Strength Of Materials MCQ Questions & Answers

1

When a shaft is subjected to a twisting moment, every cross-section of the shaft will be under

A) Tensile stress B) Compressive stress C) Shear stress D) Bending stress

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Answer & Solution

Answer: Option C

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2

The maximum shear stress developed in a beam of circular section is __________ the average shear stress.

A) Equal to B) $$\frac{4}{3}$$ times C) 1.5 times D) Twice

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Answer & Solution

Answer: Option B

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3

The maximum shear stress developed in a beam of rectangular section is __________ the average shear stress.

A) Equal to B) $$\frac{4}{3}$$ times C) 1.5 times D) Twice

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Answer & Solution

Answer: Option C

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4

When a load on the free end of a cantilever beam is increased, failure will occur

A) At the free end B) At the fixed end C) In the middle of the beam D) At a distance $$\frac{{2l}}{3}$$ from free end

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Answer & Solution

Answer: Option B

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5

A beam is loaded as cantilever. If the load at the end is increased, the failure will occur

A) In the middle B) At the tip below the load C) At the support D) Anywhere

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Answer & Solution

Answer: Option C

Solution:

In a cantilever beam, the maximum bending moment occurs at the support where the beam is fixed.

When the load at the end is increased, the stress at the support increases significantly.

As a result, the failure is most likely to occur at the support, where the bending stress is the highest.

6

Strain energy is the

A) Energy stored in a body when strained within elastic limits B) Energy stored in a body when strained up to the breaking of a specimen C) Maximum strain energy which can be stored in a body D) Proof resilience per unit volume of a material

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Answer & Solution

Answer: Option A

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7

At the neutral axis of a beam

A) The layers are subjected to maximum bending stress B) The layers are subjected to minimum bending stress C) The layers are subjected to compression D) The layers do not undergo any strain

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Answer & Solution

Answer: Option D

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8

For a given stress, the ratio of moment of resistance of a beam of square cross-section when placed with its two sides horizontal to the moment of resistance with its diagonal horizontal, is

A) $$\frac{1}{2}$$ B) 1 C) $$\frac{1}{{\sqrt 2 }}$$ D) $$\sqrt 2 $$

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Answer & Solution

Answer: Option D

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9

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 normal stress will be

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

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Answer & Solution

Answer: Option D

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10

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 minimum normal stress will be

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

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Answer & Solution

Answer: Option A

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Strength Of Materials MCQ Questions &amp; Answers | Mechanical Engineering

Strength Of Materials MCQ Questions & Answers | Mechanical Engineering