	be connected to each other when the generators are paralleled.
Option B.	have current passing through them only when the generators are not paralleled.
Option C.	have current passing through them from the higher loaded generator to the lower.
Correct Answer is.		have current passing through them from the higher loaded generator to the
lower.
Explanation.	Aircraft Electricity and Electronics Thomas Eismin 5th Edition page 200.
Question Number.		137. A fully charged leadacid battery will not freeze until extremely
low temperatures are reached because.
Option A.	the acid is in the plates, thereby increasing the specific gravity of the solution.
Option B.	increased internal resistance generates sufficient heat to prevent freezing.

Option C. most of the acid is in the solution.

Correct Answer is. most of the acid is in the solution.

Explanation. CAIPs EEL/11 4.6.2.

Question Number.		138.	What determines the amount of current which will flow through a
battery while it is being charged by a constant voltage source?.
Option A.	The total plate area of the battery.
Option B.	The stateofcharge of the battery.
Option C.	The amperehour capacity of the battery.
Correct Answer is.		The stateofcharge of the battery.
Explanation.	NIL.
Question Number.		139.	The method used to rapidly charge a nickelcadmium battery
utilizes.

Option A. constant current and varying voltage.

Option B. constant voltage and varying current.

Option C. constant current and constant voltage.

Correct Answer is. constant voltage and varying current.

Explanation. Aircraft Electricity and Electronics Eismin Page 52. CAIPs EEL/13 4.5.1.

Question Number. 140. The presence of small amounts of potassium carbonate deposits on the top of nickelcadmium battery cells that have been in service for time is an indication of.

Option A.	normal operation.
Option B.	excessive gassing.
Option C.	excessive plate sulphation.
Correct Answer is.		excessive gassing.
Explanation.	Aircraft Electrical Systems Page 23 and Aircraft Electricity and Electronics
Eismin Page 50 but see also CAIPs EEL/13 4.2 (h).
Question Number.		141. The servicing and charging of nickelcadmium and leadacid
batteries together in the same service area is likely to result in.
Option A.	contamination of both types of batteries.
Option B.	increased explosion and/or fire hazard.
Option C.	normal battery service life.
Correct Answer is.		contamination of both types of batteries.
Explanation.	CAIPs EEL/21 Page 1 Para 2.11.
Question Number.		142. If the current drawn from No.1 generator of a twin generator DC

system is less than that drawn from No.2 generator, the current in the No.2 generator equalizing

coil will flow.

Option A. in the same direction as the current flow in the voltage coil, reducing the output of No.2 generator.

Option B. in the same direction as the current flow in the voltage coil, increasing the output of No.2 generator.

Option C. in the opposite direction to the current flow in the voltage coil, reducing the output of No.2 generator.

Correct Answer is. in the same direction as the current flow in the voltage coil, reducing the

output of No.2 generator.

Explanation. CAIPs EEL/13 4.2 (h).

Question Number.		143. On a C.S. driven generator, operation of the Disconnect Solenoid
will disconnect the generator drive and.
Option A.	it will automatically reset itself when the fault is rectified.
Option B.	it can only be reset when all loads are switched off.
Option C.	resetting can only be carried out on the ground.
Correct Answer is.		resetting can only be carried out on the ground.
Explanation.	NIL.

Question Number.

144.

In a constant frequency AC system, real load sharing is achieved

by regulating the.

Option A. generator drive torque.

Option B. generator speed.

Option C. voltage regulator.

Correct Answer is. generator drive torque.

Explanation. Aircraft Electrical Systems, Pallett Page 4849.

Question Number.		145. A constant speed drive unit has a warning light indication.
Option A.	for low speed.
Option B.	for low oil pressure.
Option C.	for when it is disconnected from the generator.
Correct Answer is.		for low oil pressure.
Explanation.	NIL.
Question Number.		146. The electrolyte of a nickelcadmium battery is the lowest when the
battery is.
Option A.	being charged.
Option B.	under load condition.
Option C.	in a discharged condition.

Correct Answer is.		in a discharged condition.
Explanation.	EEL/13 3.4.2.
Question Number.		147. Nickelcadmium batteries which are stored for a long period of
time will show a low fluid level because the.
Option A.	fluid evaporates through vents.
Option B.	electrolyte becomes absorbed in the plates.
Option C.	fluid level was not periodically replenished.
Correct Answer is.		electrolyte becomes absorbed in the plates.
Explanation.	Jeppesen AandP Technician Airframe Textbook page 732 and 733. a) could also
be correct.
Question Number.		148. The purpose of ‘field flashing’ is to.
Option A.	test the insulation resistance of a field winding with a 1000V supply.
Option B.	measure the residual magnetism in a field winding 24 hours after the field supply
is removed.
Option C.	change the polarity of residual magnetism in a field winding.
Correct Answer is.		change the polarity of residual magnetism in a field winding.
Explanation.	Aircraft Electrical Systems, Pallett Page 4.
Question Number.		149. The purpose of an inverter is to convert.
Option A.	DC to AC.
Option B.	AC to DC.
Option C.	AC to a higher frequency AC.
Correct Answer is.		DC to AC.
Explanation.	NIL.
Question Number.		150. How can the stateofcharge of a nickelcadmium battery be
determined?.
Option A.	By the level of the electrolyte.
Option B.	By measuring the specific gravity of the electrolyte.
Option C.	By measuring discharge.
Correct Answer is.		By measuring discharge.
Explanation.	CAIPs EEL/13 4.5.6.
Question Number.		151. What may result if water is added to a nickelcadmium battery
when it is not fully charged?.
Option A.	Excessive spewing will occur during the charging cycle.
Option B.	The cell temperature will run too low for proper output.

Option C. No adverse results since water may be added anytime.

Correct Answer is. Excessive spewing will occur during the charging cycle.

Explanation. CAIPs EEL/13 4.3.

Question Number.		152. In nickelcadmium batteries, a rise in cell temperature.
Option A.	causes an increase in internal resistance.
Option B.	increases cell voltage.
Option C.	causes a decrease in internal resistance.
Correct Answer is.		causes a decrease in internal resistance.
Explanation.	CAIPs EEL/13 4.5.8 (a).
Question Number.		153. When a charging current is applied to a nickelcadmium battery,
the cells emit gas only.
Option A.	toward the end of the charging cycle.
Option B.	when the electrolyte level is low.
Option C.	if they are defective.
Correct Answer is.		toward the end of the charging cycle.
Explanation.	CAIPs EEL/13 4.5.5.

Question Number.		154. The equalising coil in the carbon pile regulator.
Option A.	modifies the effect of the voltage sensing coil.
Option B.	becomes inoperative when the undervolt relay energises.
Option C.	is connected in series with the carbon pile.
Correct Answer is.		modifies the effect of the voltage sensing coil.
Explanation.	NIL.
Question Number.		155. In a constant frequency AC system, reactive load sharing is
achieved by regulating the.
Option A.	generator speed.
Option B.	generator drive torque.
Option C.	voltage regulator.
Correct Answer is.		voltage regulator.
Explanation.	Pallett Aircraft Electrical Systems Page 48.
Question Number.		156. Underfrequency in an AC supply would cause.
Option A.	overheating of inductive devices.
Option B.	overvoltage of capacitive devices.

Option C. overspeeding of AC motors.

Correct Answer is. overheating of inductive devices.

Explanation. Inductive devices will pass more current if it is lower frequency.

Question Number.		157. The electrolyte in a leadacid battery contains.
Option A.	nitric acid.
Option B.	sulphuric acid.
Option C.	hydrochloric acid.
Correct Answer is.		sulphuric acid.
Explanation.	CAIPs EEL/11 4.1.4.
Question Number.		158. In the procedure to be followed after spillage of battery acid,
neutralizing may be carried out.
Option A.	by applying a coating of petroleum jelly.
Option B.	with a dilute solution of sodium bicarbonate.
Option C.	by washing with distilled water.
Correct Answer is.		with a dilute solution of sodium bicarbonate.
Explanation.	NIL.
Question Number.		159. Frequency (Hz) is the number of cycles per.
Option A.	revolution.
Option B.	second.
Option C.	minute.
Correct Answer is.		second.
Explanation.	NIL.
Question Number.		160. The three voltages of a three phase generator are.
Option A.	90 degrees apart.
Option B.	120 degrees apart.
Option C.	180 degrees apart.
Correct Answer is.		120 degrees apart.
Explanation.	NIL.
Question Number.		161. To restore the level of electrolyte which has been lost due to
normal gassing during battery charging.
Option A.	sulphuric acid must be added.
Option B.	electrolyte of the same specific gravity as that contained in the battery must be
added.
Option C.	distilled water must be added.
Correct Answer is.		distilled water must be added.
Explanation.	CAIPS EEL/11 4.6.1.
Question Number.		162. A 12 volt leadacid battery.

Option A.	has 24 cells.
Option B.	has 6 cells.
Option C.	has 12 cells.
Correct Answer is.		has 6 cells.
Explanation.	NIL.
Question Number.		163. The active component of an A.C. circuit is 4 amps and the reactive
is 3 amps. Ammeter reading will be.
Option A.	3.4 amps.
Option B.	7 amps.
Option C.	5 amps.
Correct Answer is.		5 amps.
Explanation.	Total current is the vector sum of active (real) and reactive currents. 3, 4, 5
triangle in this case.
Question Number.		164. In a delta connected generator.
Option A.	line volts equals 1.73 phase volts.
Option B.	phase volts equals 1.73 line volts.
Option C.	line volts equals phase volts.
Correct Answer is.		line volts equals phase volts.
Explanation.	NIL.
Question Number.		165. The only practical method of maintaining a constant voltage output
from an aircraft generator under varying conditions of speed and load is to vary the.
Option A.	speed at which the armature rotates.
Option B.	number of conductors in the armature.
Option C.	strength of the magnetic field.
Correct Answer is.		strength of the magnetic field.
Explanation.	NIL.
Question Number.		166. As the generator load is increased (within its rated capacity), the
voltage will.
Option A.	remain constant and the amperage output will decrease.
Option B.	remain constant and the amperage output will increase.
Option C.	decrease and the amperage output will increase.
Correct Answer is.		decrease and the amperage output will increase.
Explanation.	Assuming no voltage regulator is considered, otherwise b is the answer.

Question Number. 167. When checking the specific gravity of the electrolyte in a battery.

Option A. one cell only need be checked as the remainder will read the same.

Option B. each cell should be checked as the readings may differ.

Option C. only the end cells need be checked as they contain the terminals.

Correct Answer is. each cell should be checked as the readings may differ.

Explanation. NIL.

Question Number. 168. A leadacid battery is considered to be fully charged when the.

Option A. S.G. and voltage remain constant for specified period.

Option B. cells begin to gas freely.

Option C. S.G. reaches 1.180.

Correct Answer is. S.G. and voltage remain constant for specified period.

Explanation. CAIPs EEL/11 4.7.

Question Number.

169.

Which aircraft circuit would be most likely to use frequency wild

200V AC?.

Option A. Hydraulic pump.

Option B. Standby compass.

Option C. Windscreen heating.

Correct Answer is. Windscreen heating.

Explanation. Any heating or lighting circuit can be frequency wild.

Question Number.		170.	To prevent corrosion at the terminals of a leadacid battery.
Option A.	petroleum jelly may be applied to the connections.
Option B.	the connectors may be painted.
Option C.	copper connectors are used.
Correct Answer is.		petroleum jelly may be applied to the connections.
Explanation.	CAIPs EEL/11 4.2 (vi).
Question Number.		171.	Before taking S.G. readings of a leadacid battery recently
removed from an aircraft.
Option A.	the electrolyte temperature must be noted.
Option B.	a period of 1 hour should have elapsed to allow the S.G. to stabilize.
Option C.	the battery must be charged at the 10 hour rate for one hour.
Correct Answer is.		the electrolyte temperature must be noted.
Explanation.	NIL.
Question Number.		172.	The output of a DC generator is controlled by varying the.

Option A.	armature current.
Option B.	engine speed.
Option C.	field current.
Correct Answer is.		field current.
Explanation.	NIL.
Question Number.		173. A generator rated at 30 kVA power factor 0.8 has a maximum
continuous power output of.
Option A.	37.5 kW.
Option B.	30 kW.
Option C.	24 kW.
Correct Answer is.		24 kW.
Explanation.	PF = TP/AP 0.8 = TP/30 TP = 24.
Question Number.		174. The specific gravity of the electrolyte in a leadacid battery.
Option A.	remains constant with changes in the state of charge but is a useful guide to the
amount of acid contained in the electrolyte.
Option B.	remains substantially constant regardless of the state of charge and is not therefore
a guide to the state of charge.
Option C.	changes with the state of charge and is therefore a measure of the state of charge.
Correct Answer is.		changes with the state of charge and is therefore a measure of the state of
charge.
Explanation.	NIL.
Question Number.		175. A battery which is assumed to be 100% efficient and to have a
capacity of 60 amperehours at the 10 hour rate will deliver.
Option A.	6 amps for 10 hours.
Option B.	60 amps for 10 hours or 6 amps for 10 hours depending upon the rate of demand.
Option C.	60 amps for 10 hours.
Correct Answer is.		6 amps for 10 hours.
Explanation.	NIL.
Question Number.		176. Two 12V 25 ampere batteries connected in series will produce.
Option A.	12V with 25 ampere hour capacity.
Option B.	24V with 25 ampere hour capacity.
Option C.	12V with 50 ampere hour capacity.
Correct Answer is.		24V with 25 ampere hour capacity.
Explanation.	NIL.

Question Number.

generator.

177.

As an installed battery becomes fully charged by the aircraft

Option A. the battery voltage nears its nominal level so the charging current decreases.

Option B. the battery contactor isolates the battery from the generator.

Option C. the generator voltage decreases to supply the steadily decreasing current. Correct Answer is. the battery voltage nears its nominal level so the charging current decreases.

Explanation.	NIL.
Question Number.		178. On a DC shunt generator without a voltage regulator, if the load
increases the generator output voltage will.
Option A.	increase.
Option B.	remain constant.
Option C.	decrease.
Correct Answer is.		decrease.
Explanation.	NIL.
Question Number.		179. For battery charging, the electrical supply connected to the battery
must be.
Option A.	AC at 50 c.p.s.
Option B.	AC at 400 c.p.s.
Option C.	DC.
Correct Answer is.		DC.
Explanation.	NIL.
Question Number.		180. When using A.C. power on the bus bar you require 28V D.C. for
battery charging.

Option A. an A.C. inverter would be required.

Option B. an A.C. transformer and rectifier would be required.

Option C. a D.C. transformer and rectifier would be required.

Correct Answer is. an A.C. transformer and rectifier would be required.

Explanation. NIL.

Question Number. 181. Two similar 12V batteries connected in parallel will produce.

Option A. 24V e.m.f. with the same capacity as each battery.

Option B. 12V e.m.f. with twice the capacity of each battery.

Option C. 24V e.m.f. with twice the capacity of each battery.

Correct Answer is. 12V e.m.f. with twice the capacity of each battery.

Explanation. NIL.

Question Number.		182. If a nicad battery overheats, it is an indication of.
Option A.	the generator voltage regulator setting is too low.
Option B.	the generator is not connected to the bus bar.
Option C.	thermal runaway.
Correct Answer is.		thermal runaway.
Explanation.	NIL.
Question Number.		183. When checking a nicad battery in situ for serviceability.
Option A.	a load is applied to the battery and the voltmeter reading noted.
Option B.	a hydrometer must be used.
Option C.	the electrical circuits must be isolated before installing shorting strips.
Correct Answer is.		a load is applied to the battery and the voltmeter reading noted.
Explanation.	NIL.
Question Number.		184. The output from an AC generator is taken from.
Option A.	slip rings.
Option B.	slip rings via commutator.
Option C.	connections on the stator.
Correct Answer is.		connections on the stator.
Explanation.	NIL.
Question Number.		185. Load sharing on a DC generation system is achieved by.
Option A.	circulating currents affecting the carbon pile for voltage trimming.
Option B.	the load differences causing torque signals to vary the engine speed.
Option C.	tachogenerators varying the generators outputs as the engine speed varies.
Correct Answer is.		circulating currents affecting the carbon pile for voltage trimming.
Explanation.	NIL.
Question Number.		186. If a nickel cadmium aircraft battery is not required for immediate
service, it should be stored.
Option A.	in the fully discharged condition.
Option B.	in a totally dry condition.
Option C.	in the fully charged condition.
Correct Answer is.		in the fully discharged condition.
Explanation.	CAIPs EEL/13 8.
Question Number.		187. The correct way to determine the state of charge of a
nickelcadmium battery is.
Option A.	by checking the specific gravity of each cell.
Option B.	by checking the voltage of each cell under load.
Option C.	by a complete discharge and a measured recharge.
Correct Answer is.		by a complete discharge and a measured recharge.
Explanation.	EEL/13 4.5.6.

Question Number.		188. A DC generator will be connected to the busbar after the RCCO
contacts close due to.
Option A.	increasing battery voltage.
Option B.	increasing generator voltage.
Option C.	a differential voltage of 0.5V battery voltage higher than generator.
Correct Answer is.		increasing generator voltage.
Explanation.	NIL.
Question Number.		189. Spillage of a lead acid electrolyte is detected by.
Option A.	indicating paper that turns red.
Option B.	indicating paper that turns blue.
Option C.	litmus paper that turns black.
Correct Answer is.		indicating paper that turns red.
Explanation.	Acid turns litmus paper red.
Question Number.		190. To restore electrolyte after spillage.
Option A.	add a mixture of acid and water of the same s.g. as that in the battery.
Option B.	add acid only.
Option C.	add distilled water only.
Correct Answer is.		add a mixture of acid and water of the same s.g. as that in the battery.
Explanation.	NIL.
Question Number.		191. When a DC generator fails, the pilot will receive the following
indications:.
Option A.	Rising voltage and current discharge with a red PFWL.
Option B.	An audio bell and red PFWL.
Option C.	Zero current on the ammeter and a red PFWL.
Correct Answer is.		Zero current on the ammeter and a red PFWL.
Explanation.	NIL.
Question Number.		192. The purpose of an inverter is to convert.
Option A.	DC to AC.
Option B.	AC to a higher frequency AC.
Option C.	AC to DC.
Correct Answer is.		DC to AC.
Explanation.	Aircraft Electrical Systems Pallett Page 66.
Question Number.		193. With a vibratingcontact type voltage regulator the adjustment of
generator voltage is carried out by.
Option A.	adjustment of voltage coil resistance.
Option B.	alteration of contact spring tension.
Option C.	alteration of the field resistance.

Correct Answer is.		alteration of contact spring tension.
Explanation.	Aircraft Electrical Systems, Pallett Page 12, and Aircraft Electricity and
Electronics Eismin Page 199.
Question Number.		194. Battery SG is measured using a.
Option A.	hygrometer.
Option B.	hypsometer.
Option C.	hydrometer.
Correct Answer is.		hydrometer.
Explanation.	NIL.
Question Number.		195. A battery for use on aircraft must have a capacity of.
Option A.	0.8.
Option B.	0.5.
Option C.	0.9.
Correct Answer is.		0.8.
Explanation.	NIL.	http://www.energysys.com/defense/documents/aft_manual.pdf
Question Number.		196. When connecting aircraft batteries, the last lead to connect is the.
Option A.	negative.
Option B.	positive earth.
Option C.	positive.
Correct Answer is.		negative.
Explanation.	Aircraft Electricity and Electronics Eismin Page 43.
Question Number.		197. Polarization in a cell is.
Option A.	the fact that hydrogen bubbles form on the ve plate.
Option B.	the fact that as a battery discharges, the ve plate’s potential approaches that of the
+ve plate’s.
Option C.	the establishing of a potential across the cell.
Correct Answer is.		the fact that hydrogen bubbles form on the ve plate.
Explanation.	NIL.
Question Number.		198. Battery capacity is checked by.
Option A.	discharging while maintaining the voltage constant by varying a resistor in the
circuit and checking the time to be discharged.
Option B.	discharging at a constant current and checking the time taken to reach the
discharged state.

Option C.	measuring the terminal voltage whilst on load and multiplying by the current
drawn.
Correct Answer is.		discharging while maintaining the voltage constant by varying a resistor in
the circuit and checking the time to be discharged.
Explanation.	Pallett Aircraft Electrical Systems Page 21.
Question Number.		199. The frequency of an AC generator is dependant on the.
Option A.	number of pairs of poles and the speed of the rotor.
Option B.	number of conductors and the field strength.
Option C.	field strength and the speed of the generator.
Correct Answer is.		number of pairs of poles and the speed of the rotor.
Explanation.	NIL.
Question Number.		200. To adjust the voltage output of an AC generator, whilst
maintaining constant frequency, it is necessary to.
Option A.	alter the reactance of the stator winding circuit.
Option B.	alter the field current.
Option C.	alter the driving speed.
Correct Answer is.		alter the field current.
Explanation.	Pallett Aircraft Electrical Systems Page 46.
Question Number.		201. In a paralleled AC generation system load sharing is for.
Option A.	reactive load only.
Option B.	real load only.
Option C.	real and reactive load.
Correct Answer is.		real and reactive load.
Explanation.	NIL.
Question Number.		202. Single phase components in a 3 phase system may be connected
between.
Option A.	phases A and B only.
Option B.	the phase and earth only.
Option C.	any phase and earth or between any two phases.
Correct Answer is.		any phase and earth or between any two phases.
Explanation.	NIL.
Question Number.		203. A frequency wild supply would be suitable for.
Option A.	instruments and navigation systems.
Option B.	deicing loads.
Option C.	3phase torque motors.

Correct Answer is.		deicing loads.
Explanation.	NIL.
Question Number.		204. Three 12V, 40Ah accumulators in series would give.
Option A.	36V 120Ah.
Option B.	12V 120Ah.
Option C.	36V 40Ah.
Correct Answer is.		36V 40Ah.
Explanation.	NIL.
Question Number.		205. Three 12V, 40Ah accumulators in parallel would give.
Option A.	12V 40Ah.
Option B.	12V 120Ah.
Option C.	36V 120Ah.
Correct Answer is.		12V 120Ah.
Explanation.	NIL.
Question Number.		206. An inverter can be an AC generator driven by.
Option A.	an AC motor.
Option B.	either an AC or DC motor.
Option C.	a DC motor.
Correct Answer is.		a DC motor.
Explanation.	NIL.
Question Number.		207. When mixing electrolyte for lead acid batteries.
Option A.	the method of mixing is unimportant.
Option B.	add acid to water.
Option C.	add water to acid.
Correct Answer is.		add acid to water.
Explanation.	NIL.
Question Number.		208. The RPM of a 6 pole, 400 Hz alternator is.
Option A.	6000.
Option B.	8000.
Option C.	4000.
Correct Answer is.		8000.
Explanation.	400/3 x 60.
Question Number.		209. The ratio between apparent power and true power is the.
Option A.	efficiency.

Option B.	power factor.
Option C.	power rating.
Correct Answer is.		power factor.
Explanation.	Pallett Aircraft Electrical Systems Page 3.
Question Number.		210. Apparent power is measured in.
Option A.	Volt Amps.
Option B.	Kilovolts.
Option C.	Watts.
Correct Answer is.		Volt Amps.
Explanation.	Pallett Aircraft Electrical Systems Page 35.
Question Number.		211. A NiCad battery consists of 19, 1.2 volt cells. What will be the
nominal battery output?.
Option A.	20V.
Option B.	24V.
Option C.	22V.
Correct Answer is.		22V.
Explanation.	NIL.
Question Number.		212. The preferred method of battery charging a NiCad battery is
constant.
Option A.	speed.
Option B.	current.
Option C.	voltage.
Correct Answer is.		current.
Explanation.	NIL.
Question Number.		213. When operating two AC generators unparalleled, the phase of
each.
Option A.	is unimportant.
Option B.	must be in opposition to one another.
Option C.	must be synchronized.
Correct Answer is.		is unimportant.
Explanation.	It says ‘UNparalleled’.
Question Number.		214. When the GPU is connected to the aircraft.
Option A.	it supplies essential services.
Option B.	it is not paralleled with the aircraft generator.

Option C. it is paralleled with the aircraft generator.

Correct Answer is. it is not paralleled with the aircraft generator.

Explanation. Nil.

Question Number. 215. A leadacid battery with 12 cells connected in series (noload voltage = 2.1 volts per cell) furnishes 10 amperes to a load of 2 ohms resistance. The internal resistance of the battery in this instance is.

Option A.	5.0 ohms.
Option B.	2.52 ohms.
Option C.	0.52 ohms.
Correct Answer is.		0.52 ohms.
Explanation.	OCV = 2.1 x 12 = 25.2 CCV = 10 x 2 = 20. Internal voltage drop = 5.2 V. Internal
R=V/I = 5.2/10 = 0.52.
Question Number.		216. The rating of an aircraft alternator is 40 KVA at PF 0.8 lagging.

Option A. The maximum load under all conditions is 40KVA.

Option B. The maximum load under all conditions is 40KW.

Option C. The maximum load permitted is 32KW.

Correct Answer is. The maximum load permitted is 32KW.

Explanation. PF = TP/AP 0.8 = TP/40 AP = 40 x 0.8 = 32 KW.

Question Number.		217. An I.D.G (integrated drive generator).
Option A.	does not require a CSDU.
Option B.	incorporates the alternator and CSD as one unit.
Option C.	has separate CSDU.
Correct Answer is.		incorporates the alternator and CSD as one unit.
Explanation.	Pallett Aircraft Electrical Systems Page 43.
Question Number.		218. A P.M.G (Permanent Magnet Generator) is a small built in
generator which.
Option A.	only rotates after starting.
Option B.	only rotates during starting.
Option C.	provides initial excitation.
Correct Answer is.		provides initial excitation.
Explanation.	NIL.
Question Number.		219. To parallel an alternator with another alternator the alternators
must have the same.
Option A.	frequency, voltage and phase relationship.
Option B.	frequency, RPM and speed.

Option C. frequency, RPM and phase relationship.

Correct Answer is. frequency, voltage and phase relationship.

Explanation. NIL.

Question Number.		220. Speed of an alternator may be controlled by.
Option A.	keeping engine rpm constant.
Option B.	varying the field current.
Option C.	CSDU (constant speed drive unit).
Correct Answer is.		CSDU (constant speed drive unit).
Explanation.	NIL.

Question Number. 221. Frequency wild’ alternators supply.

Option A. capacitive circuits.

Option B. inductive circuits.

Option C. resistive circuits.

Correct Answer is. resistive circuits.

Explanation. NIL.

Question Number.		222. The real load of an alternator is directly related to.
Option A.	output voltage.
Option B.	output shaft rpm.
Option C.	output shaft torque.
Correct Answer is.		output shaft torque.
Explanation.	Pallett Aircraft Electrical Systems Page 48.
Question Number.		223. How is initial voltage buildup ensured in a brushless generating
system, before full output is available from the voltage regulator?.
Option A.	Excitation form the DC busbars is automatically provided during the start
sequence.
Option B.	A switch must be operated by the crew to provide excitation form the dc busbar to
bring generator on line.
Option C.	Permanent magnets are mounted between the exciter field poles.
Correct Answer is.		Permanent magnets are mounted between the exciter field poles.
Explanation.	NIL.
Question Number.		224. Insulation resistance of electrical machines is.
Option A.	normally lower when the machine is hot.
Option B.	not affected by change of temperature of machine.
Option C.	normally higher when the machine is hot.
Correct Answer is.		normally higher when the machine is hot.
Explanation.	NIL.
Question Number.		225. The purpose of a thermistor in a brushless AC generator is to.
Option A.	keep the resistance of the rectifiers nearly constant at varying temperatures.

Option B. keep the exciter field resistance nearly constant at varying temperatures.

Option C. compensate for temperature changes in the main AC stator windings.

Correct Answer is. keep the exciter field resistance nearly constant at varying temperatures.

Explanation. Aircraft Electrical Systems, Pallett Page 45 and diagram.

Question Number.		226. The term ‘random paralleling’ means the incoming alternator’s
output voltage frequency and phase relationship is.
Option A.	not the same.
Option B.	the outputs are constant.
Option C.	the same.
Correct Answer is.		not the same.
Explanation.	NIL.
Question Number.		227. One lamp is connected across corresponding phases of two
alternators. They will be synchronised when.
Option A.	the lamp is maximum brightness.
Option B.	the lamp is extinguished.
Option C.	the lamp is either at maximum brightness or is extinguished.
Correct Answer is.		the lamp is extinguished.
Explanation.	NIL.
Question Number.		228. Automatic synchronising means that the incoming alternator’s

voltage and frequency.

Option A. can be synchronised using the two lamps provided at the system’s panel.

Option B. cannot be checked.

Option C. an be checked at the system’s electrical panel by selecting the relevant alternator.

Correct Answer is. an be checked at the system’s electrical panel by selecting the relevant

alternator.

Explanation. NIL.

Question Number.		229.	The danger of random paralleling is the possibility of.
Option A.	crash engagement.
Option B.	disconnection of the other alternators.
Option C.	ground power disconnection.
Correct Answer is.		crash engagement.
Explanation.	NIL.
Question Number.		230.	What is monitored in a constant speed drive?.
Option A.	Hi oil temperature and low oil press.

Option B. Low oil press and CSD speed.

Option C. Low oil temperature and low oil press.

Correct Answer is. Hi oil temperature and low oil press.

Explanation. NIL.

Question Number.		231. The CSD or IDG speed governor setting.
Option A.	is adjusted with the engine running.
Option B.	is adjusted with the engine stationary.
Option C.	is not allowed to be adjusted.
Correct Answer is.		is adjusted with the engine stationary.
Explanation.	NIL.
Question Number.		232. An external ground power supply can be used for.
Option A.	all normal services required by flight and ground crew.
Option B.	only the ground handling busbar services.
Option C.	only the emergency busbar services.
Correct Answer is.		all normal services required by flight and ground crew.
Explanation.	NIL.
Question Number.		233. The APU generator can normally be.
Option A.	connected in parallel with the aircraft’s main generators.
Option B.	used during flight as a back up supply if the main aircraft supply fails.
Option C.	connected in parallel with the ground power supply.
Correct Answer is.		used during flight as a back up supply if the main aircraft supply fails.
Explanation.	NIL.
Question Number.		234. The impedance on a run of coaxial cable is.
Option A.	inversely proportional to the length of cable.
Option B.	not affected by length of cable.
Option C.	proportional to the length of cable.
Correct Answer is.		not affected by length of cable.
Explanation.	NIL.	http://www.epanorama.net/documents/wiring/cable_impedance.html
Question Number.		235. Galley loads are supplied from the.
Option A.	ground service bus.
Option B.	main bus bar.
Option C.	battery bus bar.
Correct Answer is.		main bus bar.
Explanation.	NIL.

Question Number.		236. A nicad battery is stored in the.
Option A.	fully discharged condition.
Option B.	dry condition.
Option C.	fully charged condition.
Correct Answer is.		fully discharged condition.
Explanation.	NIL.
Question Number.		237. Transformer rectifier unit (TRUs) change.
Option A.	three phase AC to direct current.
Option B.	direct current to AC.
Option C.	single phase to direct current.
Correct Answer is.		single phase to direct current.
Explanation.	CAAIPS Leaflet 64 Page 13.
Question Number.		238. A frequency wild AC generator is used for.
Option A.	fluorescent lights.
Option B.	instruments.
Option C.	deicing loads.
Correct Answer is.		deicing loads.
Explanation.	NIL.
Question Number.		239. What should you do if the electrolyte is found to be low in one cell
of a lead acid battery?.
Option A.	Cell is defective, replace the battery.
Option B.	Replace the defective cell.
Option C.	Topup the individual cell with distilled water.
Correct Answer is.		Topup the individual cell with distilled water.
Explanation.	NIL.
Question Number.		240. What is the purpose of the diode on a contactor?.
Option A.	Prevent spikes.
Option B.	Prevent bounce.
Option C.	To prevent current going the wrong way.
Correct Answer is.		Prevent spikes.
Explanation.	It is known as a ‘flywheel diode’.
11B.07a. Equipment and Furnishings (ATA 25).

Question Number.		1.	Cargo and baggage compartments in which a fire is completely
confined come under.
Option A.	Class C.
Option B.	Class D.

Option C.	Class B.
Correct Answer is.		Class D.
Explanation.	JAR 25.857.
Question Number.		2.	Aircraft emergency escape slides are usually pressurised with.
Option A.	oxygen.
Option B.	helium.
Option C.	CO2.
Correct Answer is.		CO2.
Explanation.	All inflatable emergency equipment are inflated with CO2.
Question Number.		3.	Vertical projected separation between seat rows must be.
Option A.	4 inches.
Option B.	3 inches.
Option C.	5 inches.
Correct Answer is.		3 inches.
Explanation.	AWN 64 Para 4.3 (now in CAP747).
Question Number.		4.	Life jackets are inflated with cylinders of.
Option A.	CO2.
Option B.	air.
Option C.	Nitrogen.
Correct Answer is.		CO2.
Explanation.	CAIPs AL/312. 4 b All inflatable safety equipment use CO2.
Question Number.		5.	The minimum passenger aisle width for an aircraft with a seating
capacity of 20 or more is.
Option A.	15.
Option B.	dependant upon aircraft type.
Option C.	24.
Correct Answer is.		15.
Explanation.	JAR 25.815.
Question Number.		6.	When testing emergency slide bottles.
Option A.	any pin could be checked by connecting directly to ground.
Option B.	one pin must be grounded to the cartridge body at one time.
Option C.	all three pins must be shorted together and grounded to the cartridge body.
Correct Answer is.		all three pins must be shorted together and grounded to the cartridge body.
Explanation.	Testing of the cartridges is the same procedure as testing fire bottle cartridges.

CAIPs EEL/173.6.3 on.
Question Number.		7.	Where would you find information regarding galley equipment?.
Option A.	AWN 99.
Option B.	BCARs.
Option C.	ANO.
Correct Answer is.		AWN 99.
Explanation.	CAP 747.
Question Number.		8.	How often are life jackets inspected?.
Option A.	In accordance with the manufacturers specification.
Option B.	In accordance with the AMM.
Option C.	Every 12 months.
Correct Answer is.		In accordance with the manufacturers specification.
Explanation.	Leaflet 52 4.1 and CAIPs AL/312 4.1.
Question Number.		9.	Toilets must have a smoke detection.
Option A.	aural and visual warning in the main cabin.
Option B.	light in the cockpit.
Option C.	connected to a pump to pump the smoke out.
Correct Answer is.		light in the cockpit.
Explanation.	JAR 25.854 says a) or b).
Question Number.		10.	Where would you find information on liferaft deployment?.
Option A.	JARs.
Option B.	Cabin safety onboard card.
Option C.	Cabin operations manual.
Correct Answer is.		Cabin operations manual.
Explanation.	NIL.

Question Number. 11. How do you clean seat belts?.

Option A. With MEK.

Option B. With white spirit.

Option C. With warm water with low alkalinity soap.

Correct Answer is. With warm water with low alkalinity soap.

Explanation. NIL.

Question Number.		12.	After a successful ditching, the liferafts deployment will.
Option A.	be rapid and obvious with easily and readily displayed instructions adjacent to the
liferafts.
Option B.	be briefed by the cabin crew.
Option C.	have detailed instructions in a booklet in a seat pocket.
Correct Answer is.		be rapid and obvious with easily and readily displayed instructions
adjacent to the liferafts.
Explanation.	NIL.
Question Number.		13.	Type and Quantity of emergency equipment to be carried is
specified in which document?.
Option A.	CAAIPs Leaflet 57.
Option B.	Schedule 4 of the ANO.
Option C.	Airworthiness Notice 79.
Correct Answer is.		Schedule 4 of the ANO.
Explanation.	NIL.
Question Number.		14.	Where the aircraft passenger seating capacity exceeds 149 but less
than 200 then:.
Option A.	1 megaphone is required.
Option B.	3 megaphones are required.
Option C.	2 megaphones are required.
Correct Answer is.		2 megaphones are required.
Explanation.	JAR Ops 1.810.
Question Number.		15.	Megaphones must be stowed so they can withstand an inertia force
of.
Option A.	15g.
Option B.	9g.
Option C.	12g.
Correct Answer is.		9g.
Explanation.	JAR 25.561 and 25.1421.
Question Number.		16.	The cylinder in a life jacket is inflated using.
Option A.	CO2.
Option B.	nitrogen.
Option C.	compressed air.
Correct Answer is.		CO2.
Explanation.	AL/312 2.
11B.07b. Equipment and Furnishings (ATA 25).

Question Number.		1.	What is the minimum separation between a seat back cushion and

another seat or fixed structure?.

Option A.	28 inches.
Option B.	24 inches.
Option C.	26 inches.
Correct Answer is.		26 inches.
Explanation.	AWN 64 Para 4.1.
Question Number.		2.	Cargo nets are manufactured from.
Option A.	hessian.
Option B.	nylon.
Option C.	polypropylene.
Correct Answer is.		nylon.
Explanation.	Cargo nets are made from nylon or polyester (not polypropylene).
Question Number.		3.	A galley trolley will be designed to.
Option A.	does not matter as the trolleys move.
Option B.	not exceed the floor limits more than 3 times in one hour.
Option C.	not exceed the floor loading limits.
Correct Answer is.		not exceed the floor loading limits.
Explanation.	AWN 99 para 5.6.
Question Number.		4.	When loading a cargo aircraft.
Option A.	the weight limits of the aircraft could be exceeded under careful monitored
circumstances.

Option B. the CofG limits of the aircraft could be exceeded under careful monitored circumstances.

Option C. the manufacturer specifies the maximum floor loads.

Correct Answer is. the manufacturer specifies the maximum floor loads.

Explanation. NIL.

Question Number. 5. Galley equipment which does not need electrical power is called.

Option A. controlled equipment.

Option B. uncontrolled equipment.

Option C. minimum equipment.

Correct Answer is. uncontrolled equipment.

Explanation. AWN 99 4.1, 4.2.

Question Number. 6. Galley trolleys must have placards indicating.

Option A. location, position, flight number.

Option B. maximum weight, position, flight number.

Option C. Must be stowed for takeoff, landing and turbulence.

Correct Answer is. Must be stowed for takeoff, landing and turbulence.

Explanation. AWN 99 5.11.

Question Number.		7.	PTV type entertainment equipment.
Option A.	has no capacity for digital information processing and transmitting.
Option B.	is installed with seat electronic unit and multiplexing techniques.
Option C.	is not the part of maintenance schedule.
Correct Answer is.		is installed with seat electronic unit and multiplexing techniques.
Explanation.	PTV = Personal Television.
Question Number.		8.	Hot fluids in an aircraft galley must have closed container lids at
temperatures above.
Option A.	65°C.
Option B.	55°C.
Option C.	45°C.
Correct Answer is.		45°C.
Explanation.	CAP 455 AWN No.99 5.2.
Question Number.		9.	With regard to forward/rearward passenger seat installation.

Option A. you can only fit seats facing forward.

Option B. you can fit seats facing forward or rearward.

Option C. you can only fit seats as stated in the Declaration of Design and Performance (DPP).

Correct Answer is. you can only fit seats as stated in the Declaration of Design and

Performance (DPP).

Explanation. AWN 64 Para.2.2.

Question Number.		10.	Attendant call is achieved by pressing a button on the passenger
service unit (PSU). To reset the light.
Option A.	the button is pushed again.
Option B.	the button is pulled out.
Option C.	a reset switch on the attendants panel is operated.
Correct Answer is.		the button is pushed again.
Explanation.	NIL.
Question Number.		11.	On large aeroplanes, containerised cargo is held down by.
Option A.	rope.
Option B.	side cart guides and fore and aft latches.

Option C.	netting.
Correct Answer is.		side cart guides and fore and aft latches.
Explanation.	NIL.
Question Number.		12.	A galley catering trolley with electrics is classed as.
Option A.	an uncontrolled item.
Option B.	a controlled item.
Option C.	neither, as it is removable.
Correct Answer is.		a controlled item.
Explanation.	AWN99 Para 4.1.
Question Number.		13.	The minimum vertical projected separation between seat rows is.
Option A.	7 inches.
Option B.	3 inches.
Option C.	5 inches.
Correct Answer is.		3 inches.
Explanation.	CAP 747 GR No.2 Dimension C.
11B.08a. Fire Protection (ATA 26).
Question Number.		1.	On pulling the fire handle, the aural warning.
Option A.	goes off, the light goes off, hydraulics, bleed air and generator goes off.
Option B.	stays on, the light extinguishes, the generator goes off line.
Option C.	goes off, the light remains on, the generator goes off line.
Correct Answer is.		goes off, the light remains on, the generator goes off line.
Explanation.	B757 AMM.
Question Number.		2.	Engine wing firebottles should be charged with nitrogen at 15°C
to.
Option A.	1250 psi.
Option B.	600 psi.
Option C.	1500 psi.
Correct Answer is.		600 psi.

Explanation. Transport Category Aircraft Systems Page 97. Pallett Aircraft Electrical Systems 3rd EditionPage 166″;.

Question Number. 3. A fire that can be put out by a crew member in a cargo bay is in a.

Option A. class A compensation.

Option B. class D compensation.

Option C. class B compensation.

Correct Answer is. class B compensation.

Explanation. Transport Category Aircraft Systems Page 93 and JAR 25.857.

Question Number.		4.	In a capacitive fire detection system, if.
Option A.	there is a break, the system will not work.
Option B.	there is a break, the system will work but not test satisfactory.
Option C.	there is a short to earth, the system will work but not test satisfactory.
Correct Answer is.		there is a break, the system will work but not test satisfactory.
Explanation.	CAIPs AL/39 Para 4.2.1.
Question Number.		5.	A fire detection zone wiring can pass through another fire zone
when.

Option A. the system and the extinguishing system are the same.

Option B. the system is different but the extinguishant is the same.

Option C. the system is the same but the extinguishant is different.

Correct Answer is. the system and the extinguishing system are the same.

Explanation. JAR 25 1203 f2.

Question Number.	6.	When a fire test on a Systron Donor fire detector system is carried
out.

Option A. a signal passes through the unbroken centre conductor to produce the warning.

Option B. it checks the integrity of the contacts.

Option C. the signal passes through the centre and back through the outer to give warning.

Correct Answer is. it checks the integrity of the contacts.

Explanation. Jeppesen a+p Technician Airframe Textbook page 116 b describes a systrondonner system.This is the same system the CAA call a sensor/responder system in CAIPs EEL/17 para 2.2.4 in para d.

Question Number.		7.	When inspecting lavatory installations.
Option A.	the ashtray should not be located close to the toilet paper holder.
Option B.	No Smoking’ sign should be fitted next to the ashtrays only.
Option C.	the ashtray must be made of a thermoplastic material.
Correct Answer is.		the ashtray should not be located close to the toilet paper holder.
Explanation.	AWN 83 5.4.

Question Number. 8. Lavatories must have, in the disposal container.

Option A. Freon extinguisher with white ball markings indicating when discharged.

Option B. Freon extinguisher with black ball markings indicating when discharged.

Option C. water/glycol extinguisher with white ball markings indicating when discharged. Correct Answer is. Freon extinguisher with black ball markings indicating when discharged. Explanation. The temperature sensitive strip changes color from white to black at the indicated temp. B737 MM 262400 pg1. JAR 25854 a, b.

Question Number.		9.	A fire detection loop must be capable of.
Option A.	using master warning visual and aural signals.
Option B.	detecting fire/overheat condition within 5 seconds and extinguishing such that
after 30 seconds the condition is no longer present.
Option C.	using master warning visual signals only.
Correct Answer is.		using master warning visual and aural signals.
Explanation.	Aircraft Electrical Systems Pallett Page 163.
Question Number.		10.	A SystronDonner fire detection system uses.
Option A.	helium gas.
Option B.	oxygen gas.
Option C.	nitrogen gas.
Correct Answer is.		helium gas.
Explanation.	Transport Category Aircraft Systems. Jeppesen Page 922.
Question Number.		11.	A toilet is fitted with thermal protection.
Option A.	to protect against freezing at altitude.
Option B.	to protect against the dangers of smoke and fire in the event of an overheat.
Option C.	to protect against continuous flushing.
Correct Answer is.		to protect against the dangers of smoke and fire in the event of an
overheat.
Explanation.	AWN 57 Para.2.3.
Question Number.		12.	What external warning is there for an APU fire?.
Option A.	Aural.
Option B.	Both aural and a red light.
Option C.	Red light.
Correct Answer is.		Both aural and a red light.
Explanation.	AL/326 2.8.
Question Number.		13.	Engine fire bottle pressure switches are operated by.
Option A.	AC or DC.
Option B.	DC.
Option C.	AC.
Correct Answer is.		DC.
Explanation.	NIL.
Question Number.		14.	Fire tests on aircraft internal furnishings must be carried out.

Option A. every two years.

Option B. every five years.

Option C. only when equipment items fail random tests.

Correct Answer is. only when equipment items fail random tests.

Explanation. NIL.

