Aeropeep – Aircraft and Engineering Forum

1. How do you check a chain for elongation? 

#     a) Apply a load, measure chain and use 2% max formula to check extension 

       b) Apply a load, measure chain and use 5% max formula to check extension 

       c) Hang the chain under its own weight, measure chain and use 2% max formula to check extension 

 

2. How do you store a chain? 

      a) Lay uncoiled and flat in greaseproof paper 

      b) Hanged so they do not kink 

#    c) Oiled and coiled in greaseproof paper  

 

3. An HT lead is 

#    a) single core screened 

      b) multi core screened 

      c) single core unscreened 

 

4. Two parts of the adhesive process are

#   a) wetting and setting 

     b) wetting and gripping 

     c) spreading and setting 

 

5. A 14 gauge cable when compared to an 18 gauge cable has

      a) lower current rating 

#    b) higher current rating 

      c) the same current rating 

 

6. Types of adhesive joints are

      a) cemented and specific 

#    b) mechanical and specific  

      c) mechanical and cemented 

 

7. What tests are done on adhesive joints?

      a) impact and shear 

      b) impact and peel 

#    c) peel and shear 

 

8. An interconnect cable has what insulation? 

#    a) thinner than airframe cable 

      b) thicker than airframe cable 

      c) same thickness as airframe cable 

 

9. Epicyclic gears are used on 

#    a) shafts rotating on the same axis 

      b) shafts rotating on offset axis 

      c) shafts rotating on axis 90 degrees from each other 

 

10. What is the effect of heat on a cold cure resin? 

       a) Increase pot life 

#     b) Decrease pot life 

       c) No effect on pot life 

 

11. Forming a solution treated rivet gives it 75% of its hardness.  What gives it the other 25%?  

      a) Put them in a refrigerator 

      b) Precipitation treat the component when forming is complete 

#    c) Leave at room temperature for four hours 

 

12. What two components of a three part polyester resin are dangerous to mix together directly? 

#    a) Accelerator and free catalyst 

      b) Catalyst and resin 

      c) Accelerator and resin 

 

13. What is the effect of adding too much hardener to a resin?

       a) The resin will not harden 

#     b) Makes the repair more brittle 

       c) No effect 

 

14. How many times can clad alloy be treated?

#    a) 3 times 

      b) as many times as required 

      c) Once only 

 

15. Two parts of the adhesive process are

#     a) wetting and setting 

       b) wetting and gripping 

       c) spreading and setting 

 

16. What is the largest hole in honeycomb repairable with microballoons?

 #    a) 2.54 cm   

       b) 2.54 inches 

       c) 2.54 mm  

 

17. If  D or DD rivets are not broached in time , or removed from the freezer in time, they

#    a) must be re-heat treated before use 

      b) can be re-heat treated once then discarded 

      c) must be discarded 

 

18. How are flexible hoses categorised?

       a) by length 

#     b) by maximum pressure 

       c) by diameter 

 

19. A joggle in a removed rivet is indication of what type of partial failure?

#     a) shear 

       b) bearing 

       c) compression 

 

20. Over extended honeycomb can bend in which direction? 

      a) In all directions 

      b) Across the ribbon 

#    c) Along the ribbon 

 

21. The vacuum connections in a fibre glass repair must overlap the 

#     a) breather mat 

       b) peel ply 

       c) top layer of glass fabric directly 

 

22. The pattern of a gear is the 

      a) profile of the gear teeth 

#    b) mark it leaves on a mating gear 

      c) the path they take when the gear is rotating 

 

23. How do you check a turnbuckle is in safety?

#    a) Use the inspection hole or count the threads showing 

      b) Ensure that the turnbuckle cannot be turned by hand 

      c) Make sure no threads are showing at either end of the turnbuckle 

 

24. Max temperature of tin coated copper cable?

#    a) 105oC 

      b) 200oC 

      c) 260oC 

 

25. The taper of a standard taper pin is

      a) 1 in 36 

      b) 1 in 20 

#    c) 1 in 48 

 

26. Spherical roller bearings resist what loads?

 #    a) Large radial and moderate thrust 

      b) Large thrust and moderate radial 

      c) Large radial but no thrust 

 

27. What are the signs of fretting corrosion?

#    a) black powder or cocoa staining 

      b) intergrannular cracking 

      c) flaking 

 

28. Plug pins are numbered

      a) from the outside in – clockwise 

      b) from the inside out – anticlockwise 

#    c) from the inside out – clockwise 

 

29. What are the rigid pipes on gas turbine engines made from? 

      a) aluminium alloy

      b) copper 

#    c) stainless steel 

 

30. Equipment wire 

#    a) is flexible and suitable for soldering 

      b) can be used for interconnect wiring 

      c) has thicker insulation than interconnect wire 

 

31. In the wiring code shown, what does the number 6 (4th number from the left) represent?

1EF6B22 NMS V

      a) Cable size 

#    b) Cable number 

      c) Circuit function 

 

32. An aluminium oxide layer on a conductor will do what when the temperature is increased? 

#    a) Become thicker 

      b) Become thinner 

      c) Remain the same 

 

33. When not under load where should a pair of gears sit?

#    a) In the middle 

      b) On the heel 

      c) On the toe 

 

34. For a pair of gears to operate properly, they must have 

#    a) lash and pattern 

      b) end play and thrust 

      c) pattern and profile 

 

35. Coil springs are made from

#    a) carbon or high alloy steels with low working stress 

      b) carbon or alloy steels with high working stress 

      c) low carbon steels with high working stress 

 

36. What is a coaxial cable? 

#    a) Two or more conductors 

      b) A twisted pair of conductors  

      c) A single conductor 

 

37. What is the nominal length of a UNF bolt?

#    a) Under head to screw threads (i.e. plain shank) 

      b) Under head to end of the threads 

      c) The length of the threads 

 

38. How is a British al alloy rivet identified?

       a) Natural anodised finish 

       b) Violet anodic finish 

#     c) Black anodic finish 

 

39. What do you do if you forget to add hardener to a composite repair? 

#    a) Clean all traces of the resin away and start again 

      b) Add hardener at the edges and it will cure 

      c) It will cure eventually anyway 

 

40. ‘X’ on a cable indicates 

      a) emergency power 

      b) control system 

#    c) AC power 

 

41. A BS rivet made from L36 would be what colour and marking? 

#    a) Black anodic with an ‘A’

      b) Green anodic with an ‘X’

      c) Natural anodic with no marking

 

42. The teeth on the smaller wheel of a bevel gear are called the 

       a) heel 

#     b) toe 

       c) foot 

 

43. What must you be careful with a hot stamped cable?

#     a) Wet arc tracking 

       b) Corrosion 

       c) Peeling of the insulation 

 

44. Where should you not use a nyloc nut?

       a) Temperatures above 200oC 

#     b) Temperatures above 120oC 

       c) Temperatures above 80oC 

 

45. What is the nominal screw length?

      a) The overall length of a bolt (from under the head) and the overall length of a screw (including the head) 

#    b) The overall length of a countersunk screw and the non-threaded portion of a bolt 

      c) The length of thread for a bolt, overall length for a countersunk screw 

 

46. The correct meshing of gears is found on what part of the tooth?

     a) Top 

#   b) Middle 

     c) Bottom 

 

47. What type of gear would be used on a prop reduction gearbox?

#   a) Epicyclic 

     b) Bevel 

     c) Split epicyclic 

 

48. What is the effect of aluminium oxide on aluminium electrical cable? 

     a) Provides strength 

     b) Reduces resistance 

#   c) insulates 

 

49. What is the effect of precipitation heat treatment on aluminium?

#   a) It speeds up age hardening process 

     b) It softens the material to allow it to be worked 

     c) It delays the age hardening process 

 

50. How do you assemble a banjo hose? 

#   a) Put washer either side of the banjo 

     b) Put a washer on the outside of the banjo only 

     c) Put a washer on the inside of the banjo only 

 

51. The pitch of a screw thread is 

     a) crest to root 

#   b) crest to crest 

     c) 2 x crest to root 

 

52. A single start thread the lead is 

     a) 2 x pitch 

#   b) 1 x pitch 

     c) ½ x pitch 

 

53. How would you test a hydraulic hose?

      a) Pressure test 1.0 x working pressure 

#    b) Pressure test 1.5 x working pressure 

      c) Pressure test 2.0 x working pressure 

 

54. A unified thread is identified by

#   a) 2 or 3 rings on the head 

     b) a raise ring on the head 

     c) an ‘X’ on the head 

 

55. A wire thread insert tap is

     a) slightly larger than the hole 

#   b) supplied in a fitting kit 

     c) slightly smaller than the hole 

 

56. Aluminium exposed to air will 

     a) oxidise and become weaker 

     b) oxidise and become stronger 

#   c) oxidise and become electrically insulated 

 

57. What do the letters and numbers on a British rivet mean? 

      a) material and finish 

      b) material specification only 

#    c) head shape, material and finish 

 

58. A natural finish aluminium alloy rivet with a D on it is

#   a) duralumin L37 

     b) aluminium L36 

     c) hiduminium L86 

 

59. A 5% magnesium rivet is identified by

     a) violet anodise with ‘S’ on it 

#   b) green anodise with ‘X’ on it 

     c) black anodise with ‘A’ on it 

 

60. Why would you use microballoons as a filler? 

      a) It cross-links with the panel 

      b) It is the cheapest filler material 

#    c) it is the lightest filler material 

 

61. Black streaks back from a rivet hole signify 

     a) galvanic corrosion 

#   b) fretting 

     c) intergrannular corrosion 

 

62. An AN steel bolt is identified by what marking on the head? 

     a) 14E 

#   b) An ‘X’ 

     c) A dash 

 

63. What care should you take with 2024-T3?

     a) Do not bend at sharp angles 

#   b) Do not scratch or make nicks in it 

     c) Do not remove the surface of the sheet metal 

 

64. When using a backing former on a composite repair you need to use

#     a) cellophane 

       b) breather cloth 

       c) a vacuum bag 

 

65. Heater mats should overlap the repair  by

      a) 4” 

      b) 6” 

#    c) 2” 

 

66. When using a spring washer, the plane washer would be fitted 

     a) between head a spring 

     b) under the nut 

#   c) between spring and part 

 

67. Composition of silver solder is

      a) tin and lead 

      b) tin, lead and silver 

#    c) tin, lead, silver and antimony 

 

