M6 Part 2

1. Fatigue strength of a material is determined by

Applying an alternating force to the material and determine the number of cycles required to produce fracture

Applying tension load

Compressing the material

2. The principle alloy of stainless steel is

Chromium

Vanadium

Molybdenum

3. Which one of the following materials is non-ferrous?

Cast iron

Tool Steel

Aluminium

4. The material most preferred for fair lead, hydraulic seal is

Rubber

Copper

Teflon

5. For a compression spring, the major strength consideration is the material’s

Compressive strength

Tensile strength

Shear strength

6. The term Al-Clad is used to designate a sheet of Aluminium alloy that has a coating of

Pure Aluminium

Copper

Zinc Chromate

7. Copper wire is tinned for protection against

Corrosion

Heat

Wear

8. A shake-proof washer has

Saw tooth serrations

Two or more tabs

Thin metal places

9. What type of bearing is used for landing gear wheel?

Roller bearing

Ball bearing

Tapered roller bearing

10. 7 x 19 cable is

Flexible cable

Extra-flexible cable

Performed cable

11. Which of the following compression spring will transfer the maximum load?

Ground end

Open end

Closed and Ground end

12. The class of fit used on most standard aircraft bolts is

Class 1

Class 3

Class 4

13. The locking feature used in the high temperature self-locking nut is achieved by

Distortion at the end of the nut

Insert plastic

Tab nut

14. When correct tension is obtained, the number of thread showing outside the turn barrel must not be more than

1 thread

1.5 threads

3 threads

15. In the turbojet engine, bearing oil seal is pressurized to

Keep the bearing cool

Make the seal more effective

Maintain sea level pressure in the bearing compartment

16. Corrosion caused by microbiological growth prone to occur in aircraft

Integral tank

Oil tank

Hydraulic tank

17. A combination of residual stresses and corrosive agent will cause

Filiform corrosion

Stress corrosion

Exfoliation corrosion

18. The advantage of gear reduction compared to direct drive in an aircraft engine is

Increase the propeller efficiency

Can use a larger engine on the same diameter propeller

Reduce the torque of the engine

19. Skydrol Hydraulic fluid will damage

Thermoplastic windshield

Butyl

Nylon

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

Same

High

Low