Mechanical Engineering - Strength of Materials

1. 

In a beam of uniform strength, the bending stress developed is constant and is equal to the allowable stress at every section of the beam.

A. True
B. False

Answer: Option A

Explanation:

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2. 

The bending moment of a cantilever beam of length l and carrying a uniformly distributed load of w per unit length is __________ at the fixed end.

A. wl/4
B. wl/2
C. wl
D. wl2/2

Answer: Option D

Explanation:

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3. 

Two shafts 'A' and 'B' are made of same material. The shaft 'A' is of diameter D and shaft 'B' is of diameter D/2. The strength of shaft 'B' is __________ as that of shaft 'A'

A. one-eighth
B. one-fourth
C. one-half
D. four times

Answer: Option A

Explanation:

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4. 

A body is subjected to a direct tensile stress (σ) in one plane. The shear stress is maximum at a section inclined at __________ to the normal of the section.

A. 45° and 90°
B. 45° and 135°
C. 60° and 150°
D. 30° and 135°

Answer: Option B

Explanation:

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5. 

The bending moment on a section is maximum where shear force is

A. minimum
B. maximum
C. changing sign
D. zero

Answer: Option C

Explanation:

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