Machine Design - Interview Questions | Exam2Win

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36. When a bolt is subjected to shock loading, the resilience of the bolt should be considered in order to prevent breakage at

A. shank

B. head

C. in the middle

D. at the thread

E. anywhere in the bolt.

Explanation:

37. The connecting rod bolts are tightened up with initial tension greater than the external load so that

A. joint may not open up

B. bolts are weakest elements

C. the resultant load on the bolt would not be affected by the external cyclic load

D. bolts will not loosen during service

E. none of the above.

Explanation:

38. If an application calls for stresses on screw threads in one direction only, then the following type of thread would be best suited

A. square

B. acme

C. buttress

D. BSW

E. metric.

Explanation:

39. The shock absorbing capacity of a bolt can be increased by

A. tightening it properly

B. increasing shank diameter

C. grinding the shank

D. using washer

E. making shank diameter equal to core diameter of thread.

Explanation:

40. Which of the following is not correct procedure to increase the fatigue limit

A. cold working

B. shot peening

C. surface decarburisation

D. under-stressing

E. all of the above.

Explanation: