Mechanical Engineering - Strength of Materials

1. 

The shear force and bending moment are zero at the free end of a cantilever beam, if it carries a

A. point load at the free end
B. point load at the middle of its length
C. uniformly distributed load over the whole length
D. none of the above

Answer: Option C

Explanation:

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2. 

A rod is enclosed centrally in a tube and the assembly is tightened by rigid washers. If the assembly is subjected to a compressive load, then

A. rod is under compression
B. tube is under compression
C. both rod and tube are under compression
D. tube is under tension and rod is under compression

Answer: Option C

Explanation:

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3. 

A bar of length L metres extends by l mm under a tensile force of P. The strain produced in the bar is

A. l/L
B. 0.1 l/L
C. 0.01 l/L
D. 0.001 l/L

Answer: Option D

Explanation:

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4. 

A shaft revolving at ω rad / s transmits torque (T) in N-m. The power developed is

A. T.ω watts
B. 2 π Tω watts
C. watts
D. watts

Answer: Option A

Explanation:

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5. 

The unit of modulus of elasticity is same as those of

A. stress, strain and pressure
B. stress, force and modulus of rigidity
C. strain, force and pressure
D. stress, pressure and modulus of rigidity

Answer: Option D

Explanation:

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