1. Identification of the wires.
A) A wire 3 to 7 inch in length should be identified approximately at the centre
B) 7 inch in length not marked
C) Wires less than 3 inch should always be marked at both ends
2. Reciprocating use spring in the valve in conjugation of one spring in another.
A) Helical compression
B) Helical torsion
C) Torsion bar
3. Fuselage, turbine engine mount & landing gear made of.
A) Chromium
B) Nickel chromium
C) Chrome molybdenum
4. BARCOL TESTER.
A) Test the hardness of steel
B) Test the alloy copper, brass (relatively soft material), non-ferrous
C) Ferrous material
5. Hardness of steel tested by.
A) Hardness test
B) Spark test
C) File test – piece of material cut into with corner or head of file
6. To carry the same amount of current.
A) Aluminium wire 2 gauge larger than copper
B) Aluminium wire same gauge as copper
C) Aluminium wire 2 gauge smaller than copper
7. Lock plate should.
A) Positive retention of the nut
B) Prevent corrosion only
C) Reduce vibration only
8. Tooth that projects above or outside of pitch circle.
A) Dedendum
B) Addendum
C) Pitch diameter
9. Chrome-molybdenum steel composition.
A) 0.25–0.55% Carbon, 0.15–0.25% Molybdenum, 0.50–1.10% Chromium
B) High nickel content steel
C) Low carbon plain steel
10. Normalizing.
A) Apply to iron base alloy
B) Apply to aluminium alloy
C) Apply to magnesium alloy
11. Nickel steel.
A) SAE 2330
B) SAE 1045
C) SAE 1095
12. Castellated shear nut.
A) Clevis
B) For vibration
C) Take radial load
13. In 4 digit, 2nd digit indicate.
A) Alloy modification
B) Carbon percentage
C) Heat treatment
14. In die-casting, if weight is primary importance, which material used.
A) Magnesium
B) Aluminium
C) Zinc
15. Which fitting used where rotating disc connection not required.
A) Gyrofit fitting
B) Swaged fitting
C) Flared fitting
16. ARAMID fibre.
A) Four times greater strength than aluminium
B) Same strength as aluminium
C) Less strength than aluminium
17. Parkeron-2 type screw.
A) AN 530 & AN 531
B) AN 3 bolt
C) NAS screw
18. Where light drive fit is permissible.
A) General purpose bolt
B) Structural bolt
C) High tensile bolt
19. 2XXX series alloy.
A) Copper
B) Magnesium
C) Silicon
20. Lockwasher never used on.
A) With fasteners in primary / secondary structure, screw subject to frequent removal, where washer is subjected to air flow
B) Non-structural location
C) Temporary fastening
21. High tensile strength fibre.
A) Nextel 480
B) Glass fibre
C) Carbon black
22. Corrosion in accordance with SRM.
A) Damage repair by patching
B) Repair by insertion
C) Replace complete structure
23. Quick disconnect coupling.
A) Permit connection / disconnection without loss of fluid / entrance of air in system
B) Permanent connection
C) Used only for fuel tanks
24. Surface composite repaired by blind rivet and sheet patching.
A) Attachment is temporary
B) Use on structure repair
C) Repair as a workshop repair
25. Letter “A” in front of A21icates4 ind.
A) Add zinc to improve pouring quality
B) Add copper for strength
C) Add magnesium for hardness
26. MTCS.
A) Taper pin used to carry shear load.
B) Flat head pin use with rod terminal & secondary control.
C) Roll pin, tubular shape & slotted in the full length of tube.
D) All the above.
27. Form of corrosion which common in AC structure.
A) Surface corrosion and stress corrosion.
B) Filiform corrosion and intergranular.
C) Dissimilar and intergranular.
D) All.
28. In Ultrasonic Test.
A) Use HF wave.
B) Wave pass through composite and Al.
C) Record the time of returning by transducer.
29. This nut full load carrying section has thread strength of standard bolt, while locking bolt nut firmly in position.
A) Castle nut
B) Plain nut
C) Check nut
D) Boot self-locking nut.
30. Defect permit in wood.
A) Pin knot cluster, small clusters are acceptable as they produce only small effect on grain direction.
B) Large knot cluster
C) Cross grain
31. Barcol Tester.
A) The unit can be used in any position and in any space that will allow for the operator hand.
B) Used only in vertical position
C) Used only on steel
32. About electric wire AWG.
A) AWG wire diameter becomes small as gauge number becomes large.
B) AWG wire diameter becomes large as gauge number becomes large.
C) AWG is based on length of wire.
33. MTCS.
A) Roller bearing take radial load Insights
B) Ball bearing take radial and axial load
C) Roller bearing take more load as compared to all bearing.
34. Thermosetting resin – to cure.
A) Chemical reaction.
B) Heat only
C) Adhesive
35. About Rockwell Tester.
A) Hardness of curved surface with radius of 3/8 inch or greater can be obtained by the Rockwell tester.
B) 1/16 inch ball → load 100 kg → red colour scale.
C) 120° diamond cone shaped penetrator used for hard steel, 1/16 dia hard steel ball used for soft material.
36. NAS type bolt.
A) Hex head
B) Internal wrenching
C) Counter sunk
D) All.
37. Inspection of glue on A/C.
A) Remove paint with help of scraper.
B) Remove paint with help of proper solvents.
C) Kick break test.
38. Carbon Steel.
A) Magnetically strong or nitric acid test – the kick
B) Non-magnetic and rapid chemical action by nitric acid.
C) High chromium content steel.
39. Bonding jumper resistance.
A) 0.003 ohm Ω
B) 0.03 ohm
C) 0.3 ohm
40. MTCS.
A) Diametral pitch represents size of gear teeth.
B) At high DP means smaller tooth size
C) At high DP means larger tooth size
41. Filiform corrosion.
A) Humidity of air 78–90% and surface is slightly acidic.
B) Occurs only in dry condition
C) Found only on steel
42. A/C parts use.
A) Cadmium plating
B) Chromium plating
C) Zinc plating only
43. MTCS.
A) 2017-T & 2024-T alloy used in aluminium alloy structure where more strength is needed
B) Used where corrosion resistance only required
C) Used for casting only
44. Flexible hose use.
A) Connection between stationary part and movable part
B) Only stationary to stationary
C) Only movable to movable
45. Ideal gear.
A) Spur gear
B) Helical gear
C) Ideal gear (no losses)
46. Dzus rivet.
A) Stud, grommet and receptacle
B) Head and shank only
C) Blind type rivet
47. About icebox rivet.
A) After 2 week without use = discard
B) After 2 week without use = reheat
C) Rivet cannot reheat
48. Brazier head rivet.
A) Large diameter
B) Small diameter
C) Flush head
49. One more question from diametral pitch.
A) Diametral pitch is number of teeth per inch diameter
B) Diametral pitch does not depend on tooth size
C) Diametral pitch depends only on material.
50. Stainless steel spring.
A) Low creep at high temperature
B) High creep at high temperature
C) Used only at low temperature
51. Turnbuckle.
A) Used in the minor adjustment in cable length
B) Used only for major adjustment
C) Used only in rigid linkage
52. MTCS (Springs material).
A) Flat springs are made from high carbon steel.
B) Small unimportant coil springs are made from high carbon steel (1090) in sheet form.
C) Large coil springs like those used for engine valve spring and L/G are made from chrome vanadium steel (6140).
D) Both 6140 and 1090 are interchangeable.
53. 1100 Rivet
A) Riveting softer aluminum alloy
B) Riveting high strength steel
C) Used only for magnesium
54. Suitability of metal.
A) In A/C, electrical conductivity must also be considered in conjunction with bonding to eliminate radio interference
B) Only mechanical strength is important
C) Only corrosion resistance is important
55. About aluminium wire.
A) Aluminium wire should not be used where there is frequent disconnection
B) Use of aluminium wire is discouraged for run of less than 3 feet.
C) Aluminium wire is preferred for very short run
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