68. How many times can you use a locking plate?

#   a) As long as it remains serviceable 

     b) Once only 

     c) Until all the tabs have been broken off 

 

69. Wire locking approach angles should not be less than

#   a) 45o

     b) 90o 

     c) 10o 

 

70. Where would you find the inspection interval for chains? 

      a) Maintenance manual 

#    b) Maintenance schedule 

      c) Flight manual 

 

71. What amperage is an 18 swg cable? 

#    a) 10 amp 

      b) 5 amp 

      c) 1 amp 

 

72. A thermoplastic fibre reinforced composite is prepared by 

      a) etching 

      b) a solvent wipe 

#    c) corona method 

 

73. A British close tolerance bolt is identified by

#   a) a raised ring on the head 

     b) a dropped collar under the head 

     c) an ‘X’ on the head 

 

74. A blind fastener described as external sleeve and internally threaded would be

     a) a cherry lock 

#   b) a jo bolt 

     c) a rivnut 

 

75. A co-axial cable is better than a normal cable because

#    a) there is an electrostatic field around it which helps to reduce the electromagnetic field 

      b) weight for weight it can carry more signal 

      c) it has less resistance 

 

76. A 0.5 in. diameter pipe is to be joined using standard nuts and fittings.  What coupling would you use?

      a) AN8-8852-2 

#    b) AN8-8852-8 

      c) AN8-8852-1 

 

77. What metal is suitable for riveting magnesium alloy? 

     a) Monel metal 

     b) 1100 aluminium alloy 

#   c) 5056 aluminium alloy 

 

78. What metal is suitable for riveting alloy steel

#   a) monel metal 

     b) mild steel 

     c) aluminium alloy 

 

79. What is the danger if a silver coated connector comes into contact with glycol de icing fluid

 #   a) Fire hazard 

      b) Corrosion 

      c) Wet arc tracking 

 

80. When silver coated connectors are used in unpressurised parts of the aircraft 

#   a) corrosion can occur 

     b) wet track arcing can occur 

     c) separation of the coating can occur

 

81. When a steel part is welded, corrosion occurs because 

#    a) the strip has become anodic 

      b) it is affected by spatter 

      c) the paint has been removed 

 

82. Intergrannular corrosion 

#   a) may have no visual surface indication 

     b) can be recognized by a grey powder deposit 

     c) can be recognized by its flaking and lifting of the material layers 

 

83. If aluminium alloy is not quenched after heat treatment is it will be 

#    a) brittle 

      b) subject to corrosion 

      c) malleable  

 

84. Anodizing protects alloy metal from corrosion and does what else?

#   a) Makes a good surface for paint to adhere to 

     b) Makes the surface alkaline 

     c) Seals the surface from moisture 

 

85. Active flux does what?

#   a) Cleans 

     b) Protects 

     c) Both cleans and protects 

 

86. Jointing compound is used for what reason? 

     a) To make the components easier to disassemble 

     b) To bond the components together 

#   c) To prevent dissimilar metal corrosion 

 

87. During vacuum bag lay-up the vacuum gauge is placed where?

      a) Next to the vacuum port 

#    b) Opposite side to the vacuum port 

      c) Over the repair 

 

88. An aluminium alloy rivet identification is

#   a) D embossed 

     b) X embossed 

     c) O embossed 

 

89. Rivet allowance is 

#   a) 1.5d 

     b) 1.5d plus the thickness of the material 

     c) 1d plus the thickness of the material 

 

90. D and DD rivets are refrigerated to 

#    a) retard age hardening 

      b) increase age hardening 

      c) precipitation harden 

 

91. What do you do to 2017 and 2024 rivets after heat treatment? 

#    a) Use immediately or refrigerate 

      b) Leave for a minimum of 2 hours before using 

      c) refrigerate for a minimum of 2 hours before using 

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92. Stepped curing has 

#   a) more than 2 dwell periods 

     b) variable cure time 

     c) no constant dwell period 

 

93. To prevent damage to seals on fitment you would 

     a) use grease 

     b) compress and stretch them 

#   c) use a cardboard protector over the threaded portions 

 

94. Maximum repair dimensions for use of microballoons? 

#    a) 10mm 

      b) 20mm 

      c) 30mm 

 

95. In an autoclave what pressure would the vacuum alarm be set at 

     a) operating pressure 

     b) higher than operating pressure 

#   c) lower than operating pressure 

 

96. Fibre strength is strongest in the direction of the

#   a) warp 

     b) weft 

     c) bias 

 

97. In an autoclave what would you cover the repair in?

#   a) High temp nylon 

     b) Polythene 

     c) Polypropelene 

 

98. If caustic soda turns a material black what is it?

     a) Aluminium 

     b) Alclad 

#   c) Aluminium alloy 

 

99. Intergrannular corrosion is caused by

#   a) improper heat treatment 

     b) dissimilar metal contact 

     c) improperly assembled components 

 

100. Galvanic action caused by dissimilar metal contact may best be prevented by 

#     a) applying a non-porous dielectric material between the surfaces 

       b) priming both the surfaces with a light coat of zinc chromate primer 

       c) Special precautions are not required if they are properly bonded 

 

101. Corrosion caused by electrolytic action is the result of 

     a) excessive anodization 

#   b) contact between two unlike metals 

     c) the wrong quenching agent 

 

102. A spring type washer when used on an aluminium component must be used 

     a) by itself 

     b) with a tab washer 

#   c) with a plain washer 

 

103. Nickel alloy steel split pins can be used

     a) repeatedly provided they remain a good fit 

#   b) only once, because the legs are spread and bent 

     c) with a spring washer and a stiff nut 

 

104. The standard taper for a taper pin is

     a) 1:20 

#   b) 1:48 

     c) 1:600 

 

105. Corrosion may be regarded as the destruction of metal by

 #   a) electrochemical action 

      b) electromechanical action 

      c) hydroelectric action 

 

106. Tempering steel gives

     a) greater hardness 

     b) greater brittleness 

#   c) relief of internal stress after hardening 

 

107. After welding, stainless steel is susceptible to  a corrosion known as

 #  a) weld decay 

     b) weld rot 

     c) weld deterioration 

 

108. The lifting or flaking of the metal at the surface due to delamination of grain boundaries caused by the pressure of corrosion is 

     a) electrolysis 

     b) transgranulation 

#   c) exfoliation 

 

109. The addition of chromium to steel will produce

     a) toughness 

     b) ductility 

#   c) hardness 

 

110. A feather key locates a gear on a shaft and permits 

      a) a positive and strong drive for transmissions 

#    b) positive drive and axial movement 

      c) positive drive with the gear firmly locked 

 

111. A pre-load indicating washer is correctly loaded when 

     a) the inner ring rotates 

#   b) the outer ring is gripped 

     c) the inner ring is gripped 

 

112. What chemical is used to identify aluminium alloys 

#   a) caustic soda 

     b) copper sulphate 

     c) nitric acid 

 

113.  Multi-start threads

#   a) increase the lead without increasing the pitch 

     b) increase the lead and the pitch 

     c) increase the lead and decrease the pitch 

 

114. Pure aluminium is 

#   a) highly resistant to corrosion 

     b) not resistant to corrosion 

     c) reasonably resistant to corrosion 

 

115. Cylinder containing purified oxygen for breathing are painted

     a) black with a grey collar 

#   b) black with a white collar 

     c) grey with a white collar 

 

116. Buttress threads are used

      a) to transmit power in both directions 

#    b) to transmit power on one direction 

      c) on nuts and bolts 

 

 117. The electrolytic process that forms an oxide film on the surface of aluminium alloys is known as

      a) electroplating  

      b) galvanizing 

#    c) anodizing 

 

118. Studs which have a size larger thread at one end are called

 #    a) stepped studs 

       b) plain studs 

       c) shouldered studs

 

119. The conductor in tersil cable is

     a) tinned copper 

#   b) nickel plated copper 

     c) stainless steel 

 

120. A cable is marked NYVIN 22.  The 22 represents the  

     a) current rating 

     b) current/weight ratio 

#   c) cross sectional area 

 

121. Copper is an inferior conductor to aluminium when comparing 

#    a) weight for weight 

      b) CSA with CSA 

      c) load for load 

 

122. Chromium added to plain carbon steel 

     a) turns it into a non-ferrous alloy 

     b) makes the metal softer 

#   c) increases it’s resistance to corrosion 

 

123. The purpose of case hardening is to

#   a) produce a hard case over a tough core 

     b) introduce carbon into the steel 

     c) reduce the carbon in the steel 

 

124. What is the indication of fretting corrosion on aluminium alloy?

#   a) Black powder 

     b) Brown powder 

     c) White powder 

 

125. Exfoliation corrosion is sometimes referred to as

 #   a) layer corrosion 

      b) sub-surface corrosion 

      c) filiform corrosion 

 

126. What action is taken to protect integral tanks from corrosion due to micro-biological growth?

 #   a) A biocidal additive is used in the fuel 

      b) The inside of the tank is coated with yellow chromate 

      c) Rubber liners are installed in the tank 

 

 127. When dissimilar metals are brought together, or the same metal in different states, one metal forms the anode and the other the cathode.  Which will suffer from corrosion?

      a) The cathode 

      b) Both will corrode equally 

#    c) The anode 

 

128. What type of corrosion attacks grain boundaries of aluminium alloys which are improperly or inadequately heat treated? 

      a) Stress corrosion 

#    b) Intergrannular corrosion 

      c) Surface corrosion 

 

129. British aircraft cables are classified by their 

      a) diameter and breaking load in Hundredweights 

#    b) breaking load in hundredweights 

      c) breaking loads in lbf, where 1 lbf = 4.448N 

 

130. An American rivet with a cross on the head is 

     a) 2117 aluminium alloy 

#   b) 5056 aluminium alloy 

     c) 2124 aluminium alloy 

 

131. A countersunk rivet of the ‘SP’ series has a head style of 

     a) 90o

#   b) 100o 

     c) 20o

 

132. The lead on a single start thread is 

     a) 1/2 the pitch 

#   b) 1 x the pitch 

     c) 2 x the pitch 

 

133. The coding of a British rivet indicates

      a) head type and colour 

      b) length and diameter 

#    c) material and head type 

 

134. At normal temperatures HC steel is harder because

     a) it has more austenite 

     b) it has less austenite 

#   c) of the % of carbon in the granules 

 

135. When mixing resin it is dangerous to add

#    a) accelerator and catalyst before resin 

      b) catalyst and resin before accelerator 

      c) resin and accelerator before catalyst 

 