Question Number.		15.	A cockpit check on the engine firewire system is a.
Option A.	calibration check.
Option B.	continuity check.
Option C.	function check.
Correct Answer is.		continuity check.
Explanation.	B747400 AMM.
Question Number.		16.	When the fire handle is operated it.
Option A.	cuts off fuel and hydraulics. Generator remains on line to provide electrical
power.
Option B.	cuts off field current, hydraulics and fuel and operates fire extinguishers.
Option C.	operates fire extinguisher only.
Correct Answer is.		cuts off field current, hydraulics and fuel and operates fire extinguishers.
Explanation.	NIL.	http://www.b737.org.uk/fireprotection.htm
Question Number.		17.	What is the contamination monitor for, in a Systron Donner fire
detection system?.
Option A.	Volts drop.
Option B.	Dirty contacts.
Option C.	Integrity comparator.
Correct Answer is.		Dirty contacts.
Explanation.	EEL/17 2.2.4 (d).
Question Number.		18.	Fireproofing of cabin material should be done.
Option A.	every 2 years.
Option B.	when a sample fails.
Option C.	every 5 years.
Correct Answer is.		when a sample fails.
Explanation.	NIL.
Question Number.		19.	What test is carried out to ensure serviceability of a squib?.
Option A.	Bottles are fired.
Option B.	Safety ohmmeter is used to check voltage.
Option C.	A continuity check.
Correct Answer is.		A continuity check.
Explanation.	Trick question. A continuity check is carried out with a safety ohmmeter. But a
safety ohmmeter does not check voltage.
Question Number.		20.	In a gas firewire system, what causes the firewire caption to come

on when heat is applied?.
Option A.	Continuity.
Option B.	Pressure.
Option C.	Capacitance increase.
Correct Answer is.		Pressure.
Explanation.	Jeppesen A&P Airframe Technician Textbook Page 168 Lindberg System.
Question Number.		21.	Toilet fire detection issues can be found in.
Option A.	AWN 83.
Option B.	CAAIPs.
Option C.	AWN 80.
Correct Answer is.		AWN 83.
Explanation.	AWN 83 now transferred to CAP 747 GR no 20.
Question Number.		22.	The outside casing of a firewire has.
Option A.	same potential as ground.
Option B.	28VDC potential above ground.
Option C.	115VDC potential above ground.
Correct Answer is.		same potential as ground.
Explanation.	NIL.
Question Number.		23.	A cargo compartment which will contain a fire itself and ventilate
is a class.
Option A.	A.
Option B.	D.
Option C.	C.
Correct Answer is.		D.
Explanation.	JAR 25.857.
Question Number.		24.	Smoke detectors consist of a.
Option A.	lamp detecting 2% smoke.
Option B.	photoelectric cell detecting 10% smoke.
Option C.	photoelectric cell detecting 2% smoke.
Correct Answer is.		photoelectric cell detecting 10% smoke.
Explanation.	Transport Category Aircraft Systems Page 9.2.
Question Number.		25.	In a toilet smoke condition, what would be the indication?.
Option A.	Either a light or an audible warning in the cabin.
Option B.	Light in the cabin.
Option C.	Audible warning in the cabin.
Correct Answer is.		Either a light or an audible warning in the cabin.
Explanation.	JAR 25.854.

Question Number.		26.	What do you check when carrying out an insulation check on a
continuous firewire loop?.
Option A.	The firewire, sensor & controller.
Option B.	The outside of the firewire to earth.
Option C.	The firewire.
Correct Answer is.		The firewire.
Explanation.	Pallets Aircraft Electrical System Third Edition page 163 fig 10.17.
Question Number.		27.	When the firehandle switch is pulled, a.
Option A.	red warning light stays on. Generator, hydraulics & fuel stays on.
Option B.	red warning light goes off. Generator goes offline.
Option C.	red warning light stays on. Generator, hydraulics, & fuel is cut off.
Correct Answer is.		red warning light stays on. Generator, hydraulics, & fuel is cut off.
Explanation.	B737 MM. Warning light is an indication of fire. Light goes off only when fire is
extinguished.
11B.08b. Fire Protection (ATA 26).
Question Number.		1.	What are the minimum number of fire bottles in a cabin with 201
300 people?.
Option A.	3 BCF.
Option B.	4 Fire Extinguishers.
Option C.	4 Methyl Bromide.
Correct Answer is.		4 Fire Extinguishers.
Explanation.	JAR OPS 1.790, AWN 60.
Question Number.		2.	How often do handheld extinguishers have to be weighed?.
Option A.	Biannually.
Option B.	Every 5 years.
Option C.	Annually.
Correct Answer is.		Annually.
Explanation.	CAIPs AL/310 para 6.3 and 7.1.
Question Number.		3.	The weight of an extinguisher is stamped.
Option A.	on bracket.
Option B.	on head fitting.
Option C.	on base of body.
Correct Answer is.		on head fitting.
Explanation.	CAIPs AL/310, para 6.3.

Question Number.		4.	How can fire extinguisher be identified as being used?.
Option A.	Check the telltale wire.
Option B.	Weighed.
Option C.	Check the pressure.
Correct Answer is.		Weighed.
Explanation.	AL/310 6.3.
Question Number.		5.	Portable fire extinguishers are operated by.
Option A.	turning upside down and squeeze button/trigger.
Option B.	breaking the tell tale/tamperproof seal then operated by the handle.
Option C.	one single operation until fire extinguisher is empty.
Correct Answer is.		breaking the tell tale/tamperproof seal then operated by the handle.
Explanation.	NIL.
Question Number.		6.	How many fire extinguishers are required on an aircraft with 501
passengers?.
Option A.	6.
Option B.	7.
Option C.	5.
Correct Answer is.		7.
Explanation.	JAR 25.851.
Question Number.		7.	How many fire extinguishers are required on an aircraft having 401

500 passengers?.

Option A.6.

Option B.8.

Option C. 5. Correct Answer is. 6. Explanation. JAR 25.851.

Question Number.		8.	CO2 fire extinguishers are used on.
Option A.	all fires in fuselage.
Option B.	engines only.
Option C.	baggage holds only.
Correct Answer is.		all fires in fuselage.
Explanation.	AL/310 3.3.

11B.09. Flight Controls (ATA 27).

Question Number.		1.	In an aircraft flying control system employing servotabs, the
installation of external ground locks to the main control surface.
Option A.	would not prevent movement of the control column.
Option B.	is unnecessary since the system is irreversible and therefore the control surface
cannot be displaced by the wind.
Option C.	would also prevent movement of the control column.
Correct Answer is.		would not prevent movement of the control column.
Explanation.	Aircraft Flight Barnard and Philpot, Second Edition Page 253 (first line).
Question Number.		2.	A full time yaw damper system detects.
Option A.	band pass frequencies.
Option B.	all frequencies.
Option C.	only low frequencies.
Correct Answer is.		band pass frequencies.
Explanation.	Pallett Automatic Flight Control 4th Edition Page 222 on.
Question Number.		3.	With respect to flight spoilers, they.
Option A.	can operate both on the ground and in flight.
Option B.	only operate on the ground.
Option C.	only operate in flight.
Correct Answer is.		can operate both on the ground and in flight.
Explanation.	Flight spoilers are used in flight and on the ground. However Ground spoilers can

ONLY be used on the ground. Jeppesen Transport Category Aircraft Systems Page 56. Pallett Automatic Flight Control 2nd Edition Page 51.

Question Number.		4.	The bearing used in a fibre pulley is.
Option A.	a ball bearing.
Option B.	a roller bearing.
Option C.	a plain bearing.
Correct Answer is.		a ball bearing.
Explanation.	Ball bearings are used in fibre pulleys.
Question Number.		5.	When the primary stops fitted to a control run have been contacted.
Option A.	a clearance exists at the secondary stops.
Option B.	the secondary stops have been overridden.
Option C.	the secondary stops will just be in contact.
Correct Answer is.		a clearance exists at the secondary stops.

Explanation. The clearance is on the secondary stops.

Question Number.	6.	Excessive wear on both sides of the control cable pulley groove is
evidence of.

Option A. excessive cable tension.

Option B. pulley misalignment.

Option C. cable misalignment.

Correct Answer is. pulley misalignment.

Explanation. Jeppesen A&P Technician Airframe Textbook Page 145.

Question Number.	7.	A universal protractor used to measure degrees of aileron travel
should be zeroed.

Option A. when the aircraft is in level flight attitude.

Option B. with the aileron in the neutral position.

Option C. with the aileron in the down position.

Correct Answer is. with the aileron in the neutral position.

Explanation. Jeppesen A&P technician Airframe Textbook Page 140.

Question Number. 8. A flying control static friction check.

Option A. can only be carried out during flight.

Option B. demonstrates the force the pilot requires to overcome system inertia and move the

controls.

Option C. will demonstrate that a high force is always necessary to operate nonpowered controls.

Correct Answer is. demonstrates the force the pilot requires to overcome system inertia and move the controls.

Explanation. A static friction check demonstrates the force the pilot requires to overcome system inertia and move the controls.

Question Number.		9.	What is an aileron balance cable for?.
Option A.	To allow the cable to be tensioned.
Option B.	To correct for wing heaviness.
Option C.	To allow aircraft to fly hands off.
Correct Answer is.		To allow the cable to be tensioned.
Explanation.	Jeppesen A&P technician Airframe Textbook Page 127.
Question Number.		10.	With the elevator trim wheel adjusted fully aft. (nose up), range of
movement of the elevator is restricted.
Option A.	would make no difference to the movement.

Option B. for ‘down’ travel movement.

Option C. for ‘up’ travel movement.

Correct Answer is. for ‘up’ travel movement.

Explanation. Use of trim reduces the associated control movement direction range.

Question Number.		11.	On the ground, spoilers/speedbrakes deploy to.
Option A.	15°.
Option B.	30°.
Option C.	60°.
Correct Answer is.		60°.

Explanation. Transport Category Aircraft Systems Jeppesen Page 56. In the air 30 degrees and a further 15 degrees with ailerons.

Question Number.		12.	A horn balance on a control will.
Option A.	increase degree of movement at high speed.
Option B.	decrease degree of movement at low speed.
Option C.	decrease degree of movement at high speed.
Correct Answer is.		increase degree of movement at high speed.
Explanation.	For a given pilot effort, the horn balance increases movement.
Question Number.		13.	In normal flight, if the control column is pulled back, a servo tab
fitted to the elevator will.
Option A.	move up.
Option B.	remain in line with the elevator.
Option C.	move down.
Correct Answer is.		move down.
Explanation.	NIL.
Question Number.		14.	In normal flight, if the control wheel is moved to the left, then the
aileron on the right wing will.
Option A.	decrease the angle of attack of the right hand wing.
Option B.	increase the angle of attack of the right hand wing.
Option C.	keep the angle of attack of the right wing constant.
Correct Answer is.		increase the angle of attack of the right hand wing.
Explanation.	Could also be answered ‘b’, depending on whether it means the cause or the effect.

The downgoing aileron (the right one) has an increase in AoA locally, which makes the wing lift, thusreducing the AoA of the wing as a whole. Choose your interpretation.

Question Number. 15. On an aircraft fitted with elevons in normal flight, if a column is moved forward, the elevons will.

Option A. remain stationary.

Option B. both move down.

Option C. both move up.

Correct Answer is. both move down.

Explanation. NIL.

Question Number.	16.	To avoid moments bending the root of the wing, the aircraft will be
fitted with.

Option A. integrated fuel monitoring system.

Option B. symmetrical flight control trim.

Option C. automatic trim control for controlled turns and rudder movements.

Correct Answer is. symmetrical flight control trim.

Explanation. Probably referring to Load Alleviation Function. Jeppesen Transport Category Aircraft Systems Page 529.

Question Number.		17.	A yaw damper gain could be fitted with.
Option A.	decreases sensitivity for decreased speed.
Option B.	increased sensitivity for increased speed.
Option C.	decreases sensitivity for increased speed.
Correct Answer is.		increased sensitivity for increased speed.
Explanation.	Automatic Flight Control, Pallett Page 223.
Question Number.		18.	In an aircraft system employing balance tabs, the installation of
external ground locks between the control surface and the balance tabs.
Option A.	would prevent the movement of the control column.
Option B.	is unnecessary since the system is irreversible.
Option C.	would not prevent the movement of the control column.
Correct Answer is.		would prevent the movement of the control column.
Explanation.	A+P Technician Airframe Textbook Page 129.
Question Number.		19.	The two switches for pitch trim are located.
Option A.	on the control column acting like an ‘AND’ switch.
Option B.	on the control column with the captain having priority over the First Officer.
Option C.	on the control column acting like an ‘OR’ switch.
Correct Answer is.		on the control column acting like an ‘AND’ switch.
Explanation.	The ‘split’ trim switch has one half closing a relay to ‘enable’ power to the trim

motor, and to engage the clutch. The other switch half is to supply the power to the motor. Both must be operated together, to operate the trim.

Question Number. 20. If the flaps are sluggish or erratic on final approach, the possible

cause may be.
Option A.	flap tracks out of rigging.
Option B.	bearing seized.
Option C.	flap motor internal leakage.
Correct Answer is.		flap motor internal leakage.
Explanation.	Jeppesen Transport Category Aircraft Systems Page 519.
Question Number.		21.	In fully Fly By Wire aircraft, wing root bending moments are
reduced by.
Option A.	transfer of fuel from one wing tank to another.
Option B.	operation of the elevator.
Option C.	symmetrical application of ailerons.
Correct Answer is.		symmetrical application of ailerons.
Explanation.	CAIPs EEL/12.
Question Number.		22.	Yaw damping rate changes with.
Option A.	airspeed.
Option B.	flap position.
Option C.	altitude.
Correct Answer is.		airspeed.
Explanation.	Avionic Fundamentals page 292.
Question Number.		23.	What is the main purpose of a frize aileron?.
Option A.	Decrease drag on the up going wing.
Option B.	Help pilot overcome aerodynamic loads.
Option C.	Increase drag on the up going wing.
Correct Answer is.		Decrease drag on the up going wing.
Explanation.	The Frise aileron increases drag on the upgoing aileron, which is on the
downgoing wing. And Vise versa on the other aileron.
Question Number.		24.	What happens to a hydraulically operated flight control surface
when pressure is removed?.
Option A.	Droop.
Option B.	Remain in last position.
Option C.	Go to neutral.
Correct Answer is.		Droop.

Explanation. “The drop in pressure releases a valve which lets the fluid pass easily from one side of actuator piston to the

other. This is to prevent a hydraulic lock and permit manual reversion. Surfaces behave like manually controlled surfaces.”

Question Number. 25. Oscillation and hunting of flight control surface are prevented by.

Option A. fitting a tachogenerator.

Option B. feedback from the servo motor.

Option C. feedback from control surface.

Correct Answer is. fitting a tachogenerator.

Explanation. Automatic Flight Control by E.H.J.Pallett 3rd edition, page157 (feedback, para 2).

Question Number.		26.	Stick shaker activates at a speed which is above the stalling speed
by.
Option A.	4%.
Option B.	7%.
Option C.	10.321%.
Correct Answer is.		7%.
Explanation.	Aircraft Electricity and Electronics, Eismin 5th Edition Page370.
Question Number.		27.	A wing mounted stall warning vane.
Option A.	moves down at impending stall.
Option B.	moves up at impending stall.
Option C.	gives a visual indication of impending stall.
Correct Answer is.		moves up at impending stall.
Explanation.	NIL.
Question Number.		28.	During an autopilot controlled turn.
Option A.	ailerons, rudder and THS will move.
Option B.	ailerons and rudder will move.
Option C.	ailerons, rudder and elevators will move.
Correct Answer is.		ailerons, rudder and elevators will move.
Explanation.	NIL.
Question Number.		29.	On a full flybywire system, a speedbrake screwjack servomotor
is controlled by the.
Option A.	flight augmentation computer.
Option B.	flight control computer.
Option C.	flight management and guidance computer.
Correct Answer is.		flight control computer.
Explanation.	Transport Category Aircraft Systems Page 526.
Question Number.		30.	In a flybywire aircraft, what controls the roll spoilers?.
Option A.	Flight control computer.
Option B.	Flight augmentation computer.
Option C.	Flight management computer.
Correct Answer is.		Flight control computer.

Explanation.	Transport Category Aircraft Systems Page 526.
Question Number.		31.	Mass balance weights are used to.
Option A.	balance the trailing edge of flying control surfaces.
Option B.	counteract flutter on control surfaces.
Option C.	balance the tabs.
Correct Answer is.		counteract flutter on control surfaces.
Explanation.	NIL.
Question Number.		32.	Active load control involves.
Option A.	limiting the deflection of control surface with airspeed.
Option B.	intervention & monitoring the human pilot.
Option C.	varying lift force to control vertical movement of the aircraft.
Correct Answer is.		varying lift force to control vertical movement of the aircraft.
Explanation.	Automatic Flight Control Pallett and Coyle Page 292.
Question Number.		33.	Active load control uses.
Option A.	elevator and aileron.
Option B.	aileron and spoiler.
Option C.	elevator and stab.
Correct Answer is.		aileron and spoiler.
Explanation.	Transport Category Aircraft Systems 529 (Load Alleviation Function).
Question Number.		34.	The purpose of the autopilot servomotor torque setting is to.

Option A. protect the servo motor.

Option B. damp the system oscillation.

Option C. prevent control surface runaway.

Correct Answer is. prevent control surface runaway.

Explanation. Automatic Flight Control Pallett and Coyle.

Question Number.		35.	In a fully Fly By Wire Aircraft, ground spoilers are deployed
automatically when the aircraft is on ground and.
Option A.	brakes are deployed.
Option B.	thrust reversers are deployed.
Option C.	weight on ground switch is activated.
Correct Answer is.		thrust reversers are deployed.
Explanation.	A320 Ground Spoiler Logic diagram also.
http://www.b737.org.uk/flightcontrols.htm.
Question Number.		36.	In a fully Fly By Wire aircraft, rudder trim is nulled by the.
Option A.	Flight Augmentation Computers.
Option B.	electric flight control unit.
Option C.	Flight Guidance and Management Computer.

Correct Answer is. Flight Augmentation Computers.

Explanation. Transport Category Aircraft Systems Page 526.

Question Number.		37.	Aileron input is fed into the yaw damper system to.
Option A.	prevent nose pitching down.
Option B.	prevent nose pitching up.
Option C.	prevent adverse yaw in a turn.
Correct Answer is.		prevent adverse yaw in a turn.
Explanation.	NIL.
Question Number.		38.	Pitch trimming in autopilot is initiated by.
Option A.	C of G movement.
Option B.	pitch of aircraft in cruise.
Option C.	continued pitch input.
Correct Answer is.		continued pitch input.
Explanation.	If the elevator is deflected over a long time, the AFCS trims the horizontal
stabilizer to eliminate the elevator deflection load.
Question Number.		39.	Differential aileron control will.
Option A.	cause a nose up moment.
Option B.	prevent yawing in conjunction with rudder input.
Option C.	cause a nose down moment.
Correct Answer is.		prevent yawing in conjunction with rudder input.
Explanation.	NIL.
Question Number.		40.	On a flybywire aircraft, what controls stabilizer trim?.
Option A.	SEC.
Option B.	ELAC and SEC.
Option C.	ELAC.
Correct Answer is.		ELAC and SEC.
Explanation.	Transport Category Aircraft Systems 523.
Question Number.		41.	In an automatic flight control system, when may the yaw damper
be applied?.
Option A.	During manual control only.
Option B.	During either manual or automatic control.
Option C.	During automatic control only.
Correct Answer is.		During either manual or automatic control.
Explanation.	Automatic Flight Control Pallett Page 222 226.
Question Number.		42.	Flutter can be prevented by.
Option A.	mass balance.
Option B.	trim tabs.
Option C.	balance panels.

Correct Answer is.		mass balance.
Explanation.	NIL.
Question Number.		43.	In a fully fly by wire system, if the elevator loses all electrical
power.
Option A.	servos lock at last position.
Option B.	servos remain stationary and provide damping.
Option C.	servos move to neutral and lock.
Correct Answer is.		servos remain stationary and provide damping.
Explanation.	A319/A320/A321 Flight Crew Operating Manual.
Question Number.		44.	In an auto trim system, for the trim system to operate.
Option A.	operation of the trim controls is required.
Option B.	autopilot need not be engaged.
Option C.	autopilot must be engaged.
Correct Answer is.		autopilot need not be engaged.
Explanation.	Automatic Flight Control, Pallett Page 213 218.
Question Number.		45.	In an autopilot coordinated turn, when the turn angle is reached.
Option A.	both ailerons are down.
Option B.	one is up one is down.
Option C.	the ailerons are faired.
Correct Answer is.		the ailerons are faired.
Explanation.	Due to the aircraft’s neutral lateral stability, the ailerons are neutralised (faired)
and the aircraft will hold the turn.
Question Number.		46.	How is automatic angle of attack protection provided?.
Option A.	Fast/Slow indication.
Option B.	Reduce flap deployment.
Option C.	Autothrottle applying more power.
Correct Answer is.		Autothrottle applying more power.
Explanation.	NIL.
Question Number.		47.	A single failure of fly by wire.
Option A.	will reduce the operational height and speed.
Option B.	will limit the flight profile.
Option C.	has no effect on the aircraft’s operation.
Correct Answer is.		has no effect on the aircraft’s operation.
Explanation.	NIL.
Question Number.		48.	Flybywire load alleviation function in turbulent weather
conditions will result in.
Option A.	spoiler moving symmetrically upward.

Option B. ailerons moving symmetrically upward.

Option C. ailerons and spoiler moving symmetrically upward.

Correct Answer is. ailerons and spoiler moving symmetrically upward.

Explanation. NIL.

Question Number.		49.	Autotrim will switch to ‘slow’ when.
Option A.	flaps are retracted.
Option B.	landing gear up and locked.
Option C.	flaps are extended.
Correct Answer is.		flaps are retracted.
Explanation.	NIL.
Question Number.		50.	How is the stabiliser automatically controlled in normal manual
operation?.
Option A.	Mach/Speed Trim.
Option B.	Pitch Trim.
Option C.	Electric Trim.
Correct Answer is.		Mach/Speed Trim.
Explanation.	NIL.
Question Number.		51.	Spoiler position feedback is provided by a.
Option A.	a S.C.M.
Option B.	an R.V.D.T.
Option C.	a microswitch.
Correct Answer is.		an R.V.D.T.
Explanation.	NIL.
Question Number.		52.	Rudder ‘Q’ limiting.
Option A.	restricts rudder movement with increase in airspeed.
Option B.	increases rudder movement with increase in airspeed.
Option C.	increases feel as airspeed increases.
Correct Answer is.		restricts rudder movement with increase in airspeed.
Explanation.	NIL.
Question Number.		53.	Elevons combine the functions of both.
Option A.	elevator and aileron.
Option B.	rudder and aileron.
Option C.	rudder and elevator.
Correct Answer is.		elevator and aileron.
Explanation.	Jeppesen A&P Technician Airframe Textbook Page 116 Fig 136.
Question Number.		54.	A differential aileron system is designed to.

Option A.	minimise flutter.
Option B.	prevent adverse yaw.
Option C.	compensate for aileron reversal.
Correct Answer is.		prevent adverse yaw.
Explanation.	NIL.
Question Number.		55.	An artificial feel system is required.
Option A.	for power assisted control systems.
Option B.	for proportional control systems.
Option C.	for power operated control systems.
Correct Answer is.		for power operated control systems.
Explanation.	NIL.
Question Number.		56.	A tandem P.F.C.U.
Option A.	has the actuator rams coaxial.
Option B.	has two control surfaces under its control.
Option C.	has the actuator rams parallel.
Correct Answer is.		has the actuator rams coaxial.
Explanation.	NIL.	http://www.tpub.com/content/engine/14105/css/14105_157.htm
Question Number.		57.	What is the purpose of a differential Frise aileron?.
Option A.	To decrease the drag and decrease the rate of yaw and turn.
Option B.	Has no effect on rate of yaw and turn.
Option C.	To increase the drag to increase the rate of yaw and turn.
Correct Answer is.		To increase the drag to increase the rate of yaw and turn.
Explanation.	NIL.
Question Number.		58.	Active load control uses.
Option A.	elevator and stab.
Option B.	elevator and ailerons.
Option C.	ailerons and spoilers.
Correct Answer is.		ailerons and spoilers.
Explanation.	NIL.
Question Number.		59.	An artificial feel system is necessary in a powered flying control
system to.
Option A.	increasing the sensitivity of the control system.
Option B.	provide the pilot with simulated stick forces.
Option C.	prevent overloading of the power control units.
Correct Answer is.		provide the pilot with simulated stick forces.
Explanation.	NIL.
Question Number.		60.	In the event of hydraulic failure in a power control system, a

requirement of the manual reversion is that it must be.

