Mechanical Engineering - Strength of Materials

1. 

The maximum shear stress in a thin cylindrical shell subjected to internal pressure p is

A. pd/t
B. pd/2t
C. pd/4t
D. pd/8t

Answer: Option D

Explanation:

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2. 

When a shaft, is subjected to torsion, the shear stress induced in the shaft varies from

A. minimum at the centre to maximum at the circumference
B. maximum at the centre to minimum at the circumference
C. zero at the centre to maximum at the circumference
D. maximum at the centre to zero at the circumference

Answer: Option C

Explanation:

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3. 

The maximum bending moment for a simply supported beam with a gradually varying load from zero at both ends and w per metre at the centre, lies at the centre of a beam.

A. Agree
B. Disagree

Answer: Option A

Explanation:

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4. 

A body is subjected to a tensile stress of 1200 MPa on one plane and another tensile stress of 600 MPa on a plane at right angles to the former. It is also subjected to a shear stress of 400 MPa on the same planes. The maximum shear stress will be

A. 400 MPa
B. 500 MPa
C. 900 MPa
D. 1400 MPa

Answer: Option B

Explanation:

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5. 

A shaft of diameter D is subjected to a twisting moment (T) and a bending moment (M). If the maximum bending stress is equal to maximum shear stress developed, then M is equal to

A. T/2
B. T
C. 2T
D. 4T

Answer: Option A

Explanation:

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