136.  Silver plated copper wire has a maximum working temp of

#   a) 200 oC 

     b) 250 oC 

     c) 300 oC 

 

137. In an autoclave to apply pressure

     a) weights are used 

#   b) a vacuum bag is used 

     c) clamps are used 

 

138. Precipitation treating makes the metal

     a) harder, stronger and more ductile 

#   b) harder, stronger and less ductile 

     c) less strong and hard 

 

139. The artificial production of a film of hydroxide on the surface of aluminium or any of its alloys is commonly called

       a) alodizing 

       b) parco lubrizing 

#     c) anodizing 

 

140. Intergrannular corrosion in structural aluminium alloy parts 

     a) are not likely to occur in parts fabricated from heat-treated sheet aluminium 

     b) may be detected by the white, powdery deposit formed on the surface of the metal 

#   c) cannot always be detected by surface indications 

 

141. Corrosion will spread more rapidly when metals are exposed to 

#    a) high temperatures 

      b) dry climates 

      c) cold climates 

 

142. A material has the code 2024-TH6 on it.  Which part of the code indicates the percentage of the alloying element? 

#   a) 20 

     b) H 

     c) 6 

 

143. A worm drive creates

     a) a drive in 2 planes and 2 directions 

     b) a drive in 1 plane but 2 directions 

#   c) a drive in 2 planes but 1 direction 

 

144. Colour identification of an aluminium rivet is

#   a) black 

     b) violet 

     c) green 

 

145. A factor which determines the minimum space between rivets is the

     a) length of the rivets being used 

#   b) diameter of the rivets being used 

     c) thickness of the material being riveted 

 

146. Joggles in removed rivet shanks would indicate partial

     a) bearing failure 

     b) torsion failure 

#   c) shear failure  

 

147. The teeth of a gear would normally be

     a) nitrided 

#   b) case hardened 

     c) tempered 

 

148. A rivet that has 5% magnesium is identified as

#   a) anodic green and has an X 

     b) anodic violet and has an X 

     c) natural and has an m 

 

149. If a chain is removed for routine maintenance

     a) it must be proof checked to ½ max load 

     b) it must be proof checked to full load 

#   c) it does not have to be proof checked 

 

150. Magnesium alloy components are protected by

     a) an electro process 

#   b) a chemical process 

     c) a painted process 

 

151. Corrosion products should be removed from magnesium alloys by the use of 

#   a) a solution of 10% by weight of chromic acid in distilled water with 0.1% by volume of sulphuric acid* 

     b) aluminium wool 

     c)  a solution of 10% by volume of chromic acid in distilled water with 1% phosphoric acid

 

152. If it is necessary to remove corrosion from a steel component in-situ, the base of a suitable solution for this purpose is 

      a) chromic acid 

      b) nitric acid 

#    c) phosphoric acid 

 

153. A type of protection which is applicable to magnesium alloys is the 

     a) phosphate process 

     b) coslettising process 

#   c) chromating process 

 

154. Heavy corrosion deposits on clad aluminium alloys should be removed

      a) mechanically using a pneumatic vibrator 

      b) chemically by use of trichloroethylene 

#    c) chemically by use of phosphoric acid 

 

155. What action should be taken on finding intergrannular corrosion?

     a) De-corrode and reprotect 

     b) Renew corroded area by patching 

#   c) Replace complete component part 

 

156. Black streaks running away from a bolt or rivet would indicate

 #    a) fretting corrosion 

       b) exfoliation corrosion 

       c) intergrannular corrosion 

 

157. Identification of British aluminium alloys is with

       a) a letter and number code 

#     b) a colour and number stamped on the head 

       c) a part number on the head 

 

158. On gear teeth, the wear pattern should be

      a) the top edge most worn 

      b) the middle of the tooth most worn 

#    c) even 

 

159. on bevel gear teeth, the wear pattern should be

      a) greatest at the toe, tapering off to the heel 

      b) greatest at the heel, least at the toe 

#    c) at the centre of the tooth 

 

160. Anodic treatment of aluminium alloy gives 

#   a) a pure coating of aluminium oxide on the surface 

     b) a shorter life due to hardening 

     c) a purple finish 

 

161. Cables are preferred to other control systems because 

#   a) they are strong and light 

     b) they maintain slight mechanical advantage over push/pull systems 

     c) single braid allows for 2 way directions 

 

162. If you can only gain limited access to both sides of a structure, what would you use to repair the structure? 

#   a) A hylok 

     b) A pop rivet 

     c) A blind rivet 

 

163. Aluminium alloy with primarily magnesium is numbered

 #   a) 5025 

      b) 2025 

      c) 1025 

 

164. Heat treatment is shown on an aluminium alloy by a

 #   a) letter code 

      b) number code 

      c) letter and number code 

 

165. Bevel gears are

#    a) all over case hardened 

      b) toe is hardened 

      c) heel is hardened 

 

166. Nitriding is

 #   a) case hardening 

      b) anodising 

      c) tempering 

 

167. Alloy rivets are heat treated by

     a) annealing 

     b) anodising 

#   c) solution treating 

 

168. When a solid rivet is formed it only holds 75% of its shear strength, the other 25% comes from 

     a) heating the completed assembly 

     b) cooling completed assembly 

#   c) leaving assembly for 4 days to age harden 

 

169. For an electrical cable to be fireproof it must be able to stand 1100o C for

      a) 10 mins 

#    b) 15 mins 

      c) 20 mins 

 

170. Oxide on exposed silver plated wires is

     a) non corrosive 

#   b) an insulator 

     c) a conductor 

 

171. Turnbuckles depending on type are locked by

 #   a) locknuts and wire 

      b) stiffnuts 

      c) castleated nuts and splitpins 

 

172. For a wire insert thread repair, the hole is tapped using

      a) the next size up 

#    b) a special tap supplied with the kit 

      c) the same size 

 

173. To install a flareless coupling

 #   a) turn until torque is felt plus 2 flats 

      b) turn until torque is felt plus 3 flats 

      c) hand tight plus 2 flats 

 

174. Flexible pipes are identified by

      a) diameter 

      b) length 

#    c) material 

 

175. A pipe carrying lubricant would be identified by the colour

      a) white 

      b) white and yellow 

#    c) yellow 

 

176. A chain is checked for stiff links by

 #    a) running the chain over a finger by 180 degrees 

       b) hanging by hand by measure and sight 

       c) stretching out and measuring 

 

177. Medium carbon steels have a carbon content of 

#    a) 0.3 – 0.5 % 

      b) 0.5 – 0.8 % 

      c) 0.8- 1.05 % 

 

178. Brinell hardness testing measures

      a) depth 

#    b) diameter 

      c) area 

 

179. In the tensile strength test

      a) the material is pulled to limit of elasticity 

#    b) the material is pulled to until it breaks 

      c) the material is pulled until it reaches its UTS 

 

180. Impact resistance measures the  

#    a) material toughness 

      b) material hardness 

      c) material ductility 

 

181. A ferrous metal contains 

#    a) iron 

      b) aluminium 

      c) magnesium 

 

182. What is Alumina?

      a) Aluminium ore 

#    b) A ceramic oxide of aluminium 

      c) An alloy of aluminium 

 

183. Non heat treatable materials

      a) by annealing 

#    b) can be hardened strain hardening or cold working 

      c) cannot be hardened 

 

184. In corrosion, the electrode that loses electrons is

      a) the cathode 

#    b) the anode 

      c) either the cathode or the anode depending upon the electrolyte 

 

185. Which of these core materials will be used in the making of a composite material flat panel

      a) rectangular core 

#    b) hexagonal core 

      c) flexible core 

 

186. Corrosion at the grain boundaries is called

      a) filiform 

#    b) intergrannular 

      c) fretting 

 

187. What does MSDS stand for? 

      a) Maximum Structural Design System 

#    b) Material Safety Data Sheet 

      c) Metal Surface Dimension Sector 

 

188. Which of these is a common coz for corrosion?

      a) Water in fuel 

#    b) Spilled battery acid 

      c) Untreated metal 

 

189. Most commonly used thread form in aviation is

      a) round thread 

      b) buttress 

#    c) V thread 

 

190. Pitch of a screw thread is defined as 

#    a) distance from the centre of one crest to the next 

      b) difference between major diameter and minor diameter 

      c) distance between the crest and the root of the thread 

 

191. A bolt with a raised dash is 

      a) An standard 

#    b) Corrosion Resistant Steel 

      c) close tolerance 

192. A rivet with no marking has the material code

#   a) A 

     b) AD 

     c) D 

 

193. A dowel will take what loads?

#    a) shear 

      b) tensile 

      c) torsion 

 

194. The advantage of circlips is

     a) cheap 

     b) can be used for both inner and external applications 

#   c) Both a and c 

 

195. Rivet MS 20426 has what head type?

     a) Round 

     b) Universal 

#   c) CSK 

 

196. Cable tension is maintained by

 #   a) a cable tension regulator 

      b) a grommet 

      c) a fair lead 

 

197. Which material are hydraulic fluid hoses made from 

     a) Butyl 

#   b) Teflon 

     c) Rubber 

 

198. What load are spring hooks subjected to?

     a) tension 

     b) compressive 

#   c) bending 

 

199. Where are needle roller bearings used

 #   a) where there are space restrictions 

      b) high speed operations 

      c) Where is fluid damped bearing used 

 

200. Loads on tapered roller bearings 

      a) radial only 

      b) thrust only 

#    c) radial and thrust 

 

201. A Hardy Spicer coupling has what type of bearings? 

     a) Plain bearings 

     b) Ball Bearings 

#   c) Needle bearings      

 

202. Which of the following metals is an aluminium silicon alloy used mainly for casting?

      a) Aldrey 

      b) Alclad 

#    c) Alpax 

 

203. To correctly tension cables it can help to

#   a) have control surface locks in to support weight and adjust  turnbuckles equally

    b) take up initial slack by additional pulleys

    c) use a cable run with turnbuckles at least every eight feet

 

204. Honeycomb for repair can be removed with

    a) a drill

    b) locally manufactured concave knife

#  c) a router

 

205. Aircraft skin is joggled to

    a) conform to the “Area rule”

#  b) provide smooth airflow at faying surfaces

    c) make a frame lighter but stronger

 

206. Dzuz Fasteners provide

    a) for easy hammering into position

    b) a close tolerance fit

#  c) quick release fasteners at inspection panels

 