Option A. operated by the standby hydraulic system.

Option B. automatic and instantaneous.

Option C. possible, but not recommended.

Correct Answer is. automatic and instantaneous.

Explanation. NIL.

Question Number.		61.	The purpose of control cable regulators is to.
Option A.	maintain preset cable tensions during flight.
Option B.	compensate for high temperature only.
Option C.	compensate for low temperature only.
Correct Answer is.		maintain preset cable tensions during flight.
Explanation.	NIL.
Question Number.		62.	Range of movements of power operated flying control surfaces are
limited by.
Option A.	travel of the jack body.
Option B.	mechanical stops in the control system.
Option C.	travel of the jack ram.
Correct Answer is.		mechanical stops in the control system.
Explanation.	NIL.
Question Number.		63.	The aircraft is controlled about the lateral axis by the.
Option A.	ailerons.
Option B.	rudder.
Option C.	elevator.
Correct Answer is.		elevator.
Explanation.	NIL.
Question Number.		64.	The aircraft is controlled about the normal axis by the.
Option A.	elevato.
Option B.	rudder.
Option C.	ailerons.
Correct Answer is.		rudder.
Explanation.	NIL.
Question Number.		65.	The purpose of the Servo Valve in a power operated control is.

Option A. to provide pressure to operate the control.

Option B. to direct hydraulic fluid to the jack in response to the pilots control in cockpit.

Option C. to revert the system to manual operation.

Correct Answer is. to direct hydraulic fluid to the jack in response to the pilots control in cockpit.

Explanation. Jeppesen A & P Technician Textbook page 1238.

Question Number.		66.	A stick shaker is a device which.
Option A.	helps extricate an aircraft from soft ground.
Option B.	gives a short period of extra lift to assist take off.
Option C.	vibrates the control column near stalling speed.
Correct Answer is.		vibrates the control column near stalling speed.
Explanation.	NIL.
Question Number.		67.	The aircraft is controlled about the longitudinal axis by the.
Option A.	ailerons.
Option B.	elevator.
Option C.	rudder.
Correct Answer is.		ailerons.
Explanation.	NIL.
Question Number.		68.	Ruddervators when moved, will move.
Option A.	either opposite each other or together, depending on the selection.
Option B.	together only.
Option C.	opposite to each other only.
Correct Answer is.		either opposite each other or together, depending on the selection.
Explanation.	Jeppesen A&P Technician Airframe Textbook Page 16.
Question Number.		69.	As a consequence of the C of G being close to its aft limit.
Option A.	the stick forces when pitching the nose down will be very high.
Option B.	the stick forces to manoeuvre longitudinally will be low due to the low stability.
Option C.	the stick forces will be high in fore and aft pitch, due to the high longitudinal
stability.
Correct Answer is.		the stick forces when pitching the nose down will be very high.
Explanation.	NIL.
Question Number.		70.	An antibalance tab is moved.
Option A.	hydraulically.
Option B.	when the C.G. changes.
Option C.	via a fixed linkage.
Correct Answer is.		via a fixed linkage.
Explanation.	NIL.
Question Number.		71.	A servo tab is operated.
Option A.	directly by the pilot to produce forces which in turn move the main control
surfaces.
Option B.	by a trim wheel and moves in the opposite direction to the main control surfaces
when moved.
Option C.	automatically, and moves in the same direction as the main control surfaces.
Correct Answer is.		directly by the pilot to produce forces which in turn move the main control

surfaces.
Explanation.	Jeppesen A&P Technician Airframe Textbook Page 23.
Question Number.		72.	When checking full range of control surface movement, they must
be positioned by.
Option A.	operating the flightdeck/cockpit controls until the system is against the primary
stops.
Option B.	moving them by hand directly until against the primary stops.
Option C.	moving them by hand directly until against the secondary stops.
Correct Answer is.		operating the flightdeck/cockpit controls until the system is against the
primary stops.
Explanation.	NIL.
Question Number.		73.	The higher speed of the high wing in a banked turn causes it to
have more drag than the low wing, this may be compensated for by.
Option A.	operating the ailerons into the opposite sense once the correct angle of bank has
been reached.
Option B.	use of the rudder control.
Option C.	increasing the ‘nose up’ pitch by use of the elevators.
Correct Answer is.		use of the rudder control.
Explanation.	NIL.
Question Number.		74.	The type of flap which extends rearwards when lowered is called a.
Option A.	split flap.
Option B.	plain flap.
Option C.	Fowler flap.
Correct Answer is.		Fowler flap.
Explanation.	NIL.
Question Number.		75.	Which of the following trailing edge flaps give an increase in wing
area?.
Option A.	Split flap.
Option B.	Slotted flap.
Option C.	Fowler flap.
Correct Answer is.		Fowler flap.
Explanation.	NIL.
Question Number.		76.	Which of the following is not a primary flying control?.
Option A.	Tailplane.

Option B.	Elevator.
Option C.	Rudder.
Correct Answer is.		Tailplane.
Explanation.	NIL.
Question Number.		77.	A tab which assists the pilot to move a flying control by moving
automatically in the opposite direction to the control surface is called a.
Option A.	trim tab.
Option B.	servo tab.
Option C.	geared balance tab.
Correct Answer is.		geared balance tab.
Explanation.	NIL.
Question Number.		78.	What is fitted on the aircraft to enable the pilot to reduce his speed

rapidly in event of severe turbulence, or speed tending to rise above the Never Exceed Limit?.

Option A.	Wheel brakes.
Option B.	Air brakes.
Option C.	Lift dumpers.
Correct Answer is.		Air brakes.
Explanation.	NIL.
Question Number.		79.	When spoilers are used asymmetrically, they combine with.
Option A.	ailerons.
Option B.	elevators.
Option C.	rudder.
Correct Answer is.		ailerons.
Explanation.	NIL.
Question Number.		80.	What is used to correct any tendency of the aircraft to move
towards an undesirable flight attitude?.
Option A.	Trim tabs.
Option B.	Spring tabs.
Option C.	Balance tabs.
Correct Answer is.		Trim tabs.
Explanation.	NIL.
Question Number.		81.	With hydraulic ram operated flying controls, when the pressure is
reduced to zero, the flying control surfaces.
Option A.	stay at neutral.
Option B.	droop.
Option C.	remain in the position they were when power was removed.

Correct Answer is.		droop.
Explanation.	NIL.
Question Number.		82.	Powered flying control actuators.
Option A.	are operated by the autopilot only.
Option B.	transmit pilot input to the control surfaces.
Option C.	provide feedback to the pilot.
Correct Answer is.		transmit pilot input to the control surfaces.
Explanation.	NIL.
Question Number.		83.	A stick shaker operates.
Option A.	just before the stall.
Option B.	after the stall.
Option C.	at the onset of the stall.
Correct Answer is.		just before the stall.
Explanation.	Flight Instruments and Automatic Flight Control Systems Page 168.
Question Number.		84.	In a power assisted flight control system, the feel required is
normally supplied by.
Option A.	Q feel.
Option B.	air loads on the control surfaces.
Option C.	stretching springs.
Correct Answer is.		air loads on the control surfaces.
Explanation.	AL/37 8.1 and 8.2.1 Power ‘assisted’ controls have aerodynamic feedback. Power
‘operated’controls use a Q feel system.
Question Number.		85.	“Irreversibility of a fully powered control surface is
provided by.”
Option A.	nulling of the servo valve.
Option B.	air loads on the control surface.
Option C.	the jack ram being attached to structure.
Correct Answer is.		nulling of the servo valve.
Explanation.	Nulling the servo valve produces a hydraulic lock.
Question Number.		86.	Q feel units use.
Option A.	pitot pressure only.
Option B.	pitot and static pressures.
Option C.	static pressure only.
Correct Answer is.		pitot and static pressures.
Explanation.	Avionics Fundamentals pg 257 fig 1731.
Question Number.		87.	Spoiler panels are positioned so that when deployed.
Option A.	pitch trim is not affected.
Option B.	no yaw takes place.
Option C.	roll will not occur.

Correct Answer is.

Explanation. NIL.

pitch trim is not affected.

Question Number.

88.

Powered flight control systems are used on transport aircraft.

Option A. because at low level air density is high.

Option B. because the pilot has too many tasks to perform.

Option C. due to the increase in speed and size of aircraft.

Correct Answer is. due to the increase in speed and size of aircraft.

Explanation. NIL.

Question Number.		89.	A differential aileron control system results in.
Option A.	aileron drag being reduced on the inner wing in a turn.
Option B.	aileron drag being compensated by small rudder movements.
Option C.	aileron drag being reduced on the outer wing in a turn.
Correct Answer is.		aileron drag being reduced on the outer wing in a turn.
Explanation.	NIL.
Question Number.		90.	Spoiler panels are controlled by.
Option A.	the aileron control wheel and speed brake lever.
Option B.	a speed brake lever only.
Option C.	the aileron control wheel only.
Correct Answer is.		the aileron control wheel and speed brake lever.
Explanation.	NIL.
Question Number.		91.	A lift transducer is normally fitted.
Option A.	on the elevator control system.
Option B.	to the nose area of the aircraft.
Option C.	on the leading edge of the wing.
Correct Answer is.		on the leading edge of the wing.
Explanation.	Lift transducer, also known as a stall sensor.
Question Number.		92.	“If electrical power is removed from a fly by wire spoiler
system, the spoiler panels.”
Option A.	go to down if any are not already down.
Option B.	go to full up.
Option C.	remain where they are.
Correct Answer is.		go to down if any are not already down.
Explanation.	NIL.
Question Number.		93.	In a flybywire control system, the followup transducer is fitted
to.
Option A.	the control system computer.
Option B.	the hydraulic actuator.

Option C.	the pilots input.
Correct Answer is.		the hydraulic actuator.
Explanation.	NIL.
Question Number.		94.	The down position of the speed brake lever is detented to.
Option A.	prevent inadvertent operation.
Option B.	lock the speed brakes down during flight.
Option C.	allow the ground speed brakes to be used on touchdown.
Correct Answer is.		prevent inadvertent operation.
Explanation.	NIL.
Question Number.		95.	Asymmetric flap operation is prevented to keep to a minimum the
tendancy of.
Option A.	yawing.
Option B.	rolling.
Option C.	pitch changes.
Correct Answer is.		rolling.
Explanation.	NIL.
Question Number.		96.	High thrust stall warning is activated when the thrust of opposite
engine reads.
Option A.	greater than 75%.
Option B.	greater than 50%.
Option C.	greater than 90%.
Correct Answer is.		greater than 75%.
Explanation.	NIL.
Question Number.		97.	A differential aileron control is one which gives.
Option A.	a larger aileron up travel than down.
Option B.	the downgoing aileron more travel than the upgoing one.
Option C.	equal aileron travel in each direction, but variable for stick movement.
Correct Answer is.		a larger aileron up travel than down.
Explanation.	NIL.
Question Number.		98.	When the control column is moved back and the handwheel
turned to the left.
Option A.	the elevators move down and the left aileron moves down.
Option B.	the left aileron moves up and the elevators move up.
Option C.	the elevators move up and the left aileron moves down.
Correct Answer is.		the left aileron moves up and the elevators move up.
Explanation.	NIL.
Question Number.		99.	A series type yaw damper.
Option A.	moves the rudder and the ailerons to damp out Dutch roll.
Option B.	moves the rudder pedals and the rudder.

Option C. moves the rudder only.

Correct Answer is. moves the rudder only.

Explanation. NIL.

Question Number.		100. A stick shaker.
Option A.	is a linear actuator attached to the base of the control column.
Option B.	is an eccentric flywheel driven by an electric motor and mounted on the control
column.
Option C.	vibrates the elevators to cause buffeting of the airframe.
Correct Answer is.		is an eccentric flywheel driven by an electric motor and mounted on the
control column.
Explanation.	AL/321 page 22 para 13.3.2 and Transport Category Aircraft Systems Page 211.
Question Number.		101. If the control column is moved forward and to the left.
Option A.	left aileron moves down, right aileron up, elevator down.
Option B.	left aileron moves up, right aileron down, elevator down.
Option C.	left aileron moves up, right aileron moves down, elevator up.
Correct Answer is.		left aileron moves up, right aileron down, elevator down.
Explanation.	NIL.
Question Number.		102. On an aircraft fitted with spoilers for lateral control, roll to the
right is caused by.

Option A. left spoiler extending, right spoiler remaining retracted.

Option B. right spoiler extending, left spoiler remaining retracted.

Option C. both spoilers extending.

Correct Answer is. right spoiler extending, left spoiler remaining retracted.

Explanation. NIL.

Question Number.		103. When an aileron trim control in the cockpit is moved to counteract
a tendency to fly left wing low, an aileron trim tab fitted to the port aileron will.
Option A.	move up and cause the left aileron to move down but the right aileron will remain
neutral.
Option B.	move up and cause the left aileron to move down and the right aileron to move
down to a lesser degree.
Option C.	move up and this will cause the left aileron to move down and the right aileron to
move up.
Correct Answer is.		move up and cause the left aileron to move down and the right aileron to
move down to a lesser degree.
Explanation.	NIL.
Question Number.		104. You have adjusted the elevator trim tab to correct for nose heavy.
What was the direction of travel of the trim tab?.
Option A.	The port elevator tab has moved up and starboard moved down.
Option B.	The elevator trim tab has moved up.

Option C. The elevator trim tab has moved down.

Correct Answer is. The elevator trim tab has moved down.

Explanation. NIL.

Question Number.		105.	Pulleys in a flight control system are made from.
Option A.	brass.
Option B.	stainless steel.
Option C.	Tufnol or aluminium alloy.
Correct Answer is.		Tufnol or aluminium alloy.
Explanation.	NIL.
Question Number.		106.	A tension regulator in the flight control cable system of a large all

metal aircraft is used primarily to.

Option A. retain a set tension.

Option B. increase cable tension in cold weather.

Option C. decrease cable tension in cold weather.

Correct Answer is. retain a set tension.

Explanation. NIL.

Question Number. 107. An interrupter arm incorporated in a flying control locking

mechanism.

Option A. locks the ailerons and elevators.

Option B. restricts movement of the throttles.

Option C. dampens the rudder movement.

Correct Answer is. restricts movement of the throttles.

Explanation. NIL.

Question Number.		108. The yaw damper must be designed to allow the rudder to control in
response to the aircraft’s.
Option A.	pitch Frequency.
Option B.	roll frequency.
Option C.	dutch roll frequency.
Correct Answer is.		dutch roll frequency.
Explanation.	NIL.
Question Number.		109. The alpha vane signal can be fed to __________ when the aircraft
is close to stall.
Option A.	flap position.
Option B.	fast/slow switch.
Option C.	throttle lever.
Correct Answer is.		throttle lever.
Explanation.	NIL.

Question Number.		110. Moving the elevator trim wheel fully aft, then the.
Option A.	aircraft tends to go nose down.
Option B.	aircraft tends to go nose up.
Option C.	aircraft tends to roll to the right.
Correct Answer is.		aircraft tends to go nose up.
Explanation.	NIL.
Question Number.		111. Ground spoilers are used to.
Option A.	increase wing loading on takeoff.
Option B.	prevent FOD ingestion into the engines on landing and taxiing.
Option C.	decrease wing loading on landing.
Correct Answer is.		decrease wing loading on landing.
Explanation.	NIL.
Question Number.		112. The outboard ailerons on some aircraft.
Option A.	are isolated at slow speeds.
Option B.	are isolated to prevent aileron reversal.
Option C.	are isolated to improve sensitivity.
Correct Answer is.		are isolated to prevent aileron reversal.
Explanation.	NIL.
Question Number.		113. The effect of the rudder on an aircraft can be increased by.
Option A.	increasing the distance of the control surfaces from the aircraft’s centre of gravity.
Option B.	increasing the altitude of the aircraft.
Option C.	decreasing the velocity of the aircraft.
Correct Answer is.		increasing the distance of the control surfaces from the aircraft’s centre of
gravity.
Explanation.	NIL.
11B.10. Fuel Systems (ATA 28).

Question Number.		1.	A fuel crossfeed valve is usually in.
Option A.	the closed position.
Option B.	the open position.
Option C.	its last position.
Correct Answer is.		the closed position.
Explanation.	Fuel crossfeed valves must be closed for flight.
Question Number.		2.	Sliding couplings in fuel systems are used on.
Option A.	low pressure systems.
Option B.	high pressure systems.
Option C.	air or vapour systems.
Correct Answer is.		air or vapour systems.
Explanation.	CAIPs AL/317 5.8.3.

Question Number.		3.	A fuel crossfeed valve is lubricated.
Option A.	by internal cooling.
Option B.	by air.
Option C.	by the fuel.
Correct Answer is.		by the fuel.
Explanation.	NIL.
Question Number.		4.	Fuel cross feed valves are operated by the.
Option A.	28 V DC bus.
Option B.	115 V AC.
Option C.	battery.
Correct Answer is.		28 V DC bus.
Explanation.	737 MM 282200 Page 1, A320 FCOM 28.30 pg1.
Question Number.		5.	Fuel systems that are interconnected must have.
Option A.	separate venting for each tank.
Option B.	no airspace.
Option C.	air spaces interconnected.
Correct Answer is.		air spaces interconnected.
Explanation.	CAIPs AL/317.
Question Number.		6.	As fuel level increases, system capacitance.
Option A.	decreases.
Option B.	no change.
Option C.	increases.
Correct Answer is.		increases.
Explanation.	The dielectric constant of kerosene is more than that of air. B757 MM Chapter
284100.
Question Number.		7.	When refuelling.
Option A.	the fuel nozzle will automatically cut off the supply when the tank is full.
Option B.	it is important not to fill the expansion space in the tank.
Option C.	it is important to fill the expansion space in the tank.
Correct Answer is.		it is important not to fill the expansion space in the tank.
Explanation.	Jeppesen A&P Technician Airframe Textbook Page 1518.
Question Number.		8.	When using Biopor microbial fuel growth treatment.
Option A.	it is added to the fuel and burnt.
Option B.	it is applied dry and left.
Option C.	it is applied wet and flushed out.
Correct Answer is.		it is added to the fuel and burnt.
Explanation.	Jeppesen Aircraft Gas Turbine Powerplants 73.

Question Number.		9.	Microbial growth is.
Option A.	red dots.
Option B.	brown black slime.
Option C.	green sludge.
Correct Answer is.		brown black slime.
Explanation.	Jeppesen A&P Technician Airframe Textbook Page 1538.
Question Number.		10.	Bladder type fuel tanks are secured by.
Option A.	bolts.
Option B.	contact adhesive.
Option C.	press type rivets.
Correct Answer is.		press type rivets.
Explanation.	AL/315 4.1.3 says press studs or cords.
Question Number.		11.	A zero fuel test on a fuel quantity indicating system is carried out
with.
Option A.	tanks completely full.
Option B.	tanks completely empty.
Option C.	tanks empty apart from unusable fuel.
Correct Answer is.		tanks empty apart from unusable fuel.
Explanation.	AL/103 11.14.1.e.
Question Number.		12.	After a tank bag has been replaced, a fuel flow test should be
carried out at.
Option A.	tank outlet.
Option B.	engine inlet.
Option C.	tank shutoff valve point.
Correct Answer is.		engine inlet.
Explanation.	NIL.
Question Number.		13.	In biologically contaminated fuel, corrosion takes place.
Option A.	below the fungal colonies.
Option B.	the top of the tank.
Option C.	the bottom 2 inches of the tank.
Correct Answer is.		below the fungal colonies.
Explanation.	AL/315 para 8.3.
Question Number.		14.	If an aircraft has ability to transfer fuel in flight, provision must be
made to.
Option A.	shut off fuel before structural damage.
Option B.	provide overflow facility to dump fuel.
Option C.	stop engine from using tank during transfer.
Correct Answer is.		shut off fuel before structural damage.

Explanation.	JAR 25.957.
Question Number.		15.	In a fuel system with interconnected vents.
Option A.	an expansion space is not required.
Option B.	the expansion space must be 2% of the tank capacity.
Option C.	the expansion space must be 10% of the tank capacity.
Correct Answer is.		the expansion space must be 2% of the tank capacity.
Explanation.	JAR 25.969.
Question Number.		16.	Fuel tanks interconnected must have.
Option A.	vents to allow overfueling.
Option B.	protection against overfill for tanks and fuel system.
Option C.	tank where fuel is fed from both tanks to engine inlet.
Correct Answer is.		protection against overfill for tanks and fuel system.
Explanation.	JAR 25.969.
Question Number.		17.	When a FADEC system loses air data input it goes to.
Option A.	soft reversion.
Option B.	hard reversion.
Option C.	mechanical reversion.
Correct Answer is.		soft reversion.
Explanation.	TTS FADEC Booklet Page 13.
Question Number.		18.	Pressure refuelling is carried out at.
Option A.	20 PSI.
Option B.	40 PSI.
Option C.	15 PSI.
Correct Answer is.		40 PSI.
Explanation.	AL/317 5.4 says ‘up to 50 psi’.
Question Number.		19.	Cross feed valves permit fuel transfer from.
Option A.	tank to tank.
Option B.	left tank to right tank.
Option C.	any tank to any engine.
Correct Answer is.		any tank to any engine.
Explanation.	B737 MM 282200 Page 1.
Question Number.		20.	What is fitted to the fuel jettison pipe to prevent vaporisation?.
Option A.	An anticorona device.
Option B.	A corona device.
Option C.	A nozzle.

Correct Answer is.		An anticorona device.
Explanation.	NIL.
Question Number.		21.	What happens to the capacitance in a fuel contents gauge as fuel is
used?.
Option A.	Depends on altitude.
Option B.	Increases.
Option C.	Decreases.
Correct Answer is.		Decreases.
Explanation.	Aircraft Electricity and Electronics Eismin Page 353.
Question Number.		22.	When an aircraft is put into storage for medium / long periods, the
fuel tanks should.
Option A.	have some fuel left in to prevent sealant from deteriorating/drying out.
Option B.	be full.
Option C.	be empty.
Correct Answer is.		have some fuel left in to prevent sealant from deteriorating/drying out.
Explanation.	AL/315 9.3.
Question Number.		23.	Integral fuel booster pumps.
Option A.	require ram air cooling.
Option B.	lets the fuel do cooling.
Option C.	require no cooling.
Correct Answer is.		lets the fuel do cooling.
Explanation.	NIL
Question Number.		24.	The purpose of a scavenge system within a fuel system is.
Option A.	to ensure that all unused fuel is returned to the tanks efficiently.
Option B.	to ensure that all available fuel can be used.
Option C.	to ensure that any water in the fuel is constantly dispersed thus reducing
microbiological contamination.
Correct Answer is.		to ensure that any water in the fuel is constantly dispersed thus reducing
microbiological contamination.
Explanation.	Transport Category Aircraft Systems Page 6.17.
Question Number.		25.	In a light fixed wing aircraft, the fuel warning light indicates.
Option A.	pump failure.
Option B.	the tank does not pressurise.
Option C.	ice blockage, filter popped or pump fail.
Correct Answer is.		ice blockage, filter popped or pump fail.
Explanation.	NIL.
Question Number.		26.	How is fuel supplied to a turbine engine?.
Option A.	By a fuel boost pump.

