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The material generally used for aircraft components is

A. Mild steel

B. High speed steel

C. Stainless steel

D. Aluminium

Correct Answer : D.


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  1. When compared to the rod of the same diameter and material, a wire rope
  2. The spring mostly used in gramophones is
  3. The temperature at which the new grains are formed in the metal is known as
  4. A bolt is designed on the basis of __________ with a large factor of safety.
  5. When a nut is tightened by placing a washer below it, the bolt will be subjected to following type of…
  6. The velocity factor for ordinary cut gears operating at velocities upto 12.5 m/s is equal to
  7. If d is the normal diameter of a bolt in mm, then the initial tension in kg in a bolt used for making…
  8. The effective stress in wire ropes during normal working is equal to the stress due to
  9. The form factor of a helical gear __________ with the increase in the helix angle.
  10. According to Indian standards, total numbers of fundamental deviations are
  11. For maximum power, the velocity of the belt will be
  12. In order to permit the thermal expansion/contraction of tubing, it should be
  13. In nitrated parts, the origins of the fatigue cracks will occur at
  14. The dedendum circle diameter is equal to (where φ = Pressure angle)
  15. According to Indian standards, total numbers of tolerance grades are
  16. In levers, leverage is the ratio of
  17. The groove angle of pulleys for V-belt is
  18. In a gear, having Involute teeth, the normal to the Involute is a tangent to the
  19. A sliding bearing in which although lubricant is present, the working surfaces __________ contact each…
  20. Stress concentration is caused due to
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  22. A steel containing 0.8% carbon is known as
  23. When a belt drive is transmitting maximum power,
  24. The helix angle for single helical gears ranges from
  25. The speed of the sprocket reduces as the chain pitch __________ for a given number of teeth.
  26. Crowning on pulley helps
  27. The standard length of the shaft is
  28. The wire ropes make contact at
  29. According to Indian standard specifications, 100 H6/g5 means that
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