207. The pot life of a cold cured resin

    a) increases with increase of temperature

    b) is not reliant upon temperature fluctuations

#  c) decreases with an increase in temperature

 

208. British turnbuckles are checked for safety by

#  a) attempting to pass a hardened pin probe through the inspection hole

    b) attempting to pass locking wire through the hole

    c) looking through the hole and checking for threads showing

 

209. A full list of decals would be found in

    a) ANOs

#  b) Maintenance Manual

     c) Aircraft log book

 

210. A Skydrol hydraulic seal would be made of

#  a) butyl rubber, ethelene propylene or Teflon Phosphate Ester based

    b) natural rubber vegetable based

    c) synthetic rubber mineral based

 

211. The British system of heat treatment codes is

    a) a series of numbers

#  b) a series if letters

    c) numbers and letters

 

212. What colour is used to identify a primary structure on a diagram or drawing?

     a) Yellow

     b) Green

#   c) Red

 

213. If you are unable to identify a structure classification as either primary or secondary what action should you take?

     a) Grade as secondary

#   b) Upgrade as primary

     c) Paint it red and stamp it as tertiary

 

214. What is meant by the term Pitch Ratio?

 #  a) The distance between two holes

     b) The distance between the hole and the edge of the material

     c) The area of contact between the two sheets of metal when joining by rivets

 

215. What is meant by the term Major Repair?

     a) Repairs which can be made without dismantling for access and do not require the use of specialist tools

     b) Repairs which can be made whilst the aircraft is enroute

#   c) Repairs which require the use of special jigs, supports or jury structure and some dismantling

 

216. The length of solid rivets is in graduations of

     a) 1/8 inch

     b) ¼ inch

#  c) 1/16 inch

 

217. What would be the diameter and length of a solid rivet if the following markings are given, AS 162-408?

    a) ½ inch dia, 1 inch length

    b) ¼ inch dia, ½ inch length

#  c) 1/8 inch dia, ½ inch length

 

218. What would the marking .5 indicate after the normal part number of a solid rivet?

#   a) Indicates close tolerance rivet

     b) The diameter of the rivet is half an inch

     c) The rivet length in graduations of 1/8 inch

 

219. What is the pressure range for the Avdel Riveter type F?

    a) 20 to 60 psi

#  b) 60 to 80 psi

    c) 40 to 60 psi

 

220. What is the length of the operation stroke of the Avdel Riveter type F?

    a) 7/8 inch

    b) 1 inch

#  c) ½ inch

 

221. With respect to ferrous metals which of the following is true?

    a) Iron is not any element of ferrous metals

#  b) Iron is a main element and all ferrous metal are magnetic

    c) Iron is a main element and ferrous metal are not magnetic

 

222. The annealing process on steel is required sometimes as it

    a) provides a corrosion resistant layer that prevents oxidation

#  b) relieves internal stress suffered after engineering processes

    c) allows the material a greater stress per unit area

 

223. The impact testing technique is used on a material to test for

      a) hardness

#    b) toughness

      c) shear strain

 

224. Cobalt steel tested on the Brinell test would have a BHN number between

      a) 100 to 175

      b) 300 to 400

#    c) 600 to 700

 

225. If a material is found to be in the tertiary phase of creep the following procedure should be implemented:

      a) The crack should be stop drill, condition monitoring should be     applied

#    b) The component should be replaced immediately

      c) The component should under go dye penetrant process and condition monitored

 

226.In a sheet metal store the following is marked on a sheet of aluminium alloy L162 (sheet 1). On a different sheet the marking L172 (sheet 2) is found, the following

is true:

#    a) Sheet one is more ductile than sheet 2

      b) Sheet two is of a thicker gauge than sheet 1

      c) Sheet one has a shinier surface than sheet 2

 

227. Thermosetting adhesive, during their curing cycle give off

      a) static radiation

#    b) heat

      c) carbon monoxide

 

228. The effect of a lower temperature than ambient during the curing period of a resin, will cause the curing time to

#    a) increase

      b) decrease

      c) remain unchanged

 

229. Fretting corrosion occurs where

      a) pitting corrosion is allowed to become more pronounced

      b) a deep scratch increases to become fretting corrosion

#    c) two material are subject to very slight movement between the two

 

230. The initials U.N.C when related to aircraft bolts stands for

      a) United National Countersunk

      b) Unified National Centred

#    c) Unified National Coarse

 

231. Capped nuts are used so

      a) the part is not over torqued as the bolt touches the captive part first

#    b) to ensure that it is dry bolted

      c) to prevent leaks from pipe ends

 

232. On a rear insert plug the tool is used to

      a) insert the pins from the front and extracted from the rear

#    b) insert the pins from the rear and extract from the rear

      c) insert the pins from the rear and extract from the front

 

233. Wirelocking must be

      a) less than 45o to the axis

      b) less than 30o to the axis

#    c) more than 45o to the axis

 

234. If a sheet of aluminium alloy of 0.032 and 0.064 is to be joined together the rivet should be

       a) 0.064 plus 1D

#    b) 0.096 plus 1.5 D

      c) 0.032 plus 2D

 

235. A self aligning bearing is a

      a) angular bearing

#    b) radial bearing

      c) precision bearing

 

236. A crankshaft would be fitted with a

#    a) spherical roller bearing

      b) taper roller bearing

      c) cylindrical roller bearing

 

237. Where heat is likely to be transmitted through a bearing

      a) group 2 bearings are used

      b) group 3 bearings are used

#    c) group 4 bearings are used

 

238. Shielded ball bearings are inspected by

      a) running at operating speed and listening for signs of wear

      b) dismantling and inspecting

#    c) rotating slowly by hand

 

239. Thrust bearings take

#    a) sideloads

      b) journal loads

      c) radial loads

 

240. How would you check the setting of an adjustable reamer

#    a) ring guage

      b) DTI and V blocks

      c) external callipers

 

241. What is stress corrosion?

#    a) Corrosion in an area under continuous loading

      b) Corrosion in an area under cyclic loading

      c) Corrosion due to fretting

 

242. What is used as the base covering on a honeycomb repair?

#    a) Glass cloth or thin aluminium sheet

      b) Plywood

      c) Thick aluminium sheet

 

243. What is used for marking out steels?

      a) Engineers blue

      b) Wax crayon

#    c) Copper sulphate

 

244. What is used to remove corrosion from magnesium?

#    a) Chromic acid solution

      b) Phosphate acid solution

      c) Sulphuric acid solution

 

245. Where would a pop rivet with a break stem mandrel be used?

#    a) In a closed structure

      b) Where the head can be retrieved

      c) Any situation calling for a pop rivet

 

246. A press fit requires

      a) the hole to be expanded by heat

#    b) some sort of driving force

      c) the shaft to be shrunk by cooling

 

247. A chobert rivet gun may be used

      a) once only

      b) indefinately

#    c) until the end has worn 0.002 inch below nominal diameter

 

248. Avdel rivets are closed by

      a) squeezing

#    b) broaching

      c) a tapered mandrel

 

249. Surface corrosion on stainless steel is identified by

      a) white film

#    b) black pitting

      c) red rust

 

250. Hooks, wires and other suspension devices used in an anodic bath should be made of

      a) steel or copper

#    b) aluminium or titanium

      c) brass or copper

 

251. Phosphating of steels is carried out by immersing the steel in to a solution of

#    a) phosphoric acid and metal phosphates

      b) metal phosphates and sulphuric acid

      c) nitric acid and sulphur

 

252. Electro chemical reaction is caused by the contact of

#    a) dissimilar metals

      b) moisture on the surface of the metal

      c) bonding

 

253. When drilling a carbon fibre reinforced plastic use

#    a) a tungsten drill

      b) a steel drill and carbide powder

      c) a drill with a pointed tip

 

254. Hydraulic pipes are made from

       a) 1100 or 2020 H14

#     b) annealed steel

       c) 5056 or 7075

 

255. When laying up a glass fibre repair, the extra layer of fibre is

      a) a sacrificial layer for sanding

#    b) for extra strength

      c) for shrinkage

 

256. Nickel coated cables temperature range is

      a) 100 to 150oC

      b) 150 to 200oC

#    c) 200 to 250oC

 

257. Tempering entails  

      a) heating over the UCP and fast cooling

      b) heating over the UCP and slow cooling

#    c) heating under the UCP and slow cooling

 

258. A non metallic locknut is

      a) never torqued

#    b) never used over 250oF

      c) never re-used

 

259. Aluminium wiring when flexed will

#    a) work harden and embrittle

      b) have no effect

      c) have a higher resistance

 

260. Which can be re-used?

#    a) Locking plate, circlip, spring washer

      b) Tab washer, circlip, locking plate

      c) Shake proof washer, spring washer, locking plate

 

261. A bolt part number AN25C15 when compared to a bolt part number AN25-15 has

      a) a less expensive design and product costs

#    b) a higher resistance to corrosion

      c) a higher pitch thread

 

262. Countersunk rivets have two angles of countersink, these are

      a) 125 – 135 degrees

      b) 100 -160 degrees

#    c) 100 – 115 degrees

 

263. On a CHERRY MAX rivet, after the riveting process the mandrel section or stem is

      a) discarded

#    b) remains in the rivet sleeve to provide mechanical strength

      c) is ground down flush to rivet head

 

264. A single row ball bearing is best suited to accepting

      a) axial and radial Loads

#    b) radial loads only

      c) axial loads only

 

265. During a inspection interval one segment of a long chain is found to be defective, the solution to this is to

      a) replace the particular segment and run components to check for Serviceability

      b) replace 3 segment either side of the deficiency

#    c) replace the whole chain

 

266. When fitting a replacement hacksaw blade, the new blade’s teeth should face

    a) towards the user

#  b) away from the user

    c) either direction, not dependent on safety or efficiency of saw

 

267. Cold working of a material is used to reduce

#    a) wear of manufacturing tools

      b) fatigue

      c) material hardness

 

268. An S-N curve is useful in the design evaluation process for testing

      a) shear force

#    b) fatigue life

      c) tension

 

269. A ‘HUCK’ rivet is similar in design to a

      a) blind rivet

      b) dome head rivet

#    c) cherry rivet

 

270. A tab washer has been removed after fitment for a short time from a non essential system, the tab washer may be

      a) re-used

#    b) not re-used

      c) re-used if a spare is not available

 

271. On a structural repair, what type of rivet would you use when the back side cannot be accessed?

      a) Hi-loc rivet

#    b) Blind rivet

      c) Pop rivet

 