Option B. By suction from the engine driven fuel pump.

Option C. By a gravity feed pump.

Correct Answer is. By a fuel boost pump.

Explanation. NIL.

Question Number.		27.	A fuel tank suction valve will open when.
Option A.	the booster pump fails.
Option B.	both the engine driven and booster pump fail.
Option C.	the engine driven pump fails.
Correct Answer is.		the booster pump fails.
Explanation.	NIL.
Question Number.		28.	To prevent water condensation in a fuel tank.
Option A.	the tank should be filled as full as possible.
Option B.	the tank should be filled with the minimum fuel possible.
Option C.	the filler cap should be left open.
Correct Answer is.		the tank should be filled as full as possible.
Explanation.	NIL.
Question Number.		29.	To protect the centre tank fuselage area from a vapour build up.
Option A.	ram air is circulated around the tank.
Option B.	a shroud vent and overboard drain is fitted.
Option C.	cabin air is bled around the tank.
Correct Answer is.		cabin air is bled around the tank.
Explanation.	NIL.
Question Number.		30.	When a fuel jettison valve is in transit, the magnetic indicator
would show.
Option A.	amber and in line.
Option B.	amber and cross line.
Option C.	green and in line.
Correct Answer is.		amber and cross line.
Explanation.	NIL.
Question Number.		31.	When considering the basic categories of fuel tank construction,
which of the following is most prone to leaks?.
Option A.	Rigid.
Option B.	Integral.
Option C.	Flexible.
Correct Answer is.		Integral.
Explanation.	NIL.
Question Number.		32.	On removal of a fuel tank booster pump, fuel is observed running
out of the boost pump canister, this could be caused by.
Option A.	the pressure outlet check valve is not correctly seated.

Option B. fuel draining out of the pressure switch bleed.

Option C. fuel leaking past the inlet screens.

Correct Answer is. the pressure outlet check valve is not correctly seated.

Explanation. NIL.

Question Number.		33.	Crossfeed valves are normally fitted with.
Option A.	two 28V DC motors.
Option B.	two threephase AC motors.
Option C.	two single phase AC motors.
Correct Answer is.		two 28V DC motors.
Explanation.	NIL.
Question Number.		34.	A shroud vent and overload drain would normally be found on.

Option A. fuel tank vent pipes.

Option B. fuel jettison system.

Option C. the APU fuel feed.

Correct Answer is. fuel tank vent pipes.

Explanation. NIL.

Question Number.		35.	To shutoff the LP fuel supply to the engine for the purpose of
engine removal you would.
Option A.	close the cross bleed valve.
Option B.	close the HP fuel lock.
Option C.	pull the fire handle.
Correct Answer is.		pull the fire handle.
Explanation.	After first pulling teh firebottle CBs.
Question Number.		36.	A leak from a fuel tank which manifests as fuel dripping from the
tank is classified as a.
Option A.	stain.
Option B.	seep.
Option C.	run.
Correct Answer is.		run.
Explanation.	AL/315 page 8 para 5.4.1.
Question Number.		37.	Calcium Chromate tablets can be fitted in integral tanks. Before
installation the linen bag should be wetted with.
Option A.	Water.
Option B.	Methylated Spirit.
Option C.	Kerosene.
Correct Answer is.		Water.
Explanation.	NIL.

Question Number.		38.	A check valve is fitted to a fuel jettison system to.
Option A.	prevent the centre from being defuelled.
Option B.	prevent the dumping of the outer tanks.
Option C.	automatically stop the fuel jettison operation after a period of time.
Correct Answer is.		prevent the dumping of the outer tanks.
Explanation.	NIL.
Question Number.		39.	The advantages of integral fuel tanks are that they.
Option A.	are cheaper to manufacture, more durable and easier to maintain.
Option B.	use the maximum volume for fuel and have the minimum amount of weight.
Option C.	are easier to design and construct and use the maximum volume of fuel.
Correct Answer is.		use the maximum volume for fuel and have the minimum amount of
weight.
Explanation.	NIL.
Question Number.		40.	On Large transport aircraft fuel is delivered to each engine using.

Option A. a parallel system.

Option B. the same system for each engine.

Option C. a separate system for each engine.

Correct Answer is. the same system for each engine.

Explanation. “This question can be interpreted an many ways, and all three answers arguably correct.

However, based upon the fact that the fuel system can feed any engine from any tank, we have interpreted it as ‘every engine is fed from the same system’.”

11B.11. Hydraulic Power (ATA 29) (63)

Question Number.		1.	A purpose of a ‘cutout’ in a hydraulic system.
Option A.	is to prevent creep in jack operated services which have several selected positions.
Option B.	is to limit loss of fluid in the event of pipe fracture.
Option C.	is to relieve the pump of load when the operation of services is complete and the
accumulator charged with			fluid.
Correct Answer is.		is to relieve the pump of load when the operation of services is complete
and the accumulator charged with fluid.
Explanation.	CAIPs AL/321 5.2.
Question Number.		2.	Hydraulic pressure can be restored by.
Option A.	compressing the air charge in an accumulator.
Option B.	the use of a pressure/heat exchanger.

Option C. compressing the fluid in a reservoir.

Correct Answer is. compressing the air charge in an accumulator.

Explanation. CAIPs AL/321 Para 7.

Question Number.		3.	What is the colour of the band on a hydraulic seal?.
Option A.	Yellow.
Option B.	Green.
Option C.	White.
Correct Answer is.		Green.
Explanation.	Jeppesen A&P Technician Airframe Textbook Page 844.
Question Number.		4.	A maintainer valve in an hydraulic system will.
Option A.	allow continued press to essential systems during times of reduced supply.
Option B.	dampen pressure inputs.
Option C.	maintain a high pressure to all systems.
Correct Answer is.		allow continued press to essential systems during times of reduced supply.
Explanation.	Jeppesen A&P Technician Airframe Textbook Page 831 Also known as priority
valves CAIPs AL/321 5.3.
Question Number.		5.	Where is the temperature overheat switch located in a hydraulic
pump?.
Option A.	In the pressure line.
Option B.	In the suction line.
Option C.	In the case drain.
Correct Answer is.		In the case drain.
Explanation.	Jeppesen Transport Category Aircraft Systems 710 and 78.
Question Number.		6.	What happens if a component has an internal hydraulic leak?.
Option A.	Fluid loss.
Option B.	Increase in fluid pressure.
Option C.	Increase in fluid temperature.
Correct Answer is.		Increase in fluid temperature.
Explanation.	Increase in temperature is an indication of internal leaks.
Question Number.		7.	What happens to hydraulic fluid when it is overheated?.
Option A.	Increase acidity.
Option B.	Increase viscosity.
Option C.	Increase alkalinity.
Correct Answer is.		Increase acidity.
Explanation.	Hi acidity is a common problem revealed after an oil system analysis.

Question Number.		8.	How is the hydraulic pump depressurising solenoid actuated?.
Option A.	Energised both open and closed depending on cockpit selection.
Option B.	Energised Open.
Option C.	Energised Closed for failsafe.
Correct Answer is.		Energised Closed for failsafe.
Explanation.	The depressurising valve (sometimes called an ‘offloading valve’) is energised
closed, to failsafe open.
Question Number.		9.	How do you prevent hydraulic fluid frothing?.
Option A.	By pressurising.
Option B.	Vent Reservoir to atmosphere.
Option C.	Pass over a tray.
Correct Answer is.		By pressurising.
Explanation.	Jeppesen A&P Technician Airframe Textbook 816.
Question Number.		10.	Accumulators as fitted to aircraft hydraulic systems.
Option A.	are only ever used in an emergency.
Option B.	store fluid under pressure.
Option C.	provide additional fluid if leaks occur.
Correct Answer is.		store fluid under pressure.
Explanation.	CAIPs AL/321 Para 7.
Question Number.		11.	A Skydrol hydraulic fluid seal would be made of.
Option A.	natural rubber.
Option B.	synthetic rubber.
Option C.	butyl rubber, ethylene propylene or Teflon.
Correct Answer is.		butyl rubber, ethylene propylene or Teflon.
Explanation.	CAIPs AL/321 Para 3.3.1.
Question Number.		12.	Synthetic hydraulic fluid subjected to overheating is high in.
Option A.	acidity.
Option B.	alkalinity.
Option C.	viscosity.
Correct Answer is.		acidity.
Explanation.	Overheating causes acidity.
Question Number.		13.	A normal hydraulic system will.
Option A.	show pressure and source of hydraulics.
Option B.	show fluid temperature and quantity.
Option C.	illuminate a light in the cockpit when the system is ready.
Correct Answer is.		show pressure and source of hydraulics.
Explanation.	Some systems show temperature, but they are not ‘normal’.

Question Number.		14.	A constant volume hydraulic system uses what to relieve pressure
in system when no services are being used?.
Option A.	Pressure relief valve.
Option B.	Return line back to pump.
Option C.	ACOV.
Correct Answer is.		ACOV.
Explanation.	CAIPs AL/321 12.2.
Question Number.		15.	The control of hydraulically powered emergency electrical
generator frequency is by.
Option A.	restriction valve.
Option B.	angle of swashplate.
Option C.	IDG.
Correct Answer is.		angle of swashplate.
Explanation.	NIL.
Question Number.		16.	Hydraulic systems normally operate at.
Option A.	1800 PSI.
Option B.	3000 PSI.
Option C.	300 PSI.
Correct Answer is.		3000 PSI.
Explanation.	Transport Category Aircraft Systems Jeppesen Pages 75 & 77.
Question Number.		17.	When flushing hydraulic systems.
Option A.	flush with methylated spirit.
Option B.	flush with any hydraulic oil.
Option C.	flush with same hydraulic oil.
Correct Answer is.		flush with same hydraulic oil.
Explanation.	NIL.
Question Number.		18.	When replenishing a hydraulic system.
Option A.	use any hydraulic fluid.
Option B.	use any hydraulic fluid made by the same manufacturer.
Option C.	use the same/correct hydraulic fluid.
Correct Answer is.		use the same/correct hydraulic fluid.
Explanation.	Transport Category Aircraft Systems Jeppesen Page 72.
Question Number.		19.	When replacing a flexible pipe.
Option A.	do a bonding check.
Option B.	tighten only hand tight.
Option C.	use two spanners to stop pipe from twisting.
Correct Answer is.		use two spanners to stop pipe from twisting.
Explanation.	AL/313 6.5.

Question Number.		20.	How do you remove air from hydraulic fluid?.
Option A.	Vent to atmosphere.
Option B.	Pass through a restriction.
Option C.	Pass over a tray.
Correct Answer is.		Pass over a tray.
Explanation.	NIL.
Question Number.		21.	A pressure control relay in a hydraulic pump is.
Option A.	energised to the run position.
Option B.	used to prevent anything happening until there is hydraulic pressure.
Option C.	deenergised to start the pump.
Correct Answer is.		deenergised to start the pump.
Explanation.	NIL.
Question Number.		22.	A constant delivery pump has its output varied with.
Option A.	regulators.
Option B.	gears.
Option C.	servo pressure.
Correct Answer is.		regulators.
Explanation.	Constant delivery is constant flow rate.
Question Number.		23.	A variable angled pump starts at.
Option A.	half way position.
Option B.	minimum stroke.
Option C.	maximum stroke.
Correct Answer is.		maximum stroke.
Explanation.	CAIPs AL/323.
Question Number.		24.	A check flow valve in a hydraulic system prevents.
Option A.	pump cavitation.
Option B.	reverse flow.
Option C.	overpressure.
Correct Answer is.		reverse flow.
Explanation.	NIL.
Question Number.		25.	A duplex seal consist of.
Option A.	a square section rubber ring within a steel washer.
Option B.	a hard rubber square section ring with a soft rubber square section inner ring.
Option C.	a rubber ‘T’ section ring sandwiched between two Teflon rings.
Correct Answer is.		a rubber ‘T’ section ring sandwiched between two Teflon rings.

Explanation.	NIL.
Question Number.		26.	When is an hydraulic depressurising valve energised?.
Option A.	When selected on.
Option B.	When there is sufficient hydraulic pressure available.
Option C.	When selected off.
Correct Answer is.		When selected off.
Explanation.	AL/321 4.2.
Question Number.		27.	A fixed volume axial pump contains the following rotating parts.
Option A.	Drive Shaft, Swash Plate & Valve Block.
Option B.	Swash Plate & Valve Block.
Option C.	Drive Shaft, Swash Plate & Cylinder Block.
Correct Answer is.		Drive Shaft, Swash Plate & Cylinder Block.
Explanation.	AL/321 Figure 2.
Question Number.		28.	An hydraulic closed system is one where.
Option A.	pressure is maintained at the selector valves at all times.
Option B.	there is no pressure at the selector valves when no functions are required.
Option C.	most of the major components of the system are included in a self contained unit.
Correct Answer is.		pressure is maintained at the selector valves at all times.
Explanation.	AL/321 12.112.3.
Question Number.		29.	What constitutes a hydraulic power pack?.
Option A.	Variable swashplate pump.
Option B.	Reservoir, pump, selector valve, filter.
Option C.	Hydraulic oil accumulator.
Correct Answer is.		Reservoir, pump, selector valve, filter.
Explanation.	Jeppeson A & P Technician Airframe P815
Question Number.		30.	If an accumulator loses air pressure there will be.
Option A.	rapid depressurisation of system.
Option B.	pump cavitation.
Option C.	rapid fluctuations of instruments.
Correct Answer is.		rapid fluctuations of instruments.
Explanation.	NIL.
Question Number.		31.	A marker number on a pipe indicates.
Option A.	the thickness of the wall on the pipe.
Option B.	the specification of the pipe throughout the pipe run.
Option C.	the type of fluid used to pressure test the pipe.

Correct Answer is.

Explanation. NIL.

the specification of the pipe throughout the pipe run.

Question Number.

32.

“One reason for fitting an accumulator in an hydraulic system is

to.”

Option A. minimize the possibility of pump cavitation.

Option B. absorb pressure surges.

Option C. relieve excess pressure.

Correct Answer is. absorb pressure surges.

Explanation. NIL.

Question Number.		33.	A thermal relief valve is fitted to an hydraulic system to.
Option A.	prevent a leak back of pressure.
Option B.	prevent excess temperature.
Option C.	relieve excess pressure.
Correct Answer is.		relieve excess pressure.
Explanation.	Thermal relief valves relieve the pressure buildup due to excessive temperature.
Question Number.		34.	A component in a hydraulic system which ensures instantaneous
action when a service is selected is.
Option A.	accumulator.
Option B.	engine driven pump.
Option C.	selector.
Correct Answer is.		accumulator.
Explanation.	NIL.
Question Number.		35.	A shuttle valve is used for.
Option A.	preventing fluid loss from a leaking jack.
Option B.	maintaining fluid press when the emergency system fails.
Option C.	change over from main to auxiliary system in the case of failure.
Correct Answer is.		change over from main to auxiliary system in the case of failure.
Explanation.	AL/321 6.4
Question Number.		36.	Restrictor valves in an hydraulic system are used to.
Option A.	restrict the rate of pressure build up.
Option B.	control the rate of system operation.
Option C.	limit the maximum pressure.
Correct Answer is.		control the rate of system operation.
Explanation.	AL/321 6.2.
Question Number.		37.	The purpose of a mechanical sequence valve is to ensure the
operation of.
Option A.	landing gear and doors.

Option B.	safety switches.
Option C.	brake antiskid units.
Correct Answer is.		landing gear and doors.
Explanation.	NIL.
Question Number.		38.	The purpose of a nonreturn valve is to.
Option A.	direct fluid to the hydraulic actuator.
Option B.	restrict the movement of components.
Option C.	isolate one component from another.
Correct Answer is.		direct fluid to the hydraulic actuator.
Explanation.	AL/321 Page 10.
Question Number.		39.	The end fittings on a NRV are normally different to.
Option A.	facilitate bleeding of the system.
Option B.	allow a full flow from the valve.
Option C.	prevent incorrect installation.
Correct Answer is.		prevent incorrect installation.
Explanation.	AL/321 Page 10.
Question Number.		40.	A hydraulic accumulator is charged with initial air pressure of
1000 PSI. When the hydraulic system pressure of 3000 PSI is reached, the air pressure is.
Option A.	4000 PSI.
Option B.	3000 PSI.
Option C.	1000 PSI.
Correct Answer is.		3000 PSI.
Explanation.	NIL.
Question Number.		41.	Automatic cutout valve hammering is caused by.
Option A.	low accumulator pressure.
Option B.	moisture in the fluid.
Option C.	relief valve set too high.
Correct Answer is.		low accumulator pressure.
Explanation.	NIL.
Question Number.		42.	Hand pumps are normally single cylinder double acting because of
the.
Option A.	two NRVS fitted.
Option B.	relief valve.
Option C.	piston ram displacement.
Correct Answer is.		two NRVS fitted.
Explanation.	CAIPs AL/321 Page 6.
Question Number.		43.	During a leak test of an hydraulic system, system pressure.

Option A. is not important.

Option B. must be minimum working.

Option C. must be at maximum.

Correct Answer is. must be at maximum.

Explanation. NIL.

Question Number.		44.	Constant delivery hydraulic pumps.
Option A.	require an automatic cutout valve in the system.
Option B.	require an automatic cutout valve and accumulator in the system.
Option C.	are self idling.
Correct Answer is.		require an automatic cutout valve and accumulator in the system.
Explanation.	NIL.
Question Number.		45.	Mechanical sequence valves are operated by.
Option A.	a striker pin.
Option B.	the pilot.
Option C.	the operation of a NRV.
Correct Answer is.		a striker pin.
Explanation.	NIL.
Question Number.		46.	Pressure relay valves are fitted.
Option A.	before a pressure gauge.
Option B.	before a pressure sequence valve.
Option C.	before a pressure relief valve.
Correct Answer is.		before a pressure gauge.
Explanation.	AL/321 13.3.2.
Question Number.		47.	Before checking the initial pressure in the hydraulic accumulator.
Option A.	the reservoir must be checked for correct level.
Option B.	the fluid pressure must be released.
Option C.	all air must be bled from the system.
Correct Answer is.		the fluid pressure must be released.
Explanation.	NIL.
Question Number.		48.	Hydraulic reservoirs are pressurized to.
Option A.	provide a reserve of stored energy.
Option B.	maintain a constant fluid level.
Option C.	minimize the possibility of pump cavitation.
Correct Answer is.		minimize the possibility of pump cavitation.
Explanation.	CAIPs AL/321 Para 15 Page 7.
Question Number.		49.	In aircraft hydraulic systems, it is permissible to use.

Option A. only the specified fluid.

Option B. any fluid of the same specific gravity.

Option C. any hydraulic fluid available.

Correct Answer is. only the specified fluid.

Explanation. NIL.

Question Number.	50.	The essential components of a hydraulic system of the constant
delivery type are an.

Option A. accumulator and automatic cutout valve.

Option B. accumulator and shuttle valve.

Option C. accumulator and relay valve.

Correct Answer is. accumulator and automatic cutout valve.

Explanation. NIL.

Question Number.		51.	An automatic cutout valve will.
Option A.	limit pump wear.
Option B.	prevent the hydraulic lock forming.
Option C.	raise fluid boiling point.
Correct Answer is.		prevent the hydraulic lock forming.
Explanation.	NIL.
Question Number.		52.	A maintaining valve is fitted to a hydraulic system.
Option A.	to maintain a back pressure to the accumulator.
Option B.	relieve excessive pressure to return.
Option C.	to ensure a supply of fluid to essential services in the event of system failure.
Correct Answer is.		to ensure a supply of fluid to essential services in the event of system
failure.
Explanation.	NIL.
Question Number.		53.	A thermal relief valve.
Option A.	senses fluid temperature change.
Option B.	senses fluid pressure.
Option C.	provides cooling for the fluid.
Correct Answer is.		senses fluid pressure.
Explanation.	A&P Technician Airframe Textbook 814
Question Number.		54.	Hydraulic systems are normally flushed with.
Option A.	methylated spirits.
Option B.	the same type of fluid as used in the system.
Option C.	any clean hydraulic fluid.
Correct Answer is.		the same type of fluid as used in the system.
Explanation.	NIL.

Question Number.		55.	Phosphate Ester hydraulic fluid requires which kind of seals?.
Option A.	Butyl Rubber.
Option B.	Synthetic Rubber.
Option C.	Natural Rubber.
Correct Answer is.		Butyl Rubber.
Explanation.	AL/321 3.3.
Question Number.		56.	A RAT hydraulic pump is for.
Option A.	landing gear and autobrake systems.
Option B.	nose wheel steering.
Option C.	flying controls if hydraulic power lost.
Correct Answer is.		flying controls if hydraulic power lost.
Explanation.	NIL.
Question Number.		57.	Hydraulic handpump fluid supply is taken from.
Option A.	a tap into a convenient return line.
Option B.	a stack pipe higher than the normal level.
Option C.	the bottom of the reservoir.
Correct Answer is.		the bottom of the reservoir.
Explanation.	AL321 8.1.
Question Number.		58.	Hand pumps in hydraulic systems are normally.
Option A.	single acting.
Option B.	low pressure.
Option C.	double acting.
Correct Answer is.		double acting.
Explanation.	Jeppeson A & P technician Airframe P823.
Question Number.		59.	To enable an hydraulic system to operate two components
requiring different pressures.
Option A.	a pressure reducing valve is used.
Option B.	a pressure regulating valve is used.
Option C.	a pressure relief valve is used.
Correct Answer is.		a pressure reducing valve is used.
Explanation.	NIL.
Question Number.		60.	The force exerted by a hydraulic cylinder is equal to.
Option A.	area * volume.
Option B.	area * pressure.
Option C.	pressure * stroke.
Correct Answer is.		area * pressure.
Explanation.	NIL.

Question Number.		61.	A tandem PFCU.
Option A.	has two control surfaces under its control.
Option B.	has the rams parallel.
Option C.	has the actuator rams coaxial.
Correct Answer is.		has the actuator rams coaxial.
Explanation.	NIL.
Question Number.		62.	The reason why slack must be left in a flexible hose during
installation, is a flexible hose under pressure.
Option A.	expands in length and diameter.
Option B.	contracts in length and diameter.
Option C.	contracts in length and expands in diameter.
Correct Answer is.		contracts in length and expands in diameter.
Explanation.	A&P Mechanics General Handbook page 115.
Question Number.		63.	An automatic cutout valve is necessary in a hydraulic system
with.
Option A.	a fixed volume pump.
Option B.	pressures above 3000 PSI.
Option C.	a variable volume pump.
Correct Answer is.		a fixed volume pump.
Explanation.	NIL.
11B.12. Ice and Rain Protection (ATA 30) (25)
Question Number.		1.	How is a serrated rod ice detector bench tested?.
Option A.	Screwdriver torque test.
Option B.	By a motor load test.
Option C.	Motor test and go/nogo gap measurement.
Correct Answer is.		Screwdriver torque test.
Explanation.	Retard rotation [of the detector] with slight thumb pressure using a torque
screwdriver.’ Ref: CAIPs AL/116.
Question Number.		2.	Windshield heating provides.
Option A.	thermal expansion for a tighter fit.
Option B.	impact resistance enhancement.
Option C.	increases strength to resist cabin pressure.
Correct Answer is.		impact resistance enhancement.
Explanation.	Jeppesen A&P Technician Airframe Textbook Page 136 (last paragraph).
Question Number.		3.	At what pressure and temperature is anti ice fluid applied?.
Option A.	7°F at 100 PSI.
Option B.	70°C at 100 PSI.
Option C.	70°F at 10 PSI.
Correct Answer is.		70°C at 100 PSI.

