Strength Of Materials MCQ Questions & Answers | Mechanical Engineering

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.

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.

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. $$\frac{{{\sigma _{\text{x}}} + {\sigma _{\text{y}}}}}{2} + \tau $$

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

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

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. $$\frac{{{\text{w}}{l^2}}}{{12\sqrt 3 }}$$

A. Zero

B. Minimum

C. Maximum

D. Infinity

A. Zero

B. Minimum

C. Maximum

D. Infinity

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. $$\frac{\pi }{{64}} \times \tau \times {{\text{D}}^3}$$

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. $$\frac{\pi }{{64}} \times \tau \times \frac{{{\text{d}}_1^4 - {\text{d}}_2^4}}{{{{\text{d}}_1}}}$$