Module 6 B2 September Session 2026

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Module 6 B2 Sep 2026

  1. 7 × 19 cable is:
    Answer: 7 strands, each containing 19 wires.
  2. K-Monel contains:
    Answer: Nickel, copper and aluminium.
  3. File test is for:
    Answer: Testing the hardness of a type of steel.
  4. Classes of fit (MTCS):
    (a) Class 1 – Free fit
    (b) Class 2 – Loose fit
    (c) Class 3 – Medium fit (marked in the notes)
  5. Harden by heat treatment:
    (a) 2117
    (b) 2024-T (marked in the notes)
    (c) 5053
  6. The mid-part of crest and root:
    Answer: Base of thread.
  7. Impact testing is for:
    Answer: To indicate the toughness of a material and its ability to resist mechanical shock.
  8. Most active metals which corrode easily:
    Answer: Aluminium and magnesium (as written: Al & Mg).
  9. Corrosion due to lack of uniformity:
    Answer: Intergranular corrosion.
  10. MTCS — intergranular corrosion:
    (a) Intergranular corrosion attacks along the grain.
    (b) As in (a), and it can lead to exfoliation corrosion.
    (c) As in (b), and inspection is done by eddy current and ultrasonic methods (marked in the notes).
  11. Corrosion occurs on the surface:
    (a) Chemically
    (b) Electrochemically
    (c) Either (a) or (b) (marked in the notes). 12. Factors determining selection of wire:
    Answer: Voltage drop and current-carrying capacity/density (wording in the notes is unclear).
  12. In bearings:
    (a) Radial load is perpendicular to the axis; axial load is parallel to the axis.
    (b) Radial load increases with increase in RPM.
    (c) Axial load is produced due to thrust.
    (d) All of the above (marked in the notes).
  13. AN and AC fittings (MTCS):
    (a) AN has a 35° angle and AC has 37°.
    (b) AN has … and AC has not … (handwriting unclear; marked in the notes).
    (c) AN colour is yellow and AC colour is blue.
  14. Bearing used in low-pressure application:
    (a) Roller bearing
    (b) Ball bearing (marked in the notes)
    (c) Either (a) or (b)
  15. General bolts are used in landing gear and longerons.
    Answer: No answer was clearly written.
  16. MTCS — screw/thread statements:
    The notes contain two crossed-out statements about screw and nut/thread strength; wording is not reliably
    legible.
  17. MTCS — wire gauge:
    (a) Larger the diameter, the smaller the wire-gauge number (marked in the notes).
    (b) Smaller the diameter, the smaller the wire-gauge number.
    (c) None.
  18. Which type of silicon-carbide composite has high tensile strength?
    (a) AN co-SiC
    (b) SiC (marked in the notes)
    (c) Si-Ti-SiC
  19. To avoid magnetic interference, which wire is used?
    (a) Shielded wire (marked in the notes)
    (b) Standard aircraft wire
    (c) None
  20. Thickness of cadmium plating depends on:
    Answer: Time and current density. 22. Rivet used in sealing application:
    Answer marked: Window/“windown” cherry-lock rivet (handwriting unclear).
  21. Taper pin is used where:
    (a) Tensile strength is required
    (b) Shear strength is required (marked in the notes).
  22. MTCS — simple gear train:
    (a) Two gears mounted on the same shaft.
    (b) Two gears mounted on separate shafts.
    (c) Two or more gears mounted on separate shafts (marked in the notes).
  23. MTCS — flangeless tube installation:
    (a) Final tightening commences at the point where the nut just begins to bottom.
    (b) Use a wrench and turn the nut 1/6 turn (marked in the notes).
    (c) Permissible to tighten the nut an additional 1/6 turn.
  24. Disadvantage of cable linkage:
    (a) Not flexible
    (b) Frequent adjustment of cable (marked in the notes)
    (c) High weight
  25. Define elasticity:
    No definition was written on the following page; the notes continue with a separate item.
  26. In AN816, aluminium bronze:
    Answer written: Cadmium-plated, natural appearance (the exact relation to the question is unclear).
  27. Titanium alloy:
    Answer: A-110 AT (as written).
  28. Question on worm gear:
    No answer was written.
  29. 4-28 thread indicates:
    Answer: 1/4-inch diameter has 28 threads in 1 inch.
  30. The size of electric wire is determined by:
    (a) Length of wire
    (b) Current carrying
    (c) Voltage drop
    (d) All of the above
  31. Sealing vacuum bag:
    Answer: Layup tape. 34. 1 circular mil =
    Answer written: 0.785 (unit/context not specified in the notes).
  32. Elastic stop nut:
    Answer written: 250°F.
  33. Pal nut:
    (a) Used in the same manner as a jam nut or a check nut, but it is lighter in weight (marked in the notes).
    (b) The alternative statement says it is heavier in weight.
  34. Question on smoking rivet:
    No answer was written.
  35. In plain bearing:
    Answer: Both radial and axial load.
  36. Question on honeycomb:
    No answer was written.
See also  Module 6 September Session 2026 | Materials and Hardware

Disclaimer: Memory-Based Content, The questions provided herein are compiled based on the memory recalls of candidates who appeared for the exam.

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