272. What are the signs of fretting corrosion on steel?

      a) Rust on surface

#    b) Dark staining around area

      c) Surface cracking as corrosion breaks through to surface of component

 

273. Taper pins are subject to what loads?

      a) Tensile

      b) Compressive

#    c) Shear

 

274. Bending of stretched honeycomb is

      a) with the web

#   b) across the web

     c) either way

 

275. A foot operated hydraulic swaging tools is checked for fluid level

       a) vertically

#     b) horizontally

       c) only when operating pressure is reached

 

276. On a hydraulic swaging tool, the swage is formed when

      a) swage pressure is reached on the gauge

      b) the bypass valve closes and ram is neutrally loaded

#    c) the bypass valve opens and ram is neutrally loaded

 

277. Bubbles are removed from a wet composite lay-up by

      a) application of pressure

      b) application of vacuum

#    c) use of a roller

 

278. Interference in ribbon cables can be prevented by

#    a) grounding alternate wires so that signal wires are never adjacent

      b) the use of a common earth return between signal wires in the cable

      c) using alternate return wires so that the cable differences cancel each other out

 

279. H.T. leads are made up of

      a) multi-strand, multi-core, screened

#    b) multi-strand, single-core, screened

      c) single-strand, single-core, screened

 

280. Use of excessive hardener in polyester resin leads to

      a) a less stiff joint

      b) stiffer joint

#    c) reduced pot life

 

281. The head marking on a close tolerance BSF bolt is

      a) a lowered ring under the hexagon

      b) a series of dots on the head face

#    c) a raised disk on the head face

 

282.In the drawing, what letter represents the nominal length of a BSF bolt?

      a) B

      b) C

#    c) A

 

283.In the drawing, both bolts are correctly wire locked when

#    a) both A and B are right hand threads

      b) both A and B are left hand threads

      c) A is a right hand thread and B is a left hand thread

 

284. Turnbuckles are correctly fitted when

#    a) the inspection hole is blind or the required number of threads are showing

      b) both rods are seen to touch in the inspection hole

      c) both rods enter the barrel by the same amount

 

285. Taper roller bearings are used for which of the following purposes?

#    a) To transmit thrust loads with radial loads

      b) To transmit radial loads whilst resisting axial movement

      c) To permit axial movement whilst resisting radial load

 

286. Sheet metal should be stored

#    a) on its edge in racks to prevent scratching

      b) stacked flat to prevent bending of sheets

      c) above 25 degrees centigrade

 

287. An aluminium alloy bolt may be identified by

 #    a) its colour (dyed green)

       b) the letter A stamped on the head

       c) its colour (dyed black)

 

288. A (British) 3/8″ dia UNF bolt will have the diameter code letter

      a) N

#    b) J

      c) G

 

289. The continuous coloured line on a hose assembly

#    a) will assist in detection of any twist in an installed hose

      b) identifies hose material

      c) identifies fluid compatibility of hose

 

290. Clad aluminium alloy (alclad) has a pure aluminium coating of

#    a) 5% of alloy thickness

      b) 1% of alloy thickness

      c) 0.002″ regardless of alloy thickness

 

291. The main metal in monel is

#    a) nickel

      b) stainless steel

      c) aluminium

 

292. Austenitic stainless steels are

      a) magnetic

#    b) non-magnetic

      c) hardened by heat treatment

 

293. A tube complying to BS T51 is

      a) tungum

#    b) high pressure seamless copper tube

      c) HTS tube

 

294. Adapter nipples are not required on

       a) pipe to pipe coupling

       b) pipe to internally coned adapter

 #    c) pipe to externally coned adapter

 

295. The storage life of a flexible hose can be up to but not exceeding

      a) 2 years

      b) 4 years

#    c) 5 years

 

296. The markings on a flexible hose must include the

      a) manufacturers name

#    b) date of manufacture

      c) internal bore size

 

297. The stationary race of a journal bearing is normally

#    a) an interference fit

      b) a push fit

      c) a spigoted fit

 

298. Inspection of bearings is normally carried out

#    a) in situ

      b) when dismantled

      c) when removed from an assembly

 

299. Damage to the shield of a bearing should result in

#    a) rejection of the bearing

      b) replacement of the shield

      c) no action

 

300. The formation of steel depends upon

      a) the formation of pearlite into austenite

      b) the presence of pearlite in the structure

#    c) the formation of austenite into pearlite

 

301. The teeth of a gear would normally be

      a) nitrided

#    b) case hardened

      c) tempered

 

302. Which of the following could best be manufactured from Perspex panel?

#    a) A passenger window

      b) A radome

      c) A cockpit windscreen

 

303. Titanium alloys

#    a) have a high strength to weight ratio

      b) are corrosion resistant but heavy

      c) are cheap to manufacture

 

304. Why is nickel chromium used in many exhaust systems?

 #    a) Corrosion resistant and low expansion coefficient

       b) Lightweight and flexible

       c) Corrosion resistant and high heat conductivity

 

305. Which part of the 2017-T36 aluminium alloy designation indicates the primary alloying agent used in its manufacture?

#     a) 2

       b) 20

       c) 17

 

306. Spilled mercury on aluminium

       a) increases susceptibility to hydrogen embrittlement

#     b) causes rapid and severe corrosion in prolonged contact

       c) may cause impaired corrosion resistance if left in prolonged contact

 

307. Non-reversible chains can

       a) only be moved in one direction

       b) not be fitted through pressure bulkheads

#     c) only be fitted in one direction

 

308. When fitting a replacement flexible hose

#     a) ensure adequate clearance between the hose and the aircraft structure

       b) use the old one to apply the ‘set’

       c) always pressure test before fitting

 

309. How is residual magnetism removed?

#    a) Degaussing

      b) EMC

      c) EMI

 

310. The hardness of steel depends upon

      a) the iron austenite grain structure

      b) formation of pearlite into austenite

#    c) formation of cementite

 

311. When the temperature increases on a hot bond repair is paused is is known as

       a) ramping up

       b) ramping down

#     c) arrest point

 

312. What material is suitable for riveting steel?

#     a) Monel

       b) Copper

       c) Aluminium alloy

 

313. Cadmium plated rivets should not be used where the temperature may exceed

      a) 120oC

#    b) 250oC

      c) 200oC

 

314. High Tension leads are

      a) multi-core, screened

      b) solid-core, screened

#    c) multi-strand, single core, screened

 

315. The difference between annealing and normalizing is

#    a) both are heated above the UCT, cool slowly to anneal, cool in air to normalize

      b) both are heated below the UCT, cool in air to anneal, cool slowly to normalize

       c) both are heated above the UCT, cool in air to anneal, cool slowly to normalize

 

316. What rivets should be used with nickel alloy steel?

#    a) Monel

      b) Mild Steel

      c) Aluminium Alloy

 

317. Kevlar and Nomex are types of

      a) aluminium alloy

#    b) advanced composite

      c) glass fibre composite

 

318. How is the diameter of a cable measured?

#    a) Overall diameter

      b) Diameter of one wire multiplied by the number of wires

      c) Diameter of one wire only

 

319. MIL-H-5606 hydraulic fluid O-rings are identified with a

#    a) blue dot

      b) yellow and white dot

      c) yellow dot

 

320. The large diameter on a bevel gear is called the

#    a) heel

      b) toe

      c) foot

 

321. Chemical attack is a direct result of

      a) inter-granular corrosion

#    b) cathodic & anodic changes in the material

      c) filiform corrosion

 

322. A watermark on a bearing indicates

      a) bearing running dry

      b) lack of lubrication

#    c) intergranular corrosion

 

323. What is a fusible material?

      a) The ability of two dissimilar metals to melt together

#    b) The ability of a metal to melt

      c) The ability of a metal to be welded

 

324. 9 x 16 cable is

 #    a) 9 cables of 16 strands

       b) 9 cables having 16 turns per inch

       c) cable size 9/16 inch diameter

 

325. Turn buckle lock nut is a

#    a) stiff nut

      b) slotted nut

      c) castle nut

 

326. An AN steel bolt is identified by

#    a) X on head

      b) – on head

      c) plain bolt

 

327. Normalizing of steel is done to

#    a) remove residual stress of the manufacturing process

      b) make steel softer

      c) restore the fatigue life of steel

 

328. Needle bearings resist

      a) radial and axial load

#    b) radial load only

      c) axial load only

 

329. Turnbuckles are used to

#     a) adjust minor tension on the cable

       b) join the two ends of the cable

       c) adjust major tension on the cable

 

330. Rivnuts were originally used for

#     a) securing rubber deicing boots

       b) securing structural parts

       c) securing cabin floorings

 

331. The drill bit to be used for stainless steel should have included angle of

         a) 90 degrees

#       b) 140 degrees

         c) 118 degrees

 

332. Brittleness is

        a) the property to get deform before cracking

        b) the property to resist wear

#      c) the property to resist deformation

 

333. The angle of a screw thread is

#     a) the inclusive angle of the thread sides

       b) half the inclusive angle of the thread sides

       c) the distance the thread moves in one turn

 

334. A turnbuckle is in safety when

        a) the colour on the threads is showing

#    b) the witness hole is covered or the amount of threads showing at the cable end is in accordance with the Maintenance Manual 

        c) it is lockwired

 

335. A turnbuckle can be safetied by

       a) teflon lock nuts

       b) doesn’t require to be safety locked 

#    c) by lock nuts and safety wirelocking

 

336. What is an advantage of a double flare on aluminium tubing?

        a) It is less resistant to the shearing effect of torque

#      b) It is more resistant to the shearing effect of torque

        c) Ease of construction

 

337. What type loads cause the most rivet failures?

#     a) Head

       b)Shear

       c) Bearing

 

338. Which part of the 2017-T36 aluminium alloy designation indicates the primary alloying agent used in its manufacture?

        a) 17

#      b) 2

        c) 20

 

339.  Clad aluminium alloys are used in aircraft because they

       a) can be heat treated much easier than the other forms of        aluminium

       b) are stronger than unclad aluminium alloys

#     c) are less subject to corrosion than uncoated aluminium alloys

 

340. Non heat treatable aluminium alloys

       a) cannot be softened

       b) cannot be hardened

 #    c) can be hardened by strain hardening

 

341.Galvanic corrosion is caused by

#    a) the joining of 2 dissimilar metals

      b) cyclic stressing and a decrease in cross sectional area

      c) incorrect heat treatments or incorrect alloying

 

