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Engineering
Mechanical
ME Set-3
Theory of Machines
66

Theory of Machines MCQ with Answers

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

brittle

ductile

elastic

plastic

Answer is:

brittle

Theory of Machines MCQ with Answers

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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

vVvF

WpE/2

IvHpE

Answer is:

vpE

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

Brinell

Rockwell

Vicker

Shore′s sceleroscope

Answer is:

Brinell

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

combined loading

fatigue

thermal stresses

shock loading

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

decreasing the cross-section area of′ bar

increasing the cross-section area of bar

remain unaffected with cross-section area

would depend upon other factors

Answer is:

decreasing the cross-section area of′ bar

Theory of Machines MCQ with Answers

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

brittle

Theory of Machines MCQ with Answers

Related Theory of Machines MCQ with Answers

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

Theory of Machines MCQ with Answers