Machine Design - Interview Questions | Exam2Win

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51. In the case of an elastic bar fixed at upper end and loaded by a falling weight at lower end, the shock load produced can be decreased by

A. decreasing the cross-section area of' bar

B. increasing the cross-section area of bar

C. remain unaffected with cross-section area

D. would depend upon other factors

E. none of the above.

Explanation:

52. The endurance limit of a material with finished surface in comparison to rough surface is

A. more

B. less

C. same

D. more or less depending on quantum of load

E. unpredictable.

Explanation:

53. A stud

A. has a head on one end and a nut fitted to the other

B. has head at one end and other end fits into a tapped hole in the other part to be joined

C. has both the ends threaded

D. has pointed threads

E. requires locking nuts.

Explanation:

54. Shear stress theory is applicable for

A. ductile fnaterials

B. brittle materials

C. elastic materials

D. all of the above

E. none of the above.

Explanation:

55. The building up of worn and uridersized parts, subjected to repeated loads by electroplating is

A. best method

B. extremely hazardous

C. has no effect as regards fatigue strength

D. cheapest method

E. all of the above.

Explanation: