Module 6 September Session 2026 | Materials and Hardware

Module 6 Sep Session 2026 Questions

1. Continuous silicon carbide
   ✓ Avco CVP SiC
   ○ Nicalon SiC
   ○ Tyranno Si-Ti-C
2. Titanium alloy which takes primary structural load
   ○ A-70
   ○ A-55
   ✓ C-110M
   ○ A-110 AT
3. MTCS — Worm gear
   ○ Has low mechanical advantage
   ✓ Has high mechanical advantage
   ○ Gives input force to spur gear for spiral worm gear
4. Nut is held, bolt is turned
   ○ Clevis bolt
   ✓ T-bolt
   ○ Lock bolts
5. When two metals dip in an electrolyte, then the corrosion is on?
   ○ Cathodic
   ✓ Anodic
   ○ Both
6. Composition of K-Monel
   ○ Nickel, copper, manganese
   ○ Chromium, nickel, iron
   ✓ Aluminium, copper, nickel
7. MTCS — Pylon nut
   ✓ A pylon nut is a stamped sheet-metal nut used as a jam nut on a check nut, but it is lighter in
   weight
   ○ A pylon nut is a stamped sheet-metal nut used as a jam nut or a check nut, but it is heavier in
   weight
   ○ Pylon nut is not a registered trademark
8. Which rivet is kept in a refrigerator?
   ○ 2027-T
   ✓ 2024-T
   ○ 5053
9. Which one is correct in the case of the cotter-pin bolt safetying method?
   ○ The prong bent over the bolt end should extend beyond the bolt diameter
   ○ The prong bent down should rest against the surface of the washer
   ○ In the wrap-around method, the prongs should extend outward from the sides
   ✓ All prongs should be bent over at a reasonable radius
10. 4-28 thread specifies
    ✓ 1/4-inch diameter; has 28 threads in 1 inch of its threaded length
    ○ 1/4-inch length; has 28 threads in 1 inch of its thread length
11. Do not install elastic stop nuts in places where the temperature is
    ○ 200°F
    ○ 300°F
    ○ 350°F
    ✓ 250°F
12. MTCS — Classes of fit
    ○ Class 1 — close fit
    ○ Class 2 — loose fit
    ✓ Class 3 — medium fit
    ○ Class 4 — free fit
13. 7 × 19 cable means? (1 × 2)
    ✓ 7 wires of 19 strands each
    ○ 19 wires of 7 strands each
14. J-circular mils
    ○ 0.383
    ✓ 0.78
    ○ 0.66
15. Plain bearings take
    ○ Only radial loads
    ○ Only thrust loads
    ✓ Radial loads, although some have been designed to take thrust loads
16. Some questions related to the moulding process of fabric
    ○ Plastic bagging
    ✓ Vacuum bagging
17. Which tape is used in vacuum bagging?
    ✓ Zygup tape [handwriting unclear]
    ○ Surface tape
18. The removal of the surface of the material by mechanical forces like using
    sandpaper or abrasive particles
    ○ Corrosion
    ✓ Erosion
    ○ Cut Module 06 • September 2026 Page 3
19. The electrochemical deterioration of a metal because of its chemical reaction
    with the surrounding environment
    ○ Erosion
    ○ Cut
    ✓ Corrosion
20. Smoking rivet
    ✓ Filleting corrosion [wording unclear]
    ○ Surface corrosion
    ○ Filiform corrosion
21. Corrosion occurs by
    ○ Chemical attack
    ○ Electrochemical action
    ✓ Both
    ○ Either
22. In a simple gear train
    ○ At least two or more gears rotate on different shafts
    ○ As in (1), an even number of gears rotates in the same direction
    ○ As in (1), an odd number of gears rotates in the opposite direction
    ✓ As in (1), an even number of gears rotates in the opposite direction
23. AN 819 have
    ✓ Blue or black
    ○ Colourless
    ○ As in (ii) + cadmium plated
24. Impact testing
    ✓ Does not indicate the shock resistance of a material, but it will show whether the material is
    excessively brittle
    ○ It determines the strength of an aircraft tubing
25. Rivet used in self-sealing application?
    ✓ Bubbled cherry lock
    ○ Thin-down lock rivet [handwriting unclear]
26. Terminal lugs related question
    ✓ 7 to 14
    ○ Not more than 4
    ○ 10 to 15
27. Question related to honeycomb strength compared to composite laminations
    and Al

• No options written in the source

1. Cable linkage disadvantage
   ✓ Frequent adjustment required Module 06 • September 2026 Page 4
2. Corrosion due to lack of uniformity
   ○ Surface corrosion
   ○ Dissimilar corrosion
   ✓ Intergranular corrosion
3. Question related to pitch lead
   ✓ Tapered
   ○ Straight
4. To check the hardness
   ✓ File test
5. Selection of wire
   ○ Voltage drop
   ○ Current-carrying capacity
   ✓ Both
6. The midpoint of crest and root?
   ✓ Base of thread
   ○ Angle of thread
   ○ None
7. To avoid EMI around wire
   ✓ Shielded wire
   ○ Standard aircraft wire
   ○ Both
8. MTCS
   ○ When the direction of load is at a right angle, it is radial load; when parallel, it is axial load
   ○ Radial load changes due to RPM change
   ○ Axial load changes due to compression and turbine
   ✓ All

Give Module 6 Mock Test

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