Strength Of Materials MCQ Questions & Answers

31

Which of the following statement is wrong?

A) The deformation of the bar per unit length in the direction of the force is called linear strain. B) The Poisson's ratio is the ratio of lateral strain to the linear strain. C) The ratio of change in volume to the original volume is called volumetric strain. D) The bulk modulus is the ratio of linear stress to the linear strain.

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Answer & Solution

Answer: Option D

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32

Which of the following statement is wrong?

A) In the theory of simple bending, the assumption is that the plane sections before bending remains plane after bending. B) In a beam subjected to bending moment, the strain is directly proportional to the distance from the neutral axis. C) At the neutral axis of a beam, the bending stress is maximum. D) The bending stress in a beam is inversely proportional to the section modulus.

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Answer & Solution

Answer: Option C

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33

In Mohr's circle, the center of circle from Y-axis is taken as

A) $$\frac{{{\sigma _{\text{x}}} - {\sigma _{\text{y}}}}}{2}$$ B) $$\frac{{{\sigma _{\text{x}}} + {\sigma _{\text{y}}}}}{2}$$ C) $$\frac{{{\sigma _{\text{x}}} - {\sigma _{\text{y}}}}}{2} + \tau $$ D) $$\frac{{{\sigma _{\text{x}}} + {\sigma _{\text{y}}}}}{2} + \tau $$

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Answer & Solution

Answer: Option B

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34

A beam of uniform strength may be obtained by

A) Keeping the width uniform and varying the depth B) Keeping the depth uniform and varying the width C) Varying the width and depth both D) Any one of the above

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Answer & Solution

Answer: Option D

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35

Two shafts 'A' and 'B' transmit the same power. The speed of shaft 'A' is 250 r.p.m. and that of shaft 'B' is 300 r.p.m.

A) The shaft 'B' has the greater diameter B) The shaft 'A' has the greater diameter C) Both are of same diameter D) None of these

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Answer & Solution

Answer: Option B

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36

The maximum bending moment for the beam shown in the below figure, is
Strength of Materials mcq question image

A) $$\frac{{{\text{w}}{l^2}}}{{3\sqrt 3 }}$$ B) $$\frac{{{\text{w}}{l^2}}}{{6\sqrt 3 }}$$ C) $$\frac{{{\text{w}}{l^2}}}{{9\sqrt 3 }}$$ D) $$\frac{{{\text{w}}{l^2}}}{{12\sqrt 3 }}$$

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Answer & Solution

Answer: Option C

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37

The neutral axis of the cross-section a beam is that axis at which the bending stress is

A) Zero B) Minimum C) Maximum D) Infinity

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Answer & Solution

Answer: Option A

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38

The neutral axis of the cross-section of a beam is that axis at which the bending stress is

A) Zero B) Minimum C) Maximum D) Infinity

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Answer & Solution

Answer: Option A

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39

The torque transmitted by a solid shaft of diameter (D) is (where $$\tau $$ = Maximum allowable shear stress)

A) $$\frac{\pi }{4} \times \tau \times {{\text{D}}^3}$$ B) $$\frac{\pi }{{16}} \times \tau \times {{\text{D}}^3}$$ C) $$\frac{\pi }{{32}} \times \tau \times {{\text{D}}^3}$$ D) $$\frac{\pi }{{64}} \times \tau \times {{\text{D}}^3}$$

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Answer & Solution

Answer: Option B

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40

The torque transmitted by a hollow shaft of outer diameter (d₁) and inner diameter (d₂) is (where, $$\tau $$ = Maximum allowable shear stress)

A) $$\frac{\pi }{4} \times \tau \times \frac{{{\text{d}}_1^4 - {\text{d}}_2^4}}{{{{\text{d}}_1}}}$$ B) $$\frac{\pi }{{16}} \times \tau \times \frac{{{\text{d}}_1^4 - {\text{d}}_2^4}}{{{{\text{d}}_1}}}$$ C) $$\frac{\pi }{{32}} \times \tau \times \frac{{{\text{d}}_1^4 - {\text{d}}_2^4}}{{{{\text{d}}_1}}}$$ D) $$\frac{\pi }{{64}} \times \tau \times \frac{{{\text{d}}_1^4 - {\text{d}}_2^4}}{{{{\text{d}}_1}}}$$

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Answer & Solution

Answer: Option B

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

Strength Of Materials MCQ Questions & Answers | Mechanical Engineering