Module 6 B2 CAAS NOV 2010

1. Which of the following process is used to increase toughness of material?

a) Annealing b) Tempering* c) Normalizing

2. Which of the following process is to relieve internal stress?

a) Annealing b) Casting c) Normalizing*

3. Aircraft bolt is what class of fit?

a) 1 b) 3* c) 5

4. Pro-seal B1/2. The “1/2” means?

a) ½ hour application time* b) 50% sealant 50% accelerator. c) Shelf Life is ½ year from manufacturing life.

5. Which two types of corrosion requires changing of the component.

a) Pitting and fretting b) Intergranular and exfoliation* c) Surface and stress

6. A combination of residual stress and corrosive agents will cause

a) Filiform corrosion b) Stress corrosion* c) Exfoliation corrosion

7. Which material is most widely used in modern civil aircraft construction?

a) Stainless steel b) Titanium alloys c) Aluminum alloys*

8. Cables can be tensioned using

a) Bolts and nuts b) Turnbuckles* c) Locking wires

9. The process for protecting aluminum and aluminum alloys surface from corrosion is

a) Metal spraying b) Zinc plating c) Anodizing*

10. Landing gear wheels use what bearings?

a) Roller bearing b) Ball bearing c) Tapered roller bearing*

11. Which of the following is the most widely used cable in American manufactured aircraft?

a) 1 X 19 Flexible cable b) 7 X 7 Extra flexible cable c) 7 X 19 Extra flexible cable*

12. Tensile strength of a material is determined by

a) Divide the load to pull apart by its cross-sectional area* b) Multiply the load to pull apart by its cross-sectional area c) Divide the load to pull apart its cross-sectional area by bending it to 45 degrees

13. Inner and outer races are normally found on

a) Roller and ball bearing* b) Plain bearing c) Ball bearing

14. Which one of the following is mostly used for manufacturing engine parts?

a) Iron b) Copper c) Titanium*

15. Stainless steel contain

a) 18% Carbon and 8% Chromium b) 18% Titanium and 8% Vanadium c) 18% Chromium and 8% Nickel*

16. Which of the following steel alloys has the best high temperature characteristic?

a) Inconnel* b) Stainless steel c) Carbon steel

17. Electrical cables that are expose to the highest temperature on an aircraft are found in the

a) Wings b) Fuselage c) Engine*

18. The properties of Inconel most closely resemble which of the following steels

a) High carbon steel b) Stainless steel* c) Mild steel

19. Strength of internal wrench MS bolt compared to AN bolt is

a) Same b) Higher* c) Smaller

20. After re-heating, 2024 rivets should be driven within:

a) 1 – 2 Days b) 1 – 2 Hours c) 10 – 20 Minutes*

21. Yellow coloured composite cloth is likely to be made from?

a) Aramid Fibre* b) Boron Fibre c) Carbon Fibre

22. 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*

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

a) Fatigue Testing b) Tensile Testing* c) Hardness Testing

23. When hot stamping the cable number be sure it is not too deep, otherwise:

a) Wet arc tracking may occur* b) May become unreadable in the future c) May become susceptible to HIRF

24. Monel steel consists of approximate:

a) 33% Copper 66% Nickel* b) 33% Nickel 66% Copper c) 66% Chromium 33% Copper

25. One complete revolution at a single start thread will rotate the shaft:

a) Double to the pitch b) Equal to the pitch* c) Half the pitch

26. What type of bearings is use for aircraft wheels?

a) Taper roller bearings* b) Ball bearings c) Roller bearings

27. When installing new board into aircraft component, maintenance personal should refer to:

a) Board packaging material & maintenance manual* b) Bolt head & parts catalog c) *******

