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The fatigue life of a part can be improved by

A. Electroplating

B. Polishing

C. Coating

D. Shot peening

Correct Answer : D.


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  2. When the bolt is very yielding as compared to the connected members, then the resultant load on the…
  3. Wahl's stress factor __________ very rapidly as the spring index decreases.
  4. The included angle between the sides of V-belt is
  5. Which one of the following loading is considered for the design of axles?
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  7. The backlash for spur gears depends upon
  8. In order to permit the thermal expansion/contraction of tubing, it should be
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  11. Oil in journal bearing should be applied at the point where load is
  12. A hot short metal is
  13. Residual stress in materials
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  16. Rankine's theory of failure is applicable for following type of materials
  17. A bolt is designed on the basis of __________ with a large factor of safety.
  18. Which of the following statement is wrong?
  19. Turn buckle has
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  23. The initial tension (in newtons) in a bolt used for making a fluid tight joint like steam engine cover…
  24. Wire ropes as compared to cotton ropes
  25. The temperature at which the new grains are formed in the metal is known as
  26. An elastic bar is fixed at the upper end and loaded at the lower end by a falling weight. The shock…
  27. During hot working of metals,
  28. A shaft is subjected to fluctuating loads for which the normal torque (T) and bending moment (M) are…
  29. For same pulley diameters, center distance, belt speed and belt and pulley materials,
  30. Which of the following statement is wrong?