Explanation.	CAIPs AL/113 5.2.2.
Question Number.		4.	The advantage of leading edge fluid deicing is.
Option A.	less of a fire hazard.
Option B.	aerodynamic shape is not disturbed.
Option C.	more efficient.
Correct Answer is.		aerodynamic shape is not disturbed.
Explanation.	The advantage of leading edge fluid deicing is aerodynamic shape is not
disturbed.
Question Number.		5.	On large transport aircraft, the windshield wiper system is.
Option A.	one system for both sides but with the same power source.
Option B.	independent on each side but with the same power source.
Option C.	independent on each side with different power sources.
Correct Answer is.		independent on each side with different power sources.
Explanation.	Aircraft Electrical Systems, Pallett, Page 178.
Question Number.		6.	Prior to securing a leading edge deicing boot you must.
Option A.	remove all paint.
Option B.	paint the surface.
Option C.	shave rivet to prevent further abrasion.
Correct Answer is.		remove all paint.
Explanation.	CAIPs AL/111 4.2.2.
Question Number.		7.	On a ‘hot rod’ type of ice detector, it is switched on.
Option A.	all the time.
Option B.	when selected by the crew.
Option C.	when in the air.
Correct Answer is.		when selected by the crew.
Explanation.	AL/116 3.2.1.
Question Number.		8.	Ice formation on wings is due to.
Option A.	suspended ice crystals melting on contact with the wing and instantly refreezing.
Option B.	ice crystals forming layers on contact with the wing.
Option C.	supercooled water changing state on contact with the wing.
Correct Answer is.		supercooled water changing state on contact with the wing.
Explanation.	AL/116 2
Question Number.		9.	When a vibrating rod ice detector has deiced, the warning lamp on
the flight deck.
Option A.	goes out immediately.
Option B.	goes out after one more cycle.
Option C.	goes out after a set period of time.

Correct Answer is.		goes out after a set period of time.
Explanation.	CAIPs AL/116 3.4.1.
Question Number.		10.	Demisting of passenger windows is provided by.
Option A.	sealed window.
Option B.	an electrical heating element.
Option C.	air from the cabin.
Correct Answer is.		air from the cabin.
Explanation.	CAIPs AL/324 fig 1.
Question Number.		11.	A deicer boot is completely bonded to the leading edge to.
Option A.	provide smoother airflow over leading edge.
Option B.	prevent electrical static build up.
Option C.	provide more efficient deicer cycles.
Correct Answer is.		prevent electrical static build up.
Explanation.	CAIPs AL/111 3.4 (unless they mean ‘bonded’ as in cemented. In which case the
answer is b).
Question Number.		12.	In a cockpit window heater system, the autotransformer.
Option A.	supplies DC power for heating.
Option B.	supplies AC Power for heating.
Option C.	steps up output for severe weather conditions.
Correct Answer is.		steps up output for severe weather conditions.
Explanation.	Aircraft Electrical Systems Pallett Page 62/63 (Note: a transformer cannot
‘supply’.
Question Number.		13.	Windshield rain repellent is applied.
Option A.	when rain is on windows and spread by wipers.
Option B.	before rain and spread on window surface by wipers.
Option C.	when in heavy rain so vision is unobscured.
Correct Answer is.		when rain is on windows and spread by wipers.
Explanation.	Jeppesen, A&P Airframe Textbook Page 1317.
http://www.b737.org.uk/iceandrain.htm
Question Number.		14.	Pneumatic rain removal systems.
Option A.	use engine bleed air at high velocity to remove water droplets from windscreen.
Option B.	are not permitted on large transport aircraft.
Option C.	use a pneumatic motor to drive windscreen wipers.
Correct Answer is.		use engine bleed air at high velocity to remove water droplets from
windscreen.
Explanation.	Jeppesen A & P Technician Airframe Textbook page 1318.
Question Number.		15.	Windscreen wiper torque tests are carried out at.
Option A.	blade attachment end.
Option B.	centre point of the blade.
Option C.	the shaft end.

Correct Answer is. the shaft end.

Explanation. NIL.

Question Number. 16. Windscreen autotransformers.

Option A. step down voltage.

Option B. step up voltage.

Option C. are used to supply extra current under difficult conditions.

Correct Answer is. step up voltage.

Explanation. AL/114 4.2.2.

Question Number.		17.	An ice deposit formed when liquid water flows over the airframe
before freezing, and which is dense, tough and sticks closely to the surface is called.
Option A.	glaze Ice.
Option B.	rime Ice.
Option C.	hoar Frost.
Correct Answer is.		glaze Ice.
Explanation.	NIL.
Question Number.		18.	When testing pitot head heaters.
Option A.	they can only be checked by noting the temperature rise of the probe.
Option B.	they must only be switched on for the minimum time required to check
serviceability.
Option C.	they should be switched on for five minutes to allow to stabilise before taking
ammeter readings.
Correct Answer is.		they must only be switched on for the minimum time required to check
serviceability.
Explanation.	NIL.
Question Number.		19.	A rotary knife edge ice detector provides warning of ice by.
Option A.	increased torque caused by ice formation slowing the rotating wheel and
illuminating a warning light in the cockpit.
Option B.	decreased torque caused by ice formation slowing the rotating wheel and
illuminating a warning light in the cockpit.
Option C.	ice formation stopping the rotation of a rotary knife edge and illuminating a
warning light in the cockpit.
Correct Answer is.		decreased torque caused by ice formation slowing the rotating wheel and

illuminating a warning light in the cockpit. OR increased torque caused by ice formation slowing the rotating wheel and illuminating a warning light in the cockpit. Explanation. Aircraft Electrical Systems, Pallett, page 174.

Question Number. 20. Windscreen heating is supplied from.

Option A. frequency wild generator, direct to the windscreen.

Option B. DC generator, via a transformer.

Option C. frequency wild generator, via a rectifier.

Correct Answer is. frequency wild generator, direct to the windscreen.

Explanation. Aircraft Electrical Systems, Pallett, page173, fig.1029.

Question Number.		21.	A wing thermal antiice annunciator is illuminated permanently in
flight deck without selection being made. The most probable cause would be.
Option A.	a short circuit.
Option B.	an open circuit.
Option C.	normal.
Correct Answer is.		a short circuit.
Explanation.	NIL.
Question Number.		22.	Air for antiicing of the wings is obtained from.
Option A.	air conditioning ducting.
Option B.	engine compressors.
Option C.	a combustion heater.
Correct Answer is.		engine compressors.
Explanation.	NIL.
Question Number.		23.	The usual material for pipelines in a fluid deice system.
Option A.	stainless steel.
Option B.	Monel.
Option C.	nylon.
Correct Answer is.		nylon.
Explanation.	NIL.
Question Number.		24.	When operating a windscreen wiper on the ground, make sure to.

Option A. use slow wiper only.

Option B. use water as lubricant when operating.

Option C. place soft cloth between blade and window.

Correct Answer is. use water as lubricant when operating.

Explanation. CAAIPs Leaflet 68 para 5.1.2.

Question Number.		25.	What is runback ice?.
Option A.	Glaze ice.
Option B.	Rime ice.
Option C.	Glime ice.
Correct Answer is.		Glaze ice.
Explanation.	AC20147.

11B.13. Landing Gear (ATA 32) (68)

Question Number.		1.	Spongy brakes are usually a result of.
Option A.	internal leakage.
Option B.	air in the system.
Option C.	external leakage.
Correct Answer is.		air in the system.
Explanation.	CAAIPs 58 Jeppesen A&P Technician Airframe Textbook Page 931.
Question Number.		2.	Over inflated tyres may cause damage to the.
Option A.	brake drum.
Option B.	wheel hub.
Option C.	wheel flange.
Correct Answer is.		wheel flange.
Explanation.	Jeppesen A&P Technician Airframe Textbook Page 132.
Question Number.		3.	A brake debooster valve is provided for.
Option A.	applying brake pressure slowly and releasing the the brakes quickly.
Option B.	increasing the pressure and applying the brakes rapidly.
Option C.	decreasing the pressure and slowly releasing the brakes.
Correct Answer is.		applying brake pressure slowly and releasing the the brakes quickly.
Explanation.	NIL.	www.adtl.army.mil/cgibin/atdl/fm/1509/ch10.html
Question Number.		4.	Tubeless tyres are stored.
Option A.	at 15 to 20 P.S.I.
Option B.	horizontally maximum of four high with smallest diameter tyre on top.
Option C.	vertically.
Correct Answer is.		vertically.
Explanation.	Jeppesen A&P Technician Airframe Textbook Page 947 CAIPs AL/318 15.1.
Question Number.		5.	On a wheel bogie unit, positive camber is when the.
Option A.	bottom of the wheels are closer together.
Option B.	top of the wheels are closer together.
Option C.	front of the wheels are closer together.
Correct Answer is.		bottom of the wheels are closer together.
Explanation.	Jeppesen A&P Technician Airframe Textbook Page 913.
Question Number.		6.	A badly corroded and pitted brake disk will.
Option A.	wear brake pads too quickly, and should be replaced.
Option B.	be serviceable, and provide better grip.
Option C.	produce a loss of fluid.
Correct Answer is.		wear brake pads too quickly, and should be replaced.
Explanation.	Badly corroded brakes should be replaced.
Question Number.		7.	How much oxygen is in a tyre (as a maximum)?.

Option A. 5% by pressure.

Option B. 15% by volume.

Option C. 5% by volume.

Correct Answer is. 5% by volume.

Explanation. AWN 70, and JAR 25.733.

Question Number.		8.	A tyre specification 32 x 10.7514. What does the 10.75 refer to.
Option A.	Section Width.
Option B.	Bead diameter.
Option C.	Overall diameter.
Correct Answer is.		Section Width.
Explanation.	CAIPs AL/318 3.1.
Question Number.		9.	When servicing an oleo, fluid comes out of the air valve when the
leg is depressurised?.

Option A. The leg is serviceable the separator has bottomed.

Option B. Leaking air/oil seals.

Option C. Separator plate stuck open.

Correct Answer is. The leg is serviceable the separator has bottomed.

Explanation. CAIPs AL/36.

Question Number.		10.	The type of fluid in an oleo strut will depend upon.
Option A.	type of fluid most readily available.
Option B.	the type of seal material.
Option C.	heat generated in operation of the system.
Correct Answer is.		heat generated in operation of the system.
Explanation.	The type of fluid in an oleo strut will depend upon heat generated in operation of
the system.

Question Number. 11. A restrictor valve.

Option A. speed up the flow in one direction.

Option B. may be used to slow down undercarriage extension.

Option C. restrict the extent of travel of the undercarriage.

Correct Answer is. may be used to slow down undercarriage extension.

Explanation. CAIPs AL/36 Page 7&8.

Question Number.		12.	The function of the oil in a shock absorber is to.
Option A.	ensure the separator does not bottom.
Option B.	damp the rebound.
Option C.	absorb the landing shock.
Correct Answer is.		damp the rebound.
Explanation.	Jeppesen A&P technician Airframe Textbook Page 95.

Question Number.		13.	The purpose of the flutter plate in a shock absorber is to.
Option A.	permit free flow of oil during compression and restriction of oil during extension.
Option B.	restrict the compression of the air.
Option C.	separate the oil from the air.
Correct Answer is.		permit free flow of oil during compression and restriction of oil during
extension.
Explanation.	NIL.
Question Number.		14.	Made up wheels should be stored.
Option A.	vertical at working pressure.
Option B.	vertical at 20/30 PSI charge.
Option C.	horizontal no more than 4 high.
Correct Answer is.		vertical at 20/30 PSI charge.
Explanation.	CAIPS AL318 para 151 and 153.
Question Number.		15.	“After MLG down and securely locked, a red light is illuminated
n the flight deck. The possible causes are.”
Option A.	shorted sensor.
Option B.	out of adjustment sensor.
Option C.	wiring problem.
Correct Answer is.		out of adjustment sensor.
Explanation.	Aircraft Electrical Systems Pallett Page 176.
Question Number.		16.	When checking for alignment of a MLG, check.
Option A.	symmetry, tracking, camber.
Option B.	symmetry, splay, tracking.
Option C.	symmetry, twist, tracking.
Correct Answer is.		symmetry, tracking, camber.
Explanation.	A+P Technician Airframe Textbook Page 913.
Question Number.		17.	These markings are found on a tyre32 x 10.45 R 14.What does the
number 32 mean?.
Option A.	Outer diameter.
Option B.	qwidth.
Option C.	Inner diameter.
Correct Answer is.		Outer diameter.
Explanation.	CAIPs AL/318 3.1.
Question Number.		18.	A green/grey dot marking on aircraft tyre casing represents.
Option A.	breather points.
Option B.	the light part of the tyre.
Option C.	military reference.
Correct Answer is.		breather points.

Explanation.	CAIPs AL/318 3.6, CAAIPs Leaflet 57 2.4.
Question Number.		19.	In detachable flange type wheels, the flange is secured by.
Option A.	a retainer plate.
Option B.	a lock ring.
Option C.	bolts.
Correct Answer is.		a lock ring.
Explanation.	CAIPs AL/318 4.7.1.
Question Number.		20.	Fuse plugs in aircraft tyres are.
Option A.	for over temperature protection.
Option B.	for overpressure protection.
Option C.	to deflate the tyre before removal.
Correct Answer is.		for overpressure protection.
Explanation.	AL/319 3.1.2 Fuse plugs protect the tyre from explosion due to overpressure,
albeit the overpressure as a result of temperature rise.
Question Number.		21.	A breaker strip in an aircraft tyre is.
Option A.	to provide strength.
Option B.	to provide a wear indication.
Option C.	to indicate the position for tyre levers.
Correct Answer is.		to provide strength.
Explanation.	NIL.	www.dunlopaircrafttyres.com/tyrecare/dm1172/dm1172.pdf
Question Number.		22.	If fluid leaks along with air whilst oleo charging, this is.
Option A.	caused by a leaky seal.
Option B.	normal.
Option C.	due to excessive charging pressure.
Correct Answer is.		caused by a leaky seal.
Explanation.	AL/36 3.3.3 iii.
Question Number.		23.	A red dot / triangle mark on aircraft tyres means.
Option A.	military reference.
Option B.	the light part of the tyre.
Option C.	breather points.
Correct Answer is.		the light part of the tyre.
Explanation.	CAIPs AL/318 3.6, CAAIPs Leaflet 57 3.7.
Question Number.		24.	On selection of MLG down, the gear extends then begins to retract
again. The cause is.
Option A.	a faulty selector valve.
Option B.	a faulty actuator.
Option C.	gear lowered at too high an airspeed.
Correct Answer is.		a faulty selector valve.

Explanation.	NIL.
Question Number.		25.	When fitting a tyre, the red dot should be positioned.
Option A.	on the other side of the wheel opposite to the charging valve.
Option B.	opposite the charging valve.
Option C.	adjacent to the charging valve.
Correct Answer is.		adjacent to the charging valve.
Explanation.	Dunlop Aircraft Tyres General Servicing Instructions Para 3.2.1.10.
Question Number.		26.	Composite brake units.
Option A.	weigh the same as normal brake units and fade away athigh temperatures.
Option B.	have less weight than normal brake units but fade away at high temperatures.
Option C.	have less weight than normal brake units and have increased efficiency at high
temperatures.
Correct Answer is.		have less weight than normal brake units and have increased efficiency at
high temperatures.
Explanation.	A&P Technician Airframe Textbook Page 920 ‘Carbon Brakes’.
Question Number.		27.	A restrictor valve can be used.
Option A.	to increase the speed of undercarriage retraction.
Option B.	to increase the speed of the undercarriage extension.
Option C.	to reduce the speed of the undercarriage extension.
Correct Answer is.		to reduce the speed of the undercarriage extension.
Explanation.	CAIPs AL/36 4.2.
Question Number.		28.	When an undercarriage is lowered, it tends to creep back up. The
fault could be.
Option A.	the emergency system.
Option B.	a leaky selector valve.
Option C.	a stuck relief valve.
Correct Answer is.		a leaky selector valve.
Explanation.	NIL.
Question Number.		29.	Vents holes are found on.
Option A.	tubeless tyres.
Option B.	tubed tyres.
Option C.	tubed and tubeless tyres.
Correct Answer is.		tubed and tubeless tyres.

Explanation. AL/318 2.4. A&P Technician Airframe Textbook Page 942 says both tubed and tubeless. So does Dunlop General Servicing Instructions.

Question Number.		30.	At what temperature does a yellow fuse plug melt at?.
Option A.	150°C.
Option B.	250°C.
Option C.	200°C.

Correct Answer is.		200°C.
Explanation.	Boeing 757 Carbon Brake wheel, Description and Operation 324282 Part
AHA1648 Yellow Plug			Temperature 390°F.
Question Number.		31.	The cam plate in a nose undercarriage is.
Option A.	part of the shimmy damper.
Option B.	to align for nose wheel on nose undercarriage retraction.
Option C.	for alignment of the nose wheel steering on nose undercarriage extension.
Correct Answer is.		to align for nose wheel on nose undercarriage retraction.
Explanation.	NIL.
Question Number.		32.	What is tyre creep related to?.
Option A.	Horizontal movement of the tyre.
Option B.	Vertical movement of the tyre.
Option C.	Tyre moving around the wheel.
Correct Answer is.		Tyre moving around the wheel.
Explanation.	Leaflet 57 Para 9
Question Number.		33.	Aquaplaning’ can be reduced by.
Option A.	increased flaring.
Option B.	lowering slats.
Option C.	an antiskid device.
Correct Answer is.		an antiskid device.
Explanation.	NIL.
Question Number.		34.	.Why is a hydraulic damper fitted to a nose wheel steering
system?.

Option A. To reduce vibration and shimmy.

Option B. To centralise the nose wheel during an up selection.

Option C. To centralise the nose leg assembly during an up selection.

Correct Answer is. To reduce vibration and shimmy.

Explanation. NIL.

Question Number.		35.	What decides the type of oil used in an undercarriage leg?.
Option A.	The material of the leg.
Option B.	The types of seals the leg uses.
Option C.	Neither, any oil can be used.
Correct Answer is.		The types of seals the leg uses.
Explanation.	NIL.
Question Number.		36.	In an antiskid system.
Option A.	brakes are modulated to give most efficient braking.

Option B. brakes release on rising torque.

Option C. brakes release on falling torque.

Correct Answer is. brakes are modulated to give most efficient braking.

Explanation. Jeppesen A&P Technician Airframe Textbook Page 1037.

Question Number.		37.	If an undercarriage oleo has insufficient deflection, the likely cause
is.
Option A.	oil level too high.
Option B.	loss of pressure/leakage.
Option C.	air pressure too high.
Correct Answer is.		air pressure too high.
Explanation.	NIL.
Question Number.		38.	A Maxaret is used in what system?.
Option A.	Tyre inflation.
Option B.	Skid control.
Option C.	Self centring landing gear.
Correct Answer is.		Skid control.
Explanation.	NIL.
Question Number.		39.	The pilot receives an audible warning on the flight deck as the
aircraft is descending to land. The most likely reason for this warning is.
Option A.	the airspeed is too high.
Option B.	the landing gear is not locked down.
Option C.	the rate of descent is too high.
Correct Answer is.		the landing gear is not locked down.
Explanation.	Jeppesen A & P Airframe Technician Textbook page 1012.
Question Number.		40.	A restrictor in the landing gear hydraulic retraction and lowering
system is positioned in the.
Option A.	landing gear up line.
Option B.	landing gear down line.
Option C.	return line from the landing gear selector.
Correct Answer is.		landing gear up line.
Explanation.	The restrictor is placed in the retraction line to slow the rate of exit of fluid from

the jack on extension, to slow the rate of extension. CAIPs AL/36 fig 4 sows them in the down line this is a well known error in CAIPs.

Question Number.

41.

Wheel speed information is used in auto speed brake systems.

Option A.

Option B.

to stow the spoilers automatically when the aircraft has nearly stopped.

to ensure the aircraft has touched down and to give a slight time lapse before

spoiler deployment.

Option C. to ensure the aircraft is still rolling.

Correct Answer is. to ensure the aircraft has touched down and to give a slight time lapse

before spoiler deployment.

Explanation. NIL.

Question Number.		42.	A fusible plug fitted to an aircraft wheel prevents.
Option A.	over inflation of tyres during servicing.
Option B.	brakes seizure, if brake stators and rotors weld together under excessive
temperatures.
Option C.	tyre bursts due to high temperatures created by excessive braking.
Correct Answer is.		tyre bursts due to high temperatures created by excessive braking.
Explanation.	CAAIPs Leaflet 58 para 3.1.3 and A&P Technician Airframe Textbook 96.
Question Number.		43.	If the shuttle valve was stuck in the normal position.
Option A.	neither system will be available.
Option B.	emergency braking will not be available.
Option C.	normal braking will not be available.
Correct Answer is.		emergency braking will not be available.
Explanation.	NIL.
Question Number.		44.	The breaker strip of a tyre is fitted.
Option A.	between the apex strip and the casing piles.
Option B.	between the bead and the casing piles.
Option C.	between the tread rubber and the casing piles.
Correct Answer is.		between the tread rubber and the casing piles.
Explanation.	CAAIP Leaflet 57 fig 1.
Question Number.		45.	Nose wheel steering in a modern aircraft is by.
Option A.	rudder pedals.
Option B.	the control column.
Option C.	a separate pilot operated control.
Correct Answer is.		a separate pilot operated control.
Explanation.	NIL.
Question Number.		46.	The fusible plugs installed in some aircraft wheel will.
Option A.	facilitate servicing of the wheel assembly.
Option B.	melt at a specified elevated temperature.
Option C.	eliminate the need to check air pressure
Correct Answer is.		melt at a specified elevated temperature.
Explanation.	NIL.
Question Number.		47.	Excessive wear in the shoulder area of an aircraft tyre is an

indication of.
Option A.	underinflation.
Option B.	overinflation.
Option C.	excessive toein.
Correct Answer is.		underinflation.
Explanation.	NIL.
Question Number.		48.	Ribbed tyres with marker tie bars may be worn to.
Option A.	the top of the tie bar.
Option B.	the base of the tie bar.
Option C.	1 mm from the rib base.
Correct Answer is.		the top of the tie bar.
Explanation.	NIL.
Question Number.		49.	On large aircraft, bogie type undercarriages are used to.
Option A.	spread the weight over a large area.
Option B.	absorb increased landing shock.
Option C.	prevent skidding.
Correct Answer is.		spread the weight over a large area.
Explanation.	NIL.
Question Number.		50.	To position the bogie beam at a suitable angle for retraction and
landing, a.
Option A.	castoring damper is used.
Option B.	snubber is used.
Option C.	hop damper is used.
Correct Answer is.		hop damper is used.
Explanation.	NIL.
Question Number.		51.	On large aircraft, braked wheel assemblies are normally inflated
with.
Option A.	nitrogen.
Option B.	an argon and CO2 mixture.
Option C.	nitrogen and not more than 5% of air.
Correct Answer is.		nitrogen and not more than 5% of air.
Explanation.	JAR 25.733 (e).
Question Number.		52.	Brake deboosters.
Option A.	increase the hydraulic pressure entering the brakes.
Option B.	reduce the hydraulic pressure entering the brakes.
Option C.	assist the operation of the antiskid unit.
Correct Answer is.		reduce the hydraulic pressure entering the brakes.
Explanation.	NIL.