28. What type of stud threads are used to insert in light alloyed cast?

a) Fine* b) Multi start c) Coarse

29. Strength of Stainless Steel cable is compared to corrosion resistance steel:

a) Stronger* b) Same c) Weaker

30. NAS/MS heat treated Chamfered washer is used under what bolt?

a) Internal wrenching bolt* b) Close tolerance bolt c) Hex head bolt

31. When aluminum electrical cable is used to replace copper wire, it should be:

a) Two gauge larger b) Two gauge smaller* c) Same size

32. Self locking nut is locked by:

a) Friction* b) Torque c) Hand tighten

33. Major diameter 2.2, minor diameter 2.0. What is the depth of the thread?

a) 0.1* b) 0.3 c) 0.2

34. In a control system, a cable compensator is used for:

a) A change in outside temperature b) Fuselage flexing & wing loading* c) A change in pressure altitude

35. Heat treatment of a metal is for:

a) To acquire the required characteristic* b) To make metal softer c) To prevent corrosion

36. Bolt AN-xxDDxx, what is the material?

a) Aluminum alloy* b) Corrosion resistant steel c) Titanium

37. Cable fitting ground normally attached to?

a) Male connector b) End casing* c) Female connector

38. Self locking nut material?

a) Brass & nylon b) Nylon & steel c) Nickel and steel*

39. Identification of Shake proof washer:

a) Tooth serration* b) Two tabs or more c) Internal tab

40. Cable fittings wires are usually connected to connectors by:

a) Soldering and Crimping b) Crimping and Swaging* c) Crimping and Screwing

41. A bolt with the symbol X marked on its head is a

a) AN standard steel bolt* b) NAS close-tolerance bolt c) AN corrosion resistant steel bolt

42. During inspection a flat spot was found on a pulley, this indicated

a) A seized pulley* b) Excessive cable tension c) Misalignment of pulley

43. Improper adjustment of air pressure on a riveting gun may cause

a) Flattening of the upset head of the rivet if too low pressure is used b) Enlargement if the rivet hole if too high pressure is used c) Work hardening of the rivet if too low pressure is used*

44. A heavy criss-cross wear pattern around a complete pulley groove indicates

a) Seized pulley b) Internal cable tension c) Excessive cable tension*

45. Which one of the following reduction gear ratio will give the maximum RPM of the propeller?

a) 3:2* b) 16:7 c) 20:9

46. Which of the bearing will give you the largest contact surface area of a shaft with the same diameter?

a) Thrust bearing b) Roller bearing c) Plain bearing*

47. The grip length of a bolt is the

a) Length of the unthreaded portion of the bolt* b) Overall length of the bolt c) Length of the threaded portion of the bolt

48. The aerodynamic smoothness on a aircraft skin can be achieved by using

a) Universal head rivets b) Flat-head rivets c) Countersunk rivets*

49. In a turbojet engine, the bearing oil seal are pressurized to

a) Make the seal more effective* b) Keep the bearing cool c) Maintain sea level pressure in bearing compartments

50. The most commonly used rivets are:

a) Universal and countersunk rivets* b) Brazier and flat head rivets c) Round and universal rivets

51. Microbial growth is prone to occur in

a) Integral fuel tank* b) Oil tank c) Hydraulic tank

52. Magnesium is used in which part of the aircraft?

a) Casting b) Wheels* c) Firewall

53. A pulley system has an efficiency of 80% with a velocity ratio of 15, the force required to lift a load of 290kg is:

a) 24.2 kg* b) 34.8 kg c) 23.2 kg

54. A quick-disconnect coupling consists of:

a) A flared tube assembly b) A flareless tube assembly c) Two check valves*

55. In an all metal aircraft, if temperature increases what will happen to cable tension?

a) Increase b) Decrease* c) Same

56. A AN5-22 Bolt what is the diameter?

a) ½” b) 5/16” * c) 5/22”

57. Water in fuel tank will cause what corrosion?

a) Microbial Corrosion* b) Galvanic Corrosion c) Stress Corrosion

58. What type of corrosion occurs before pitting?

a) Uniform surface corrosion * b) Fretting corrosion c) Intergranular corrosion

59. What type of American screw is used on aircraft?

a) Machine screw, Structural screw & Self-tapping screw * b) Type A, B & C c) Philip, Reid & Prince screw

60. Polyester Resins are commonly used:

a) Structural b) Non-structural c) Structural & Non-structural*

61. Corrosion is a process where,

a) The element tends to revert back to its original state b) Oxidation of metal* c) ***********

62. Main advantage of a conical spring over a parallel spring is conical

a) Stronger, more fatigue strength b) Does not ‘coil bind’* c) Has better tension load

63. Chromium is added to steel for:

a) Corrosion resistant* b) Increase strength c) Increase weldability

64. Above 1500psi, the usage for aircraft hydraulic pipe is

a) Aluminum alloy b) Stainless steel* c) Pure aluminum

65. Which of the following device use LH as well as RH threads?

a) Turnbuckles* b) Flareless tube fittings c) Easy out

66. Clevis bolt is used for what load:

a) Tension load b) Shear load* c) Compression load

67. In construction of engine turbine disc, the material used is:

a) Inconnel* b) Stainless steel c) Titanium

68. What type of corrosion is unable to detect by visual inspection

a) Exfoliation Corrosion b) Fretting Corrosion c) Intergranular Corrosion*

69. A ‘pop’ type rivet is used for: a) Structural b) Non-structural* c) Both

70. Which is the lightest metal used in aircraft structure?

a) Aluminum* b) Titanium c) Magnesium

71. How do you identify a rivet material?

a) Head* b) End shank c) Both

72. How you form a blind rivet:

a) From rivet head only* b) From rivet tail only c) From rivet head or tail

73. How you secure a blind rivet:

a) By pulling a mandrel through the core* b) Using bucking bar and rivet gun c) Vice grip pliers and pneumatic gun

74. What type of code is used to identify the end of solderless tube?

a) SWG code* b) Colour code c) Wire size

75. What determines the increased of current in an electrical cable:

a) Length of wire b) Cross sectional area* c) Insulation of the cable

76. How to prevent interference in an electrical cable:

a) Bonding b) Co-axial cable* c) Insulation

77. Which type of fasteners requires box wrench and allen wrench to be tighten?

a) Hi shear rivet b) Hi-lok fastener* c) Jo Bolt

78. Advance stage of stress corrosion will lead to?

a) Crevices corrosion b) Intergranular corrosion* c) Filiform corrosion

79. When the cable is correctly tension, how many thread at end fitting is outside the turn barrel is exposed a) Zero b) Not more than 1.5 threads c) Not more than 3 threads* 80. Which screw have an internal hex head wrench fit:

a) Grub screw* b) Phillip screw c) Self tapping screw

81. On a particular turboprop aircraft, the propeller reduction gear ratio is 0.0944 to 1. If the propeller RPM is 900, the engine RPM is

a) 9534* b) 8887 c) 10113

82. Which area of the aircraft is most prone to corrosion?

a) Fuselage area below the galley and toilet* b) Cargo floor c) Wing leading edge

83. In which area, cables are most prone to corrosion?

a) Below galley and toilet* b) Cargo floor c) Wing leading edge

84. What is the fairlead used for?

a) To increased tension of cable b) To prevent the cable from touching the aircraft body* c) To prevent leakage of pressure

85. How do you detect delamination in a composite material?

a) Metallic ring test* b) X-ray c) Eddy current

86. Drilled head of an AN bolt is indicated in its code by the letter?

a) “H” before the dash number* b) “A” after the dash number c) “H” in front of the code number

87. 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

88. Why do hydraulic pipes have bends in them?

a) To fit airframe structure* b) To allow for heat expansion and vibration c) Absorb vibration

89. A right hand thread is: a) Rotated clockwise to advance it* b) Rotated anti-clockwise to advance it c) Never used in aircraft