342. In the galvanic series, the most noble metal will, if joined to another metal

      a) corrode before the less noble metal

#    b) allow the less noble metal to corrode first

      c) always be at the top of the table

 

343. Stress corrosion is associated with

      a) cyclic loading and a corrosion pit

      b) a corrosion pit in a member under a compressive load

#    c) a corrosion pit in a member under stress

 

344. Intercrystalline corrosion

      a) always appears as small surface cracks

#    b) is detectable by X-rays

      c) is the same as exfoliation corrosion

 

345. The usual manufacturers anti-corrosion process to be applied to   Fe aircraft parts is

       a) anodising

#     b) cadmium plating

       c) metal spraying

 

246. Chromate treatment is applied to

#     a) magnesium alloys

       b) Al alloys

       c) Fe alloys

 

347. A spring washer

        a) must not be used more than once

        b) may be used a second time provided it is fitted the reverse way   round

#      c) maybe used more than once provided it continues to provide an efficient lock

 

348. If the cross sectional area of a cable is increased, what will happen to the voltage drop?

       a) Increase

#     b) Decrease

       c) Stay the same

 

349. Spring locking clips for turnbuckles can be used on

       a) all flying control cables

#     b) no flying control cables

       c) only on trim control cables

 

350. The cross sectional area of a copper crimp barrel is

       a) same as an aluminium one

       b) larger than an aluminium one

#     c) smaller than an aluminium one

 

351. What is the small hole on a swaged turnbuckle for?

#     a) To check if correct amount of cable has been inserted before swaging

       b) To check for moisture deposits

       c) To alloy the turnbuckle to be wire locked

 

352. Electrical cable on aircraft is mainly made from copper because

#     a) it offers low resistance to current flow

       b) it more malleable

       c) it does not oxidise

 

353. Fork end fittings on control rod ends should have

#     a) bolt heads fitted upwards

       b) 0.002 inch axial movement

       c) anti vibration compound

 

354. Rivets main strength quality is to resist

       a) tensile loads

       b) torsion

#     c) shear loads

 

355. Non heat treatable aluminium alloys

       a) can not be softened

       b) cannot be hardened

#     c) can be hardened by strain hardening

 

356. Advantages of electric arc steel making are

 #    a) no gas fumes or impurities are produced

       b) cheaper steel is produced

       c) no impurities exist in finished steel

 

357. Solution treatment after manufacturers have performed it out once can be carried out a further

        a) 1 time

#      b) 2 times

        c) 3 times

 

358. Following solution treatment aluminium alloy can be placed into service

       a) straight away

       b) after 24 hours

 #    c) after 5 days

 

359. The time between removal from heat treatment furnace and quenching must be not more than

       a) 3 seconds

       b) 7 seconds

#     c) 10 seconds

 

360. Specified time of contact between the indentor and test piece in a vickers or brinell hardness test is

        a) 10 seconds

#      b) 15 seconds

        c) 20 seconds

 

361. In an Izod impact test the striking energy of the striker is approx

        a) 150J

#      b) 163J

        c) 300J

 

362. When buffing surface of Aluminium Alloy, what material are you removing

       a) aluminium

       b) alloy

#     c) oxidised layer

 

363. When crimping, what chapter in the ATA system should you refer to?

#     a) 20

       b) 24

       c) 12

 

364. When checking the safety of turnbuckles you should use what?

#     a) Wire the same diameter as the inspection hole

       b) Wire smaller than inspection hole

       c) Visual check

 

365. Anti-corrosive treatment used on Magnesium is

#     a) chromating

       b) phosphating

       c) electro-plating

 

366. Fretting corrosion occurs with

#     a) vibration in bolted parts

       b) water trapped between moving parts

       c) improper heat treatment

 

367. Intergranular corrosion is also known as what?

#     a) Exfoliation

       b) Galvanic

       c) Stress corrosion

 

368. When normalising, the material is?

       a) Quenched immediately

#     b) Left to cool in room temperature

       c) Cooled slowly

 

369. Why is clad alloy preferred to pure Aluminium?

#     a) Tougher

       b) Less brittle

       c) More ductile

 

 370. Why are aluminium alloys used on aircraft?

       a) Lighter

#     b) Stronger

       c) Corrosion resistant

 

371. An internal circlip can be used to

       a) retain a ball bearing on a shaft

#     b) retain a ball bearing in a housing

       c) to do both of the above

 

372. The colour coding of metals indicates

#     a) specification only

       b) specification and gauge

       c) quality standard

 

373. Silver solder is made from

#     a) zinc, copper, silver

       b) zinc, copper, tin

       c) zinc, copper, lead

 

374. How do you check a chain for elongation?

#     a) Lay flat on a table, apply tensile load and measure

       b) Hang chain up, check sight line and measure

       c) Adjust the end fittings

 

375. Drive planes on an epicyclic gear are

       a) at right angles to the plane

#     b) around a common axis of the plane

       c) at different angles to the plane

 

376. What type of material would hydraulic pipes on an undercarriage leg or bay be made from?

#     a) Stainless steel, annealed, 14H

       b) 1100, 2024, in half hard state

       c) 7075, H14

 

377. Music steel wire is

       a) used for high strength springs and as progressive-rate springs

#     b) used for lower strength springs

       c) made of high carbon or nickel alloy

 

378. The magnesium alloys used in aircraft can be recognized by

#     a) yellowish surface due to protective treatment

       b) shiny surface due to chromium plated on the surface

       c) silver surface due to protective coating

 

379.  Compared with the spur gears, spiral gears have

       a) more wear resistance

#     b) less stress concentration on gears

       c) have mechanical advantages

 

380. The crutch which can overrun the driving member, are known as

       a) overload clutches

#     b) freewheel clutches

       c) no-slip clutches

 

381. Interconnect cables

#     a) employ thi nner insulation than airframe types

       b) are used for equipment wire in the unified system

       c) are the cable through the MEC to the engine

 

382.Slight waviness on a  fibre composite structure

#     a) may be tolerable if lightly loaded

       b) could be reinforce with additional plies over the weakened area

       c) may cause fatigue crack eventually

 

383. A washer having both twisted teeth and spring actions is

       a) AN935 split-ring lock washer

#     b) AN936 shake-proof lock washer

       c) AN970 large-area flat washer

 

384. The tang of thread insert

       a) must be removed

       b) is removed with a hammer and a punch

#     c) may left it in the insert after installation

 

385. The AN526 truss-head screw

       a) is a widely used recesses head machine screw

       b) provides a good clamping force

#     c) is a pan-head screw

 

386. The first step for the coaxial cable to attach to the end fitting is

#      a) the outer covering is cut back to expose the braided outer     conductors

       b) back-off the insulator and connect with conductor

       c) use a tooling hold between the assembly and cable

 

387. Strength of fibreglass is

#     a) along the fibre

       b) across the fibre

       c) either direction

 

388. Cable minimum breakage strain for British and American is measured by

       a) pounds for both

#     b) hundredweight for British, c.s.a. and pounds for American

       c) hundredweight for British, c.s.a. hundredweight for American

 

389. A metal pipe has a small indentation what are the limits?

#     a) No dent on a bend

       b) 10% of external diameter

       c) 5% internal diameter

 

390. during construction, sharp internal corners and inaccessible places should be avoided to reduce

       a) fretting corrosion

       b) filiform corrosion

#     c) crevice corrosion

 

391. To check the interior of tubular members for corrosion attack

        a) dye penetrant testing should be used

#      b) ultra sonic testing is necessary

        c) any form of test is acceptable

 

392. Exhaust systems are usually made from stainless steel which is susceptible to

        a) surface corrosion

 #     b) intergranular corrosion

        c) filiform corrosion

 

 393. Corrosion will spread more rapidly when metals are exposed to

#     a) high temperatures

       b) dry climates

       c) cold climates

 

394. Anodising is a form of

#     a) artificial protection

       b) sacrificial protection

       c) metallic coating

 

395. Age hardening of aluminium is

       a) never carried out

       b) not necessary

#     c) a gradual hardening over a period of time

 

396. Alclad is

       a) aluminium with duralumin cladding

       b) duralumin with magnesium cladding

#     c) duralumin with aluminium coating

 

397. The oxide film on the surface of aluminium is

       a) porous

#     b) non porous

       c) hard and porous

 

398. Steel is tempered

#     a) after hardening

       b) before hardening

       c) to increase hardening

 

399. Cast iron is

#     a) heavy and brittle

       b) very malleable

       c) tough

 

400. Case hardening can be carried out on

       a) duralumin

       b) titanium

#     c) any ferrous metal

 

401. Normalising steels

       a) increases the hardness

#     b) relieves the stresses

       c) increases toughness

 

402. The Alocrom 1200 process was designed to treat

       a) surfaces too large for dip treatment

#     b) small surfaces

       c) chromium plating

 

 403. The maximum length of time a component is held in stores is known as the

       a) package life

#     b) shelf life

       c) storage life

 

404. When silica gel has absorbed moisture the colour changes to

#     a) pink

       b) white

       c) blue

 

405. A thrust bearing is designed so that

       a) it transmits axial loads, therefore limiting radial movement

#     b) it transmits axial loads, therefore limiting axial movement

       c) it transmits radial loads, therefore limiting axial movement

 

406. A thread insert may be removed by

 #    a) a blade removal tool

       b) a hammer and punch

       c) a pre-wind insertion tool

 

407. If a pulley shows signs of wear on one side

 #    a) the cable is misaligned

       b) the pulley is too large for the cable

       c) the cable is too tightly tensed

 

408. Cable end sleeves are made of

#     a) aluminium alloy

       b) copper

       c) stainless steel

 

409. A 7×7 cable has seven strands each of

       a) one wire

#     b) seven wires

       c) fourteen wires

 

410. A spring should be inspected for correct

       a) width, strength and squareness

#     b) length, strength and squareness

       c) width, length and strength

 

411. The process of forming a pure layer of aluminium over an aluminium alloy is

        a) electroplating

#      b) alclad

        c) metalizing

 

412.  A fire resistant cable must maintain adequate insulation in a fire for

        a) 30 minutes

#      b) 5 minutes

        c) 10 minutes

 

413. Cable stops are manufactured from

#     a) copper

       b) stainless steel

       c) magnesium alloy

 

414. Capped nuts are used

#     a) to stop leaks

       b) prevent overtightening due to the threaded portion being restricted by the cap

       c) to provide a dry torque joint

 

