Theory of Machines MCQ with Answers

66) Rankine′s theory of failure is applicable for following type of materials

Answer is:

brittle

67) If an unsupported uniform cross sectional elastic bar is subjected to a longitudinal impact from a rigid bob moving with velocity v, then a compressive wave of intensity sc is propagated through the bar as follows

Answer is:

vpE

68) Tensile strength of a mild steel specimen can be roughly predicted from following hardness test

Answer is:

Brinell

69) Resilience of a material is important, when it is subjected to

Answer is:

shock loading

Explanation:

The strain energy stored in a body due to external loading within the elastic limit is known as resilience.
Resilience of a material is important, when it is subjected to shock loading.

70) 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

Answer is:

66) Rankine′s theory of failure is applicable for following type of materials

brittle

67) If an unsupported uniform cross sectional elastic bar is subjected to a longitudinal impact from a rigid bob moving with velocity v, then a compressive wave of intensity sc is propagated through the bar as follows

vpE

68) Tensile strength of a mild steel specimen can be roughly predicted from following hardness test

Brinell

69) Resilience of a material is important, when it is subjected to

shock loading

70) 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

decreasing the cross-section area of′ bar