Question Number.		53.	A modulator is fitted in conjunction with.
Option A.	brake control valves.
Option B.	nonreturn valve.
Option C.	antiskid units.
Correct Answer is.		antiskid units.
Explanation.	AL/321 6.6.
Question Number.		54.	In the case of pressurized aircraft, the nosewheel bay.
Option A.	is pressurized to a value higher than ambient but less than cabin pressure.
Option B.	is subject to cabin pressure.
Option C.	is not pressurized.
Correct Answer is.		is not pressurized.
Explanation.	NIL.
Question Number.		55.	An undercarriage that has the axle mounted directly onto the shock
absorber is of which type.
Option A.	Articulated.
Option B.	Hydro Mechanical.
Option C.	Direct Acting.
Correct Answer is.		Direct Acting.
Explanation.	NIL.
Question Number.		56.	The minimum aquaplaning ground speed is.
Option A.	9.6 times the root square of the tyre pressure in psi.
Option B.	8.6 times the root square of the tyre pressure in psi.
Option C.	8.6 times the tyre pressure in bar.
Correct Answer is.		8.6 times the root square of the tyre pressure in psi.
Explanation.		http://www.gremline.com/page13.html
Question Number.		57.	Tubed tyres are stored.
Option A.	horizontally, up to 4 in total staggering them to prevent distortion of beads.
Option B.	horizontally, up to 4 in total in a rack with supporting tubes so each tyre is
supported at 2 points.
Option C.	horizontally, up to 4 in total with the smallest at the top.
Correct Answer is.		horizontally, up to 4 in total in a rack with supporting tubes so each tyre is
supported at 2 points.
Explanation.	CAAIPs Leaflet 57 15.2.1 and 15.2.2.
Question Number.		58.	On a main landing gear, what is positive camber?.
Option A.	Top of wheels closer to fuselage.
Option B.	Front of wheels closer to fuselage.
Option C.	Bottom of wheels closer to fuselage.
Correct Answer is.		Bottom of wheels closer to fuselage.
Explanation.		http://www.desertrides.com/reference/terms.php#C

Question Number.		59.	When the landing gear is locked up, the cockpit indicator shows.
Option A.	red light.
Option B.	no indication.
Option C.	green light.
Correct Answer is.		no indication.
Explanation.	Jeppesen A & P Airframe Technician Textbook page 1012.
Question Number.		60.	When checking the alignment of a main landing gear, check.

Option A. symmetry, tracking, camber.

Option B. symmetry, tracking, twist.

Option C. symmetry, tracking, splay.

Correct Answer is. symmetry, tracking, camber.

Explanation. NIL.

Question Number.		61.	Tyre creep could be caused by.
Option A.	overpressure.
Option B.	excessive wear.
Option C.	under pressure.
Correct Answer is.		under pressure.
Explanation.	NIL.
Question Number.		62.	When inflating a tyre and you notice ice in the valve stem.
Option A.	heat the valve stem gently with a blow torch.
Option B.	wait for ice to melt before carrying on with inflation.
Option C.	carry on inflating as ice in the valve stem is no problem.
Correct Answer is.		wait for ice to melt before carrying on with inflation.
Explanation.	NIL.
Question Number.		63.	A method of helping to prevent aquaplaning is by fitting tyres
which have.
Option A.	water dispersing treads.
Option B.	a plain tread.
Option C.	twin contact.
Correct Answer is.		water dispersing treads.
Explanation.	NIL.
Question Number.		64.	Unmounted tubeless tyres must be stored.
Option A.	vertically.
Option B.	horizontally.
Option C.	in the manufactures boxes.
Correct Answer is.		vertically.

Explanation.	AL/318 15.1.
Question Number.		65.	With a single oleo leg with a stub axle used, the torque links will.
Option A.	keep the wheel in track.
Option B.	assist the wheel to castor.
Option C.	allow the wheel to shimmy.
Correct Answer is.		keep the wheel in track.
Explanation.	Jeppesen A & P Airframe Technician textbook page 912.
Question Number.		66.	When fitting a tyre to a hub, the red spot on the tyre should be in
line with.
Option A.	maker’s serial number.
Option B.	the valve assembly.
Option C.	opposite side to the valve assembly.
Correct Answer is.		the valve assembly.
Explanation.	Jeppesen A & P Airframe Technician Textbook page 949.
Question Number.		67.	A red or yellow line on an inner tube would indicate.
Option A.	light spot.
Option B.	balance indicator.
Option C.	heavy spot.
Correct Answer is.		heavy spot.
Explanation.	NIL.
Question Number.		68.	On a multibrake unit with automatic adjusters, brake wear is
checked by.
Option A.	using a gono go gauge to measure the gap between the cylinder and the thrust
plate.

Option B. application of the brakes and checking indicator pin protrusion.

Option C. measuring the protrusion of the indicator pins with the brakes released.

Correct Answer is. application of the brakes and checking indicator pin protrusion.

Explanation. Dunlop component maintenance manual Ch. 324298.

11B.14. Lights (ATA 33) (37)

Question Number.		1.	With aircraft lights which of the following is true?.
Option A.	Starboard light green, port light red, tail light white.
Option B.	Starboard light red, port light green, tail light Red.
Option C.	Starboard light red, port light green, tail light White.
Correct Answer is.		Starboard light green, port light red, tail light white.
Explanation.	Pallett Aircraft Electrical Systems 3rd Edition Page 145.
Question Number.		2.	Emergency floor lighting system is inoperative, then.
Option A.	the aircraft is not allowed to fly until repaired.
Option B.	the aircraft is allowed to fly in daylight conditions only.

Option C. the aircraft is allowed to fly empty to a main base.

Correct Answer is. the aircraft is allowed to fly empty to a main base.

Explanation. Can fly without passengers in accordance with the MEL. No reference found.

Question Number.		3.	A fluorescent tube contains.
Option A.	orange coatings, rare gases and mercury vapour.
Option B.	phosphor coatings, rare gases and mercury vapour.
Option C.	iodine coatings and rare gases.
Correct Answer is.		phosphor coatings, rare gases and mercury vapour.
Explanation.		http://www.users.mis.net/~pthrush/lighting/flour.html
Question Number.		4.	A white steady light is required.
Option A.	of at least 3 candelas, at the rear of the aircraft 70 degrees either side of dead
astern.

Option B. of at least 3 lumens, at the rear of the aircraft 110 degrees either side of dead astern.

Option C. of at least 3 candelas, at the rear of the aircraft 110 degrees either side of dead astern.

Correct Answer is. of at least 3 candelas, at the rear of the aircraft 70 degrees either side of dead astern.

Explanation. CAP 393 Rules of the Air Rule 11 (2) (a) (iii).

Question Number. 5. How many floor path lights can you fly with unserviceable?.

Option A. 15%.

Option B. 25%.

Option C. 20%.

Correct Answer is. 25%.

Explanation. AWN 56 2.11.

Question Number.		6.	What is the arc of a landing light?.
Option A.	15°.
Option B.	11°.
Option C.	20°.
Correct Answer is.		11°.
Explanation.	Pallett Aircraft Electrical Systems 3rd Edition Page 146 Fig 101.
Question Number.		7.	The visible angle of a white tail navigation light is.
Option A.	11°.
Option B.	140°.
Option C.	110°.
Correct Answer is.		140°.

Explanation. Pallett Aircraft Electrical Systems 3rd Edition Page 146, and JAR 25.1387.

Question Number.		8.	Wing navigation lights must be visible through which angle?.
Option A.	110°.
Option B.	125°.
Option C.	180°.
Correct Answer is.		110°.
Explanation.	Aircraft Electrical Systems Pallett Page 146, and JAR 25.1387, and EEL/110 301
a).
Question Number.		9.	Cockpit dome lighting is provided by the.
Option A.	battery bus and ground services bus.
Option B.	battery bus.
Option C.	ground services bus.
Correct Answer is.		battery bus and ground services bus.
Explanation.	Aircraft Electricity and Electronics, Eismin 5th edition page 256.
Question Number.		10.	Upper and lower strobe lights are coloured.
Option A.	green.
Option B.	red.
Option C.	white.
Correct Answer is.		red.
Explanation.	Transport Category Aircraft Systems Jeppesen Page 72.
Question Number.		11.	Cargo bay lights on a modern aircraft are supplied by.
Option A.	AC handling bus.
Option B.	DC handling bus.
Option C.	the battery bus.
Correct Answer is.		AC handling bus.
Explanation.	BAe 146 AMM (AC ground service busbar) although other aircraft (A340, B747)
use 28VDC ground bus.
Question Number.		12.	What will happen if the Master Dim and test switch is switched to
the on position?.
Option A.	Rectangular indicator lights will illuminate.
Option B.	All lights will illuminate.
Option C.	Dome lights will illuminate.
Correct Answer is.		Rectangular indicator lights will illuminate.
Explanation.	NIL.
Question Number.		13.	Escape route lighting must not have more than.
Option A.	20% obscured.

Option B.	10% obscured.
Option C.	15% obscured.
Correct Answer is.		20% obscured.
Explanation.	NIL.
Question Number.		14.	How many emergency lights are allowed to be inoperative?.
Option A.	25%.
Option B.	10%.
Option C.	None.
Correct Answer is.		25%.
Explanation.	JAR 25.812 (l) (1), and CAAIPs Leaflet 511 2.11.1.
Question Number.		15.	The angle of a runway turnoff light is.
Option A.	40°.
Option B.	60°.
Option C.	50°.
Correct Answer is.		50°.
Explanation.	Aircraft Electrical Systems Pallett Page 146.
Question Number.		16.	Cabin fluorescent lighting circuits are supplied with.
Option A.	28 V DC.
Option B.	115 V AC.
Option C.	28 V AC.
Correct Answer is.		115 V AC.
Explanation.	Jeppesen A&P Technician Airframe Textbook Page 776 (figure 7115).
Question Number.		17.	How are passenger reading lights normally tested?.
Option A.	Each one is switched on individually at passenger panel.
Option B.	By using a READ LIGHT TEST switch at any passenger panel.
Option C.	By using a READ LIGHT TEST switch on the cabin attendant panel.
Correct Answer is.		Each one is switched on individually at passenger panel.
Explanation.	NIL.
Question Number.		18.	In what position should the selector switch be for a standby and
emergency lighting system during flight.
Option A.	Armed.
Option B.	OFF.
Option C.	ON.
Correct Answer is.		Armed.
Explanation.	Transport Category Aircraft Systems 1123.
Question Number.		19.	The emergency lighting system must be designed so that after any

single transverse vertical separation of the fuselage during crash landing the maximum amount

of emergency lighting that fails is.

Option A.	15%.
Option B.	10%.
Option C.	25%.
Correct Answer is.		25%.
Explanation.	JAR 25.812.
Question Number.		20.	A rotating beacon must have a minimum light rating of.
Option A.	100 candelas.
Option B.	50 candelas.
Option C.	20 candelas.
Correct Answer is.		20 candelas.
Explanation.	CAP 393 Section 2 Rules of the Air Para. 11 (2) (d).
Question Number.		21.	Service lights include.
Option A.	refuelling lights, engine scanning lights, logo lights.
Option B.	avionics bay lights, engine scanning lights, baggage compartment lights.
Option C.	baggage compartment lights, avionics bay lights, refuelling lights.
Correct Answer is.		baggage compartment lights, avionics bay lights, refuelling lights.
Explanation.	EEL/110 3.5.
Question Number.		22.	If the ‘blowback’ device on a landing lamp operates, how is it
reset?.

Option A. The linkage must be repositioned and latched when the aircraft is on the ground.

Option B. Select full ‘RETRACT’.

Option C. It cannot. The unit must be replaced because of the high stress loads experienced.

Correct Answer is. Select full ‘RETRACT’.

Explanation. EEL/110 3.3.1.

Question Number.		23.	Before touching or disconnecting a strobe light head, a time period
must elapse to avoid electrical shock or burning. That time period is at least.
Option A.	2 minutes.
Option B.	5 minutes.
Option C.	1 minute.
Correct Answer is.		2 minutes.
Explanation.	EEL/110 5.5.
Question Number.		24.	The rear light of an aircraft must be white and, in addition, must
show through an inclusive angle of.
Option A.	110 degrees and be 5 candelas minimum.
Option B.	110 degrees and be 40 candelas minimum.
Option C.	140 degrees and be 3 candelas minimum.
Correct Answer is.		140 degrees and be 3 candelas minimum.
Explanation.	CAP 393 Section 2 Rules of the Air Para 2 a iii and CAIPs EEL/110 3.1 c).
Question Number.		25.	Selfilluminating signs.

Option A. are instantly seen in dark areas by persons who are not dark adapted.

Option B. require a period of daylight, or intense artificial light to operate.

Option C. are self powered and contain phosphor and helium gas.

Correct Answer is. are instantly seen in dark areas by persons who are not dark adapted.

Explanation. EEL/110 4.8.

Question Number. 26. When an annunciator light is selected to ‘DIM’, the resistor is in.

Option A. parallel with the light and the transistor is not conducting.

Option B. series with the light and the transistor is not conducting.

Option C. series with the light and the transistor is conducting.

Correct Answer is. series with the light and the transistor is conducting.

Explanation. The transistor is conducting all the time the light is switched on. Pallett Aircraft Electrical Systems. Page 153.

Question Number. 27. Storm lights are usually fluorescent lights that are switched on.

Option A. because lightning has less effect on fluorescent lamp units.

Option B. and the glareshield lights are automatically dimmed.

Option C. to reduce the effect of lightning on the pilot’s sight.

Correct Answer is. to reduce the effect of lightning on the pilot’s sight.

Explanation. NIL. http://www.flightsim.com/cgi/kds?$=main/special/real777

Question Number.		28.	Captain and First Officer’s ‘Dome’ lights can be dimmed.
Option A.	individually they are wired in parallel.
Option B.	together they are wired in series.
Option C.	First Officer’s only in emergency mode.
Correct Answer is.		together they are wired in series.
Explanation.	Pallett Aircraft Electrical Systems. Page 153.
Question Number.		29.	In the CWS system, the caution light is coloured.
Option A.	red.
Option B.	amber.
Option C.	green.
Correct Answer is.		amber.
Explanation.	CAIPs EEL/110 4.4.1.
Question Number.		30.	On a CWS, which has the highest priority?.
Option A.	Fire warning.
Option B.	Hydraulic pump failure.
Option C.	Duct overheat.
Correct Answer is.		Fire warning.
Explanation.	NIL.

Question Number.		31.	What inert gas is used in a typical strobe light?.
Option A.	Freon.
Option B.	Halon.
Option C.	Xenon.
Correct Answer is.		Xenon.
Explanation.	NIL.
Question Number.		32.	Floor proximity lighting is a mandatory requirement and each light
should be spaced.
Option A.	at 60 inch intervals.
Option B.	at 70 inch intervals.
Option C.	at 40 inch intervals.
Correct Answer is.		at 40 inch intervals.
Explanation.	CAAIPs Leaflet 511 2.7.1.
Question Number.		33.	Tritium Gas is used in a.
Option A.	strobe light.
Option B.	landing Light.
Option C.	self illuminating lights.
Correct Answer is.		self illuminating lights.
Explanation.	EEL/110 4.8.1.
Question Number.		34.	A strobe light is a light unit that takes form of glass tube filled with
which gas and its light colour is what?.
Option A.	Xenon Gas and bluewhite.
Option B.	Helium gas and white.
Option C.	Neon gas and blue.
Correct Answer is.		Xenon Gas and bluewhite.
Explanation.	EEL/110 3.2.3.
Question Number.		35.	The aircraft has a partial failure of its emergency lighting system.

Option A. continue with reduced passenger load.

Option B. ferry flight to main base for rectification.

Option C. ground the aircraft.

Correct Answer is. continue with reduced passenger load.

Explanation. A club66 user who got this question, queried it with the CAA. He was told (by the CAA assessor)that the answer is b. However, no reference has been found.

Question Number. 36.

Option A. Dual circuit.

Option B. Single circuit.

Navigation lights are supplied by the following circuit.

Option C. Individual circuits.

Correct Answer is. Single circuit.

Explanation. Aircraft Electricity and Electronics Eismin Page 250.

Question Number.		37.	Automatic no smoking sign will illuminate.
Option A.	below 10,000ft and descending.
Option B.	when landing gear doors are not closed.
Option C.	when landing gear is up.
Correct Answer is.		below 10,000ft and descending.
Explanation.	NIL.

11B.15. Oxygen (ATA 35) (62)

Question Number.		1.	Anoxia is due to.
Option A.	lack of oxygen.
Option B.	low air pressure on the body.
Option C.	release of nitrogen bubbles in the blood.
Correct Answer is.		lack of oxygen.
Explanation.	CAAIPs Leaflet 59 Para 2.1.
Question Number.		2.	The dilutor demand regulator functions.
Option A.	all the time.
Option B.	only when the supply valve is opened by the user.
Option C.	when the user breathes in.
Correct Answer is.		when the user breathes in.
Explanation.	Jeppesen A&P Technician Airframe Textbook Page 1410.
Question Number.		3.	To measure moisture in an oxygen system use.
Option A.	a glass plate.
Option B.	litmus paper.
Option C.	a hygrometer using the dew point method.
Correct Answer is.		a hygrometer using the dew point method.
Explanation.	CAIPs AL/325 Para 6.4.
Question Number.		4.	Oxygen cylinder test dates.
Option A.	are painted in white on the cylinder.
Option B.	are variable depending on discharge.
Option C.	may be stencilled on the neck of the cylinder.
Correct Answer is.		are painted in white on the cylinder.

Explanation.	CAIPs AL/325 para 4.2.2.
Question Number.		5.	02 system pressure has leaked away after charging. What is the
most probable cause?.
Option A.	Supernumerator regular.
Option B.	Temperature compensator.
Option C.	Breathing regulator.
Correct Answer is.		Breathing regulator.
Explanation.	NIL.
Question Number.		6.	If an O2 system is leaking, where would you most likely find the
cause?.

Option A. Thermal Relief Valve.

Option B. Loose connection.

Option C. Breathing mask.

Correct Answer is. Loose connection.

Explanation. No TRV on O2 system. Breathing mask will only leak if system is turned on.

Question Number. 7. As the cabin altitude reaches 3042 metres.

Option A. the 02 masks deploy automatically and the crew activates the system from the emergency panel.

Option B. the 02 masks deploy automatically and hang half way extended.

Option C. the 02 masks deploy automatically and the crew must activate the system from the cockpit.

Correct Answer is.		the 02 masks deploy automatically and hang half way extended.
Explanation.
Question Number.		8.	Oxygen cylinders are normally fitted with.
Option A.	pressure and quantity gauges.
Option B.	oxygen purity gauge.
Option C.	temperature gauge.
Correct Answer is.		pressure and quantity gauges.
Explanation.	CAAIPs Leaflet 59 p9 para 4.9.
Question Number.		9.	A demand regulator in a portable oxygen bottle opens.
Option A.	all the time.
Option B.	when breathing.
Option C.	when 100% selected.
Correct Answer is.		when breathing.
Explanation.	A&P Technician Airframe Textbook 149.
Question Number.		10.	Portable oxygen bottles are fitted with.
Option A.	a demand regulator.
Option B.	an overpressure indicator.
Option C.	an over temperature indicator.

Correct Answer is.		a demand regulator.
Explanation.	NIL.
Question Number.		11.	American made crew oxygen cylinders are.
Option A.	black in colour with a RH thread.
Option B.	green in colour with a LH thread.
Option C.	green in colour with a RH thread.
Correct Answer is.		green in colour with a RH thread.
Explanation.	CAAIP\’s Leaflet 59 p7 para 4.2.3 states green for cylinders for American origin.
(l/h threads are for charging points).
Question Number.		12.	Which connector has a left hand thread?.
Option A.	N2.
Option B.	Freon.
Option C.	O2.
Correct Answer is.		O2.
Explanation.	CAAIP Leaflet 59 para 5.13.3(e).
Question Number.		13.	What is the principle of an O2 generator?.
Option A.	Sodium chlorate and iron mixed by an electronic detonator.
Option B.	Sodium chlorate and iron using a mechanical detonator producing O2 when
mixed with air.
Option C.	Sodium chloride and iron mixed by an electronic detonator.
Correct Answer is.		Sodium chlorate and iron mixed by an electronic detonator.
Explanation.	CAIPs AL/325 3.5.1.
Question Number.		14.	What pressure are oxygen cylinders usually pressurised to?.
Option A.	300 PSI.
Option B.	1800 PSI.
Option C.	3000 PSI.
Correct Answer is.		1800 PSI.

Explanation. AL/325 4.2, and CAAIPs Leaflet 59 3.3.1 and A&P Technician Airframe Textbook 148.

Question Number.		15.	Oxygen storage cylinders, once charged should be.
Option A.	turned on by crew.
Option B.	turned off.
Option C.	turned on and safety wirelocked.
Correct Answer is.		turned on and safety wirelocked.
Explanation.	NIL.

Question Number.		16.	A thermal compensator is used in.
Option A.	a fuel system.
Option B.	an oxygen system.
Option C.	an hydraulic system.
Correct Answer is.		an oxygen system.
Explanation.	CAIPs AL/325 4.12.
Question Number.		17.	When charging an oxygen bottle with gaseous oxygen, the oxygen
is.

Option A. passed into the bottle slowly to keep the temperature at approximately ambient.

Option B. passed into the bottle at any rate as this does not affect temperature.

Option C. passed into the bottle as quickly as possible to keep the temperature down. Correct Answer is. passed into the bottle slowly to keep the temperature at approximately ambient.

Explanation. A&P Mechanic Airframe Handbook Page 598.

Question Number.		18.	Where are the left handed threads found in an oxygen system?.
Option A.	Line valve.
Option B.	Shutoff valve.
Option C.	Charging connection.
Correct Answer is.		Charging connection.
Explanation.	CAAIP Leaflet 59 para 5.13.3(e).
Question Number.		19.	Portable O2 diluter demand valve works when.
Option A.	the user breathes in.
Option B.	100% is selected.
Option C.	less than 500 psi is in bottle.
Correct Answer is.		the user breathes in.
Explanation.	A&P Technician Airframe Textbook 149.
Question Number.		20.	A double headed oxygen pressure regulator is used for.
Option A.	additional flightcrew.
Option B.	changes in altitude.
Option C.	extra supply in case of emergency.
Correct Answer is.		additional flightcrew.
Explanation.	NIL.
Question Number.		21.	If an aircraft suddenly drops pressure at 14, 000 ft.
Option A.	passenger must get mask from overhead stowage.

Option B. masks drop automatically.

Option C. attendant must drop masks.

Correct Answer is. masks drop automatically.

Explanation. Transport Category Aircraft Systems 88.

Question Number.		22.	How do oxygen cylinders show over pressure?.
Option A.	Green rupturing disc.
Option B.	Audible warning.
Option C.	Red rupturing disc.
Correct Answer is.		Green rupturing disc.
Explanation.	AL/325 4.13.
Question Number.		23.	The life of an aircraft oxygen cylinder is.
Option A.	2 years.
Option B.	10 years.
Option C.	5 years.
Correct Answer is.		5 years.

Explanation. Jeppesen A & P Technician Airframe Textbook page 148 or CAAIP\’s Leaflet 59 p16.

Question Number. 24. A discharged chemical generator is indicated by.

Option A. a protruding pin.

Option B. a change in colour.

Option C. a broken telltale wire.

Correct Answer is. a change in colour.

Explanation. AL/325.

Question Number.		25.	A chemical oxygen generator has a supply duration of at least.
Option A.	15 minutes.
Option B.	30 minutes.
Option C.	5 minutes.
Correct Answer is.		15 minutes.
Explanation.	AL/325, and A&P Technician Airframe Textbook 148 and CAAIPs Leaflet 59
3.6.3 and JAR 25.1439.
Question Number.		26.	The oxygen line service valve must be.
Option A.	wire locked open.
Option B.	wire locked closed.
Option C.	only be wire locked with telltale wire.
Correct Answer is.		wire locked open.
Explanation.	AL/325.
Question Number.		27.	Oxygen equipment must be carried by aircraft capable of flying
above.
Option A.	4,000 ft.

Option B.	10,000ft.
Option C.	8,000ft.
Correct Answer is.		10,000ft.
Explanation.	AL/325 3.1.
Question Number.		28.	The critical altitude for oxygen requirement is approximately.
Option A.	38,000 ft.
Option B.	25,000 ft.
Option C.	4,000 ft.
Correct Answer is.		25,000 ft.
Explanation.	AL/325 Table 1.
Question Number.		29.	If oxygen is not being supplied in normal flight conditions, the
cabin altitude must be.
Option A.	at a maximum of 12,000 ft.
Option B.	at or below 8,000 ft.
Option C.	below 10,000 ft.
Correct Answer is.		at or below 8,000 ft.
Explanation.	CAIPs AL/323.
Question Number.		30.	Pressure breathing systems must be used at altitudes.
Option A.	above 40,000 ft.
Option B.	below 40,000 ft.
Option C.	above 30,000 ft.
Correct Answer is.		above 40,000 ft.
Explanation.	AL/325 table 1.
Question Number.		31.	In a diluter demand oxygen system.
Option A.	oxygen is supplied with a continuous pressure flow.
Option B.	each member of the crew has a continuous oxygen supply.
Option C.	each member of the crew has a regulator.
Correct Answer is.		each member of the crew has a regulator.
Explanation.	AL/325 fig 3.
Question Number.		32.	In a continuous flow oxygen system, oxygen is supplied.
Option A.	only when the supply has been regulated by the pilot.
Option B.	on passenger inhaling into the mask.
Option C.	when the mask is plugged into the socket.
Correct Answer is.		only when the supply has been regulated by the pilot.
Explanation.	NIL.
Question Number.		33.	In the diluter demand oxygen system, selection of emergency on

this regulator will result in.

Option A. 100% oxygen at positive pressure.

Option B. 100% oxygen continuous flow at positive pressure.

Option C. 100% oxygen supply as the user inhales.

Correct Answer is. 100% oxygen continuous flow at positive pressure.

Question Number.		34.	The cylinder of a portable oxygen set is made of.
Option A.	aluminium.
Option B.	stainless steel.
Option C.	alloy steel.
Correct Answer is.		alloy steel.
Explanation.	AL/325 3.6.
Question Number.		35.	Portable oxygen cylinders are normally charged to.
Option A.	1,800 p.s.i.
Option B.	2,000 p.s.i.
Option C.	1,200 p.s.i.
Correct Answer is.		1,800 p.s.i.
Explanation.	AL/325 3.6.
Question Number.		36.	Rate of flow of oxygen is given in.
Option A.	pounds/minute.
Option B.	litres/pounds.
Option C.	litres/minute.
Correct Answer is.		litres/minute.
Explanation.	NIL.
Question Number.		37.	Oxygen cylinders are removed for overhaul and tested.
Option A.	every 3 years.
Option B.	every 6 years.
Option C.	every 4 years.
Correct Answer is.		every 4 years.
Explanation.	AL/325 5.8.
Question Number.		38.	Oxygen bottle capacity varies between.
Option A.	80 2250 litres.
Option B.	100	3200 litres.
Option C.	200	2250 litres.
Correct Answer is.		80	2250 litres.
Explanation.	AL/325 4.2.

Question Number.		39.	Oxygen bottle test and working pressures can be found.
Option A.	stamped on a metal label.
Option B.	stencilled on the bottle.
Option C.	stamped on the neck ring.
Correct Answer is.		stamped on the neck ring.
Explanation.	AL/325 4.2.2 and Leaflet 59 5.9.
Question Number.		40.	After installation, the oxygen bottle on/off valve is.
Option A.	left in the ‘on’ position.
Option B.	left in the ‘off’ position until required.
Option C.	wire locked in the ‘on’.
Correct Answer is.		wire locked in the ‘on’.
Explanation.	CAAIP\’s Leaflet 59 para 5.6.2 (h).
Question Number.		41.	Dangerous pressure rise in oxygen cylinders.
Option A.	is relieved by a bursting disc.
Option B.	is relieved by a thermostat.
Option C.	is relieved by under pressurising the bottle.
Correct Answer is.		is relieved by a bursting disc.
Explanation.	AL/325 4.13.
Question Number.		42.	To avoid condensation forming in an oxygen cylinder.
Option A.	cylinder pressure is left at 300/400 p.s.i.
Option B.	cylinder pressure is left at 100/200 p.s.i.
Option C.	cylinder pressure is left at 200/300 p.s.i.
Correct Answer is.		cylinder pressure is left at 200/300 p.s.i.
Explanation.	AL/325 5.5.1 ii).
Question Number.		43.	What determines the material used for oxygen pipe lines?.
Option A.	The whims of the aircraft designer.
Option B.	The length of the pipe runs.
Option C.	The pressure used in the system.
Correct Answer is.		The pressure used in the system.
Explanation.	AL/325 4.3.
Question Number.		44.	The direction of flow in an oxygen non return valve is indicated.
Option A.	by visual inspection.
Option B.	by colour coding.
Option C.	by an arrow.

Correct Answer is. by an arrow.

Explanation. AL/325 Page 8.

Question Number.		45.	Oxygen filters are made of.
Option A.	carbon fibres.
Option B.	steel wool.
Option C.	sintered bronze.
Correct Answer is.		sintered bronze.
Explanation.	AL/325 Page 8.
Question Number.		46.	Satisfactory operation of the oxygen systems is indicated by.

Option A. flow indicators.

Option B. pressure indicators.

Option C. lack of Anoxia.

Correct Answer is. flow indicators.

Explanation. CAAIP’s Leaflet 59 p9 para 4.11.

Question Number.		47.	If a binding thread needs attention on an oxygen system.
Option A.	Teflon tape may be used.
Option B.	distilled water may be used sparingly.
Option C.	no lubricant may be used whatsoever.
Correct Answer is.		Teflon tape may be used.
Explanation.	NIL.
Question Number.		48.	The international marking for a breathing oxygen pipeline is a
series of.
Option A.	diamonds.
Option B.	dots.
Option C.	rectangles.
Correct Answer is.		rectangles.
Explanation.	NIL.
Question Number.		49.	Cylinders containing purified oxygen for breathing are painted.
Option A.	black with a white collar.
Option B.	black.
Option C.	white with a black collar.
Correct Answer is.		black with a white collar.
Explanation.	ZAL/325 4.2.2.
Question Number.		50.	A suitable leak detecting solution for use on oxygen systems is.

Option A.	leak testing solution to Spec. MILL25567B.
Option B.	soapy water.
Option C.	grease free medical soap.
Correct Answer is.		leak testing solution to Spec. MILL25567B.
Explanation.	AL/325 5.7.1, AL/321 3. http://www.chemsol.com/chemsol/lubricants.html
Question Number.		51.	When charging an oxygen bottle with gaseous oxygen, the oxygen
is.

Option A. passed into the bottle as quickly as possible to keep the temperature down.

Option B. passed into the bottle slowly to keep temperature at approximately ambient.

Option C. passed into the bottle at any rate as this does not affect temperature. Correct Answer is. passed into the bottle slowly to keep temperature at approximately ambient.

Explanation. AL/325 5.12.2 (vi).

Question Number.		52.	In areas closely associated with oxygen systems, particular care
must be taken to avoid leaving.
Option A.	traces of oils or greases.
Option B.	acrylic based plastic materials.
Option C.	magnesium particles.
Correct Answer is.		traces of oils or greases.
Explanation.	A&P Technician Airframe Textbook Chapter 1419 rh column 2nd para.
Question Number.		53.	When working in the vicinity of an oxygen system.
Option A.	the area must be well ventilated.
Option B.	no electrical power must be used.
Option C.	oil must not come into contact with the system.
Correct Answer is.		oil must not come into contact with the system.
Explanation.	NIL.
Question Number.		54.	A chemical oxygen generator operates at.
Option A.	45°C at 10 psi for 15 minutes.
Option B.	45°F at 10 psi for 15 minutes.
Option C.	45°K at 10 psi for 15 minutes.
Correct Answer is.		45°C at 10 psi for 15 minutes.
Explanation.	AL/325 3.5.2.
Question Number.		55.	When charging an oxygen bottle in situ.
Option A.	charge in accordance with the temperature/pressure graph.

Option B. charge slowly through a water trap.

Option C. slacken off the retaining straps first.

Correct Answer is. charge in accordance with the temperature/pressure graph.

Explanation. AL/325 5.12.2 (vi) (a).

Question Number.		56.	The gauge fitted to an oxygen bottle indicates.
Option A.	pressure.
Option B.	temperature.
Option C.	purity.
Correct Answer is.		pressure.
Explanation.	AL/325 4.2.
Question Number.		57.	The application of thread lubrication tape in an oxygen system
should be.
Option A.	applied to all except the first two threads and not more than 3 complete wraps of
tape.
Option B.	applied to all except the first two threads and not more than one complete wrap of
tape.

Option C. applied to all the threads and not more than one complete wrap of tape. Correct Answer is. applied to all except the first two threads and not more than 3 complete wraps of tape.

Explanation. CAAIPs Leaflet 59 Para 5.7.

Question Number.		58.	High pressure lines in oxygen systems are made of.
Option A.	stainless steel.
Option B.	aluminium alloy.
Option C.	titanium.
Correct Answer is.		stainless steel.
Explanation.	CAAIPs Leaflet 59 p8 para 4.3.1.
Question Number.		59.	Lubricate oxygen connector threads using.
Option A.	hellerene.
Option B.	Teflon tape.
Option C.	WD40.
Correct Answer is.		Teflon tape.
Explanation.	NIL.
Question Number.		60.	How is an expended chemical oxygen generator indicated?.
Option A.	A pressure seal would be broken.
Option B.	By a change in colour of heat sensitive paint.

Option C. The indicator pin would be protruding.

Correct Answer is. By a change in colour of heat sensitive paint.

Explanation. NIL.

Question Number.		61.	Oxygen purging is a process of.
Option A.	pressure testing the system.
Option B.	measuring the flow rate from the regulator.
Option C.	removing moisture from the system.
Correct Answer is.		removing moisture from the system.
Explanation.	CAAIPs Leaflet 59 p19 para 6.
Question Number.		62.	To check an oxygen system for moisture.
Option A.	a sniff test is used.
Option B.	a hygrometer is used.
Option C.	pass 72 litres/min through a filter paper in a clean glass.
Correct Answer is.		a hygrometer is used.
Explanation.	CAAIP\’s Leaflet 6.4.1.
11B.16. Pneumatic/Vacuum (ATA 36) (10)
Question Number.		1.	When the moisture separator is purged in a pneumatic system, it
dumps.
Option A.	just the moisture trap.
Option B.	the whole system.
Option C.	the system between compressor and regulator valve.
Correct Answer is.		just the moisture trap.
Explanation.	Jeppesen A&P Technician Airframe Textbook Page 854. CAIPs AL/322.
Question Number.		2.	The pneumatic system pump is a.
Option A.	centrifugal type.
Option B.	rotor vane type.
Option C.	piston type.
Correct Answer is.		piston type.
Explanation.	Jeppesen A&P Technician Airframe Textbook Page 856, Although smaller
systems may have avane type.
Question Number.		3.	In a pneumatic system, the maintainer valve will be fitted in supply
lines to.
Option A.	essential equipment.
Option B.	all equipment.

Option C. nonessential equipment.

Correct Answer is. nonessential equipment.

Explanation. CAIPs AL/322. Maintainer valves work in same way as those in hydraulic systems (hence the reference). Although they protect the flow to the essential systems, they do so by being situated in the nonessential lines, and closing off if the pressure drops.

Question Number.		4.	High pressure pneumatic source is a.
Option A.	reciprocating pump.
Option B.	centrifugal Compressor.
Option C.	butterfly pump.
Correct Answer is.		reciprocating pump.
Explanation.	CAIPs AL/323 4.1.
Question Number.		5.	High pressure pneumatic pump is a.
Option A.	reciprocating pump.
Option B.	spur gear.
Option C.	butterfly pump.
Correct Answer is.		reciprocating pump.
Explanation.	CAIPs AL/323 4.1.
Question Number.		6.	If the pneumatic water drain trap is left open for a long time it will
drain.
Option A.	between the compressor and the PRV.
Option B.	just the moisture trap.
Option C.	all the system.
Correct Answer is.		between the compressor and the PRV.
Explanation.	CAIPs AL/322 Fig 1.
Question Number.		7.	On a high pressure pneumatic system, if the drain plug for oil and
water is left open for long periods of time, the system would.
Option A.	lose pressure from the compressor side only.
Option B.	lose pneumatic pressure partially.
Option C.	lose all pressure.
Correct Answer is.		lose pressure from the compressor side only.
Explanation.	AL/322 figure 1.
Question Number.		8.	Two compressors driven by separate engines use.
Option A.	Interconnected to share loads.
Option B.	NRVs to prevent compressors driving each other.
Option C.	PRVs.

Correct Answer is.		NRVs to prevent compressors driving each other.
Explanation.	NIL.
Question Number.		9.	What is important about the air entering a dry air pump?.
Option A.	It must be filtered.
Option B.	It must be pressure controlled.
Option C.	It must be temperature controlled.
Correct Answer is.		It must be filtered.
Explanation.	NIL.	http://www.avweb.com/news/maint/1829051.html
Question Number.		10.	What type of compressor is used on a pneumatic system?.
Option A.	Rotary vane type.
Option B.	Spur gear type.
Option C.	Positive displacement type.
Correct Answer is.		Positive displacement type.
Explanation.	NIL.
11B.17. Water/Waste (ATA 38) (9)

Question Number.		1.	Toilet flush motor is protected from overheat by.
Option A.	thermal protection.
Option B.	water cooling.
Option C.	cooling fan on timer switch.
Correct Answer is.		thermal protection.
Explanation.	AWN 57.
Question Number.		2.	What is the purpose of thermal protection on electric toilet motor?.

Option A. Prevent motor overheating and become fire hazard.

Option B. Prevent toilet freezing.

Option C. Stop motor running beyond 10 seconds if timer become unserviceable.

Correct Answer is. Prevent motor overheating and become fire hazard.

Explanation. AWN 57 Para.2.3.

Question Number. 3.

Option A. are not heated.

Waste water drain masts.

Option B. are heated using low amperage in the Air and on ground.

Option C. are heated using low amperage with the aircraft on ground only.

Correct Answer is. are heated using low amperage with the aircraft on ground only.

Explanation. 737 AMM ch. 3071 28VAC on ground and 115VAC in air.

Question Number. 4. the seal of the valve is replaceable without draining the tanks.

Option A. the seal of the valve is replaceable without draining the tanks.

Option B. the tank must be defuelled.

Option C. the seal is not replaceable, the whole drain assembly must be replaced.

Correct Answer is. the seal of the valve is replaceable without draining the tanks.

Explanation. NIL.

Question Number.		5.	Drinking water pipes are prevented from freezing by.
Option A.	installation of neoprene foam insulation.
Option B.	wrapping the pipes with heated tapes or ribbons.
Option C.	placing the pipes adjacent to hot water piping.
Correct Answer is.		wrapping the pipes with heated tapes or ribbons.
Explanation.	NIL.
Question Number.		6.	Toilets are the subject of.
Option A.	AWN 83.
Option B.	AWN 79.
Option C.	AWN 80.
Correct Answer is.		AWN 83.
Explanation.	All the AWNs listed have now been removed. Download an old copy from the
Forum.
Question Number.		7.	Toilet waste valves are.
Option A.	not spring loaded.
Option B.	spring loaded open.
Option C.	spring loaded closed.
Correct Answer is.		spring loaded closed.
Explanation.	NIL.
Question Number.		8.	The heater used on a drain mast would be a.
Option A.	induction heater.
Option B.	hot air blower.
Option C.	ribbon heater.
Correct Answer is.		ribbon heater.
Explanation.	NIL.
Question Number.		9.	A toilet recirculation fan is unserviceable in flight.

Option A. Close toilet until landing.

Option B. You can use the toilet as the toxic chemical toilet.

Option C. It can be overcome by thermal compensating device.

Correct Answer is. Close toilet until landing.

Explanation. IAW B737400 mmel/ddg item 382, the associate lavatory system may be inop. with lav door secured closed and placard ‘INOPERATIVE DO NOT ENTER’. Toilet recirc fan is part of the lav system.

11B.18.

Question Number.		1.	Primary Radar is.
Option A.	for ground use only.
Option B.	reflected signal from aircraft’s own radar.
Option C.	interrogation of aircraft’s transponder.
Correct Answer is.		for ground use only.
Explanation.	NIL.
Question Number.		2.	A battery in situ on an aircraft charges at a fairly constant rate
because generator voltage remains constant.
Option A.	may charge slowly if initial battery voltage is low.
Option B.	may charge at an excessive rate if initial battery voltage is low.
Option C.
Correct Answer is.		may charge at an excessive rate if initial battery voltage is low.
Explanation.	NIL.
Question Number.		3.	To parallel an alternating current generator with one or more other
generators, phase A must be.
Option A.	inphase with other generators and CBA only.
Option B.	90 degrees outofphase and ABC.
Option C.	inphase with other generators and ABC.
Correct Answer is.		inphase with other generators and CBA only.
Explanation.	NIL.
Question Number.		4.	On an unparalleled twin generator alternating current system, the
phase of the second generator to be brought on line.
Option A.	must be inphase prior to paralleling.
Option B.	is important if the first generator fails.
Option C.	is unimportant.
Correct Answer is.		must be inphase prior to paralleling.
Explanation.	NIL.

Question Number.		5.	When an autopilot is Fail Passive,.
Option A.	the aircraft reverts to fail operational autopilot.
Option B.	the pilot must resume control and land the aircraft.
Option C.	the autoland can continue.
Correct Answer is.		the pilot must resume control and land the aircraft.
Explanation.	Pallett Automatic Flight Control p211.
Question Number.		6.	On the direct current short shunt generator circuit shown, output

voltage at the load is 200V. What is the voltage across the shunt winding?.

Option A. 200V.

Option B. 206V.

Option C. 212V.

Correct Answer is. 200V.

Explanation. The 10 ohm shunt, 0.06 ohm and the 0.04 ohm are the field windings. The generator output is split between the 0.06 ohm and the 100 ohm load, but only by 0.06/100x 200V = 0.12V (across the 0.06 ohm). So the voltage across the shunt winding is closer to 200V than the other two answers.

Question Number.		7.	On a direct current circuit, current limiters.
Option A.	prevent excessive current to the field circuit.
Option B.	allow excessive current to the load circuit.
Option C.	prevent excessive current to the load circuit.
Correct Answer is.		prevent excessive current to the load circuit.
Explanation.	NIL.

Question Number.		8.	On a direct current twin generator system, the paralleling relay
contacts close when the oncoming generators voltage is.
Option A.	above bus voltage.
Option B.	below bus voltage.
Option C.	the same as bus voltage.
Correct Answer is.		above bus voltage.
Explanation.	NIL.
Question Number.		9.	On an aircraft’s navigation displays, distance measuring equipment
gives.
Option A.	height and range to beacon.
Option B.	ground range to beacon.
Option C.	slant range to beacon.
Correct Answer is.		slant range to beacon.
Explanation.	NIL.
Question Number.		10.	On a modern aircraft flight instrument display system, Radio
deviation is shown on.
Option A.	EADI.
Option B.	EHSI & EADI.
Option C.	EHSI.
Correct Answer is.		EHSI & EADI.

Explanation. Radio deviation is VOR or ILS. The deviation indicator is duplicated. It is on the EHSI and EADI.

Question Number.			11.	On a flight management system, the database is updated every.
Option A.	2	Months.
Option B.	3	Months.
Option C.	1	Month.
Correct Answer is.			1 Month.
Explanation.	NIL.
Question Number.			12.	The decision height light will illuminate when.
Option A.	the decision height is selected.
Option B.	the aircraft’s indicated altitude is above decision height.
Option C.	the aircraft’s indicated altitude is below decision height.
Correct Answer is.			the aircraft’s indicated altitude is above decision height.
Explanation.	NIL.

Question Number.		13.	In a Central Air Data Computer (CADC) system, Mach
information is derived from.
Option A.	indicated airspeed and altitude.
Option B.	pitot and static pressures.
Option C.	indicated air speed and total air temperature.
Correct Answer is.		indicated airspeed and altitude.
Explanation.	NIL.
Question Number.		14.	In a Central Air Data Computer (ADC), the rate of climb of an
aircraft is produced in the.
Option A.	Indicated Airspeed Module.
Option B.	Mach Module.
Option C.	Altitude Module.
Correct Answer is.		Altitude Module.
Explanation.	NIL.
Question Number.		15.	In a Central Air Data Computer, altitude is produced from.
Option A.	static air pressure.
Option B.	pitot air pressure.
Option C.	pitot air pressure and total air temperature.
Correct Answer is.		static air pressure.
Explanation.	NIL.
Question Number.		16.	In a Central Air Data Computer (ADC), Indicated Air Speed (IAS)
is produced from.
Option A.	pitot pressure only.
Option B.	pitot and static air pressure.
Option C.	static pressure only.
Correct Answer is.		pitot and static air pressure.
Explanation.	NIL.
Question Number.		17.	In a Central Air Data Computer (CADC) system, True Air Speed
(TAS) is derived from the Mach information and.
Option A.	Static Air Pressure.
Option B.	Pitot Air Pressure.
Option C.	Total Air Temperature.
Correct Answer is.		Total Air Temperature.
Explanation.	NIL.

Module 11B – Piston Aeroplane Aerodynamics, Structures and Systems

Module 11B - Piston Aeroplane Aerodynamics, Structures and Systems

Module 11B - Piston Aeroplane Aerodynamics,
Structures and Systems