415. On a pre-preg composite

#     a) no life extension is allowed, it must be used immediately

       b) life can be extended by 12 months if stored below 10oC

       c) life can be extended by 12 months if stored above 40oC

 

416. Pulleys are manufactured from

#     a) brass and phenolic resin

       b) tungum and high tensile steel

       c) stainless steel and nylon

 

417. A pin in a fork end fitting is subjected to what loading?

       a) Torsion

#     b) Shear

       c) Tensile

 

418. The artificial production of a film of hydroxide on the surface of

aluminium or any of its alloys is commonly called

#     a) alodizing

       b) parco lubrizing

       c) anodizing

 

 419. Alodizing protects alloy metal from corrosion and does what else?

       a) Seals the surface from moisture

#     b) Makes a good surface for paint to adhere to

       c) Makes the surface alkaline

 

420. When silver coated connectors are used in unpressurised parts of the aircraft

#     a) red plague can occur

       b) wet track arcing can occur

       c) separation of the coating can occur

 

421. An aircraft pipe has a number stamped on it.  It is the

           a) fluid it is carrying

#         b) serial number

           c) aircraft system

 

422. A pipe with a 0.25″ inside diameter would be made from

#         a) 2024 alloy

           b) 5056 alloy

           c) steel

 

423. Hylocks

#         a) are pre lubricated

           b) do not require lubrication

           c) lubricate the screw part only

 

424. Hot bond composite pane has a crack. When it reaches the ribbon it will

#         a) stop

           b) carry on along the ribbon

           c) have no effect on its direction

 

425. When cleaning aircraft faying surfaces, a cause for concern is

           a) sharp corners etc trapping corrosive chemicals

#         b) corrosion acting on the end faces of panels

           c) leaks into the fuselage

 

426. Which is the following correct statement?

#         a) All corrosion is a chemical action

           b) Selenious acid is used for the re-protection of aluminium alloys

           c) The chemical test for bronze is nitric acid which produces a white precipitate

 

427. In a poorly produced repair to skin structure, where would stress corrosion start?

           a) Along the edges of repair

#         b) Radiate from the corner or sharp edges

           c) Form internally to produce surface corrosion

 

428. The form of corrosion most likely to cause stress concentration is

           a) Surface Corrosion

           b) Fretting Corrosion

#         c) Pitting Corrosion

 

429. Lead acid battery fluid has been found to be leaking on the surface of the aircraft structure. What  substance would you use to neutralise the acid?

           a) Sulphur and Lime

           b) Hot distilled water

#         c) Sodium bicarbonate of soda

 

430. What colour is the corrosion found on the surface of aluminium alloys?

           a) Green/Blue

#         b) White/Grey

           c) Black

 

431. Titanium can be identified by placing it on a grinding wheel and looking for

#         a) White Sparks

           b) Red Sparks

           c) Yellow Sparks

 

432. Adding more catalyst to a composite mix

#         a) Increases brittleness

           b) Decreases cure time

           c) Increases cure time

 

433. some metals are inherently stable. What does this suggest?

           a) They try to revert to their natural state

           b) They are highly prone to corrosion

#         c) They strongly resist corrosion

 

434. Re-treatment of aluminium alloys can be performed by

           a) Brushing on phosphate treatment followed by paint

           b) Selenious acid treatment

#         c) Alocrom treatment

 

435. Corrosion on copper is identified by

           a) red/brown rust

#         b) green discolouration

           c) black powder

 

436. A plate 10 inches by 5 inches is to be riveted with 3 rows of rivets.with the normal 4D rivet spacing and 2 D edge distance.  The rivets are AN460AD4-6. How many rivets are required?

           a) 56

#         b) 60

           c) 52

 

437. A composite flap panel has corrosion. What NDT method will you use to detect?

           a) High voltage x-ray

#         b) Low voltage x- ray

           c) Coin tap test

 

438. A composite flap panel has structural damage. What NDT  method will you use to detect?

           a) High volta x-ray

           b) Low voltage x-ray

#         c) Coin tap test

 

439. When metal is first heated slightly above its critical temperature and then cooled rapidly it is common that the metal will increase

           a) brittleness

           b) hardness

#         c) both of the above

 

440. The oxide film formed on the surface of aluminium is

           a) porous

#         b) non-porous

           c) hard and porous

 

441. Steel is tempered

#          a) after hardening

            b) before hardening

            c) to increase hardening

 

442. If a steel component is operated below the fatigue limit the fatigue life is

             a) finite

#           b) infinite

             c) depend on its proof stress

 

443. The critical process of heat treatment is

              a) method of heating only

              b) temperature and method of heating only

#            c) temperature, method of heating and cooling

 

444. What is generally true for titanium alloy?

            a) It is stronger than the steel

#          b) It is stronger than the aluminium

            c) It has lower density than magnesium

 

445.  Malleable material are

#          a) easy to forge

            b) highly ductile

            c) easy to cast

 

446. Sound is best absorbed by a material which is

            a) dense

            b) hard

#          c) soft and porous

 

447. If a material has to undergo deep cold forming operation. The essential property would be

            a) ductility

#          b) malleability

            c) elasticity

 

448. When examining a piece of metal through a magnifying glass hair line cracks would indicate

            a) crevice corrosion

#          b) intergrannular corrosion

            c) surface corrosion

 

449. Corrosion control begins at the

#          a) design stage

            b) manufacturing stage

            c) production stage

 

450. In the anodic film inspection and sealing test if a good seal has been accomplished

#        a) the dye mark will rub off

          b) the dye mark will not rub off

          c) the dye mark has no importance

 

451. After a product has been manufactured and all heat treatment has been carried out the stress remaining if any is termed as

           a) working stress

#         b) residual stress

           c) applied stress

 

452. Aluminium alloy parts are often protected by the

#         a) alochrom 1200 process

           b) alochrom plating

           c) chromium plating process

 

453. Corrosion is always completely removed

           a) to fit new parts

#         b) to permit the extent of damage to be assessed

           c) to prevent further damage

 

454. The metal which must not be heated in salt bath is

           a) duralumin

#         b) magnesium alloy

           c) rivets made of alclad

 

455. Lubrication of roller bearings and needle bearings are

            a) under pressure

#          b) by hand

            c) at low pressure via a tube

 

456. The colour code on sheet metal indicates

#          a) only the specification of the material

            b) the spec and gauge of the material

            c) that the material is from an approved source

 

457. The length of a straight hose assembly is measured

            a) along the coloured line

            b) between the outer faces of the union nuts

#          c) between the extremities of the two nipples

 

458. UNF means

#          a) unified fine

            b) united nations fine

            c) union national fine

 

459. Knuckling is a problem on earlier aircraft cables due to

            a) hot stamping of cables

            b) too much flux

#          c) wires being pulled through too hard

 

460.  A low carbon steel would normally be case hardened using:

 #      a)  pack or gas carburizing

          b) flame or induction hardening

         c)  the nitriding process

 

461. When two or more metallic materials are fused together, the

        combination is known as

#    a)  an alloy

      b)  a composite material

      c) a thermosetting compound

 

462. Annealing steels

  #   a) toughens the metal

      b) makes the metal brittle

      c) makes the metal malleable

 

463. Tempering of hardened steel is carried out to

        a) retain core hardness, but soften the surface

        b) retain surface hardness, but soften the core

#      c)  significantly reduce the brittleness without suffering a

            major drop in its strength

 

464. High speed steel relies heavily on the following metallic

        element for its ability to cut other metals, even when it is

        heated to a dull red colour

  #    a) Tungsten

        b) Vanadium

        c) Nickel

 

465.The proof stress of a material is the stress at which

       a) the material yields

       b) necking of the material begins

#     c) small amount of permanent set takes place

 

466. Malleable materials are normally

       a)  easy to cast

       b) also highly ductile

#     c) easily forged

 

467. When low carbon steel bolt is stretched beyond its elastic

         limit without breaking, it will

        a) become more ductile

         b) deform temporarily

#      c) deform permanently

 

468. 1% Nickel, 1% Carbon, steel is widely used for

        a) high tensile steel bolts

#      b) ball and roller bearings

        c)  exhaust valves

 

469. The Common bonding material for Tungsten Carbide is

#       a) Cobalt

         b) Invar

         c) Silicon

 

 470. In an autoclave the air is removed by

          a)    pressure

 #       b)    vacuum

          c)    roller

 

471. Grain size will effect the mechanical properties of metal.                                                                                                         .        Which of the following is true?                                                                

#     a)  Large grain size is attributed to slow cooling rates and

           will give less tensile strength                                                                                                             

       b) Small grain size is normally attributed to rapid cooling rates and                         .          will give less tensile strength                                                                                                                                                                                                                                                                                                                       

       c)  Materials with large grain size are more prone to creep

                                                                                           

 472.  Cable current ratings are based on a conductor temperature                                                                                  

          rise of 40 degrees Celsius and if the maximum design ambient                    .         temperature is continuously exceeded they should be

 #     a)  multiplied by the ‘K’ factor.

        b) divide by the ‘K’ factor                                                        

        c) halved

 

473. Which of the following types of electrical wire is likely to be                               .        used for connection of thermo- couples around the jet-pipe of                        .       a turbine engine?

         a) Nyvin

         b) Tersil

#       c) Fepsil

 

474. In a Teleflex flexible control system, the Teleflex cable consists of

          a) multi strand steel wires and is used primarily as a single

             one way device operated from a control lever

#        b) a high tensile steel wire with a right or left hand helix wire

            wound on to it. The system can operate in two directions

          c) a flexible seven or nineteen strand steel cable used for

              the operation of manual flying controls

 

475. A cable tension regulator will be installed in a flying control   

            system to

          a) compensate for rapid movement of the controls by 

             taking up the slack          

#        b) allow for variations in temperature which will vary the

             cable tension

          c) automatically compensate for low cable tension caused 

              by worn cables

    

476. A clevis bolt in a control cable fork end would be loaded in

          a) tension   

 #       b) shear

          c) both tension and shear

 

477. Aircraft flying control cables are normally classified by the

 #       a) minimum breaking load or the diameter in inches

          b) number of strands it contains and the number of wires in

             each strand

          c) circumference of the cable and overall length

 

478.  The cracking of structural members under repeated stress

          lower than the ultimate tensile load is known as

          a)  stress reversal

#       b) fatigue failure

         c) creep

 

479. Fatigue failure may be defined as

          a)  failure due to impact

          b) failure caused by stress in excess of the material U.T.S

#        c) reduction in strength due to alternating loads

 

480.  The Charpy test measures

#        a)  impact energy

          b) strain

          c) Young’s modulus

481. The main reason why crimped joints are preferable to 

            soldered joints is

         a) the quality of crimped joints will be constant

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         b) no flux is needed

#        c) there is no heat required

 

482. A piece of duralumin has been annealed and bent into shape prior    

         to fitting to an aircraft. Which of the following is correct? It must be

 #    a) solution treated prior to fitting to an aircraft

       b) fitted to the aircraft within 24 hours

       c) solution treated, precipitation treated and fitted to the

            aircraft within 2 hours

 

483. The maximum tensile strength of fibre reinforced plastic is

          achieved using

#      a)  unidirectional fibres

        b) chopped strand mat

        c) fibres uniformly distributed at 45 degrees to each other

 

484. A sheet of metal is designated 2024 -T4. The code tells us that

          the material is a copper based aluminium alloy

          a)  solution treated and artificially aged

 #       b) solution treated and naturally aged

          c) annealed and Naturally aged

 

485. A metal is coded 1285 using the IADS coding method. This

         means the metal is

         a) a copper based aluminium alloy i.e. duralumin

#        b)  99.85% pure aluminium

         c)  85% pure aluminium

 

486.  In the cable identification ‘2 P 215 A 28 N’ the position of the

          letter P indicates

         a)  which segment the cable is in

         b) that it is a Pneumatics system cable

#       c)  the circuit function

 

487. A material containing approximately 66% nickel and 33%

           copper is known as

#         a) Monel metal

           b) Nimonic

           c) Invar

 

488. Crimping terminals are colour coded. The colour indicates

#        a) the type of crimping tool to be used only

          b) the wire size to be used with that crimp only

          c)  both the crimping tool and the size of the wire to be used

 

489. Monel metal consists of approximately

          a) 66% Copper and 33% Nickel

#        b) 63% Nickel and 33% Copper

          c)  66% Chromium and 33% Copper

 

490. Silver solder is composed of the materials

#        a) Copper, Zinc and Silver

          b) Copper, Tin and Silver

          c) Zinc, Lead and Silver

 

491. Age hardening of aluminium is

         a)  never carried out

         b) not necessary                                                                  

#       c) gradual hardening over a period of time

 

492. What is the separation of an aramid panel layers described                            

#       a) delamination                                                                    

         b) debonding deta

         c) detachment

 

493.  What type of load is taken by an ” I ” beam

#       a) shear        

         b) tension  bend

         c) bending

 

494. Corrosion on a copper alloy can be recognised by

         a) white deposit                                                                   

         b) grey deposit

#       c) blue / green deposit

 

495. Silica gel is used for moisture control during storage, when

        serviceable it is coloured

          a) pink

          b) white

#        c) blue

496. Corrosion is always completely removed

          a) to fit new parts

#        b) to permit the extent of the damage to be assessed

          c) to prevent further damage

 

497. Normalising steels

       a) increases the hardness

#     b) relieves the stresses

       c) increases toughness

 

498. Cast iron is

#     a)  heavy and brittle

       b) very malleable

       c) tough

 

499.  Steel is tempered

#    a)  after hardening

      b) before hardening

      c) to increase hardening

 

500.  Aluminium is

#    a) highly resistant to corrosion

      b) not resistant to corrosion

      c) reasonably resistant to corrosion

 

501. The ease with which a material can be forged, rolled and

          St extruded without fracture is an indication of a material’s                                                                                    

        a) brittleness

        b) ductility

#      c) malleability                                                                                                                         

 

502. Austenitic steel is produced when the material is heated to

       a) below the Upper Critical Point 

#     b) above the Upper Critical Point                                                                                                                                                                                                                                                                                                                       

       c) above the Lower Critical Point

                                                                                                                              503. Steel is produced by refining pig iron where air/oxygen is blown

          to through the molten material remove

          a) sulphur        

          b) oxides

#        c ) carbon

 

504. The ‘Fatigue limit’ for steel is generally in the region of,                                                                                                                                                                                                           

          compared to the static U.T.S                                                                                                                                                                                                                    

#        a)  20% – 40%                                                     

          b) 40%   -60%

          c)  60%   -80%

 

505. Young’s Modulus is a measure of

         a) stress

         b) strain

#       c) stiffness

                         

506.  The ability of mild steel to accept more load after the yield

           point is reached is due to

          a) necking

#        b) strain hardening

          c) plasticisation

 

507. Hooke’s law states that, within the elastic region, elastic

         strain is

          a) indirectly proportional to stress

 #       b) directly proportional to stress

          c) directly opposite to stress

 

508.  The S.I. unit for strain is

         a) Nmm

         b) P.S.I.

#       c) no units

 

509. The value of stress for a given material can be derived by

          a) Load x Cross sectional area

#        b) Load / Cross sectional area

          c) Cross sectional area / Load

 

510. A material’s yield strength is the ability to

#        a) resist deformation

          b) resist side loads

          c)  withstand a crushing force

 

511.  What is fatigue?

         a) Constant stressing of a part

#       b) Cyclic stressing of a part

         c)  Failure of a component due to corrosion

 

512. The defects not allowed at all on wooden structures are

#        a) checks , shakes and splits

          b) pitch pockets

          c) mineral streaks

 

513.  The basic structure of an aircraft made of wood can be

        a) non – monocoque

        b) monocoque

#      c)  non – monocoque, monocoque, semi-monocoque

 

514. Polyester resin and glass fibre cloth, becomes

#       a) GRP

         b) PTFE

         c) PVC

515.  Fabrics may be fitted to airframe structures by

          a)  always riveting

#        b) tying on with string

          c)  wood nails

 

516. A gear system, or gear train, is made up of gears that are

#        a) driven and driver

          b) idler

          c) all of the above

 

517.  Split pins

        a) may be used more than once

#      b) may be used only once

        c) can be used more than once but depends on the material

             of the split pin

 

518. Why is stop drilling carried out at the end of a crack?

          a) to change the direction of the crack

          b) to increase the stress concentration at the crack end

#        c)  to stop the crack from propagating

 

519. A new rivet made of aluminium alloy is

            a) anodised with ‘s’

#          b) anodised with ‘x’

            c) anodised with ‘d’

 

520. A thermoplastic can be

          a) heated and formed only once

          b) is not affected by even low temperatures

#        c) can be reheated and reformed more than once

 

521. Tap testing a sandwich panel construction St

          a) will not give very reliable results

          b) is not an approved method of testing

#        c)  is crude, but works remarkably well

                                                                                                                                                                                                            522. An impact adhesive is part of the

         a) thermoset group

         b) Anaerobic resin group

#       c) thermoplastic group   

 

523. A butyl rubber seal is made from

        a) latex natural rubber

        b) silicon rubber

#      c) synthetic rubber

 

524. Which product is a serious health hazard when handling?

         a) Glass fibre

#       b) Asbestos

         c) Ceramic  

 

525.  Aircraft transparent plastics are cleaned using

          a)     paraffin and soft cotton pad

          b) clean dry soft leather

#        c)   warm soapy water, rinsed and dried

 

526. When galvanic corrosion takes place, which part corrodes?

          a) Anode

          b) Cathode

#        c) Oxide film coating

 

527. Which of the following is a temporary protective measure?

         a) Sacrificial protection

         b) Paint finish 

#       c) Chromating

 

528. Which anti-corrosion treatment is normally applied to

          aluminium alloys?

        a) Cadmium

        b) Pure aluminium

#      c) Anodising

 

529. A 14 SWG electrical cable when compared to a 18 SWG cable

          can carry

#      a) more current

        b) less current

        c) the same current

 

530. Co -axial cables are used

         a)  as they are able to handle high current

         b) as they produce an electrostatic field around them

              which prevents HIRF interference

#       c) as the fields due to current flow in the inner and outer

             cancel each other out

 

531.  7 x 7 cable has seven stranded wires each with

        a) 49 wires

#      b) 7 wires

        c)  14 wires

 

532. A thermosetting adhesive

         a)  can be re-formed when hot

#       b) undergoes a chemical transformation and creates an

              insoluble substance

         c) will be resistant to heat

 

533. Direct removal connector pins are fitted from the rear

#       a)  and removed from the rear

         b) and removed from the front

         c)  are fitted from the front but removed from the rear

 

534. Spilled mercury on aluminium causes

          a) yellowish stains on surface of the metal

 #       b) greyish powder, fuzzy deposit or whiskery growth

          c) black pits going into brown rust

 

535.  Capped nuts are used

         a) to provide dry bolting of the joints

#       b) to stop leaks due to metal caps fitted on the heads

         c) to lock the nut to the bolt

 

536. A spring should be inspected for correct

          a) width, length, strength

#        b) length, strength, squareness

          c) diameter, strength, squareness

 

537. Tension regulators on aeroplanes with fully metal bodies are

 #        a) set up the necessary tension

           b) maintain the necessary tension

           c) relax the tension in cold conditions

 

538. When hot stamping the cable number be sure it is not done

            too deep, otherwise

            a)  wet track arcing may occur

            b) may become not readable in the future

            c) may become susceptible to HIRF

 

539.  Why do hydraulic pipes have bends in them?

            a)  To fit airframe structure

            b) To allow for heat expansion and vibration

            c) Absorb vibration

 

540.   When should control cables be changed?

          a) When 20% wire diameter is worn

          b) When single wires are blended together

          c) The protective coating is displaced or missing

 

541. What does the 0 in 2024- T3 mean?

 #     a) The alloy has been modified

        b) The percentage of impurities in the alloy

        c) The alloy has not been modified

 

542. What type of heat treatment can be used on DD rivets?

          a) Annealing

 #       b) Solution Treatment

          c) Precipitation

 

543. What type of test involves using a weighted pendulum to

              strike a material until fracture?

#       a) Impact Resistance Test

         b) Fatigue Testing

         c) Hardness Test

 

  544. During a Rockwell Hardness test, what dimension is

            measured?

        a) The diameter of the indent

#      b) The depth of the indent

        c) The diameter and depth of the indent

 

545. What type of a test involves stretching material until it breaks ?

       a) Fatigue Testing                                                                                                                                                                                                                         

#     b) Tensile Testing                                                                                                               

       c) Hardness Testing

 

546. What is a Rockwell tester used for?                                                    

#    a) Hardness Testing       

      b) Fatigue Testing                                                                                 

      c) Tensile Testing