Strength Of Materials MCQ Questions & Answers

11

The slenderness ratio is the ratio of

A) Area of column to least radius of gyration B) Length of column to least radius of gyration C) Least radius of gyration to area of column D) Least radius of gyration to length of column

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Answer & Solution

Answer: Option B

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12

The ratio of bulk modulus to Young's modulus for a Poisson's ratio of 0.25 will be

A) $$\frac{1}{3}$$ B) $$\frac{2}{3}$$ C) 1 D) $$\frac{3}{2}$$

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Answer & Solution

Answer: Option B

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13

The strain energy stored in a hollow circular shaft of outer diameter (D) and inner diameter (d) subjected to shear stress is

A) $$\frac{{{\tau ^2}}}{{2{\text{C}}}}\left( {\frac{{{{\text{D}}^2} - {{\text{d}}^2}}}{{\text{D}}}} \right) \times {\text{Volume of shaft}}$$ B) $$\frac{{{\tau ^2}}}{{2{\text{C}}}}\left( {\frac{{{{\text{D}}^2} + {{\text{d}}^2}}}{{\text{D}}}} \right) \times {\text{Volume of shaft}}$$ C) $$\frac{{{\tau ^2}}}{{4{\text{C}}}}\left( {\frac{{{{\text{D}}^2} - {{\text{d}}^2}}}{{\text{D}}}} \right) \times {\text{Volume of shaft}}$$ D) $$\frac{{{\tau ^2}}}{{4{\text{C}}}}\left( {\frac{{{{\text{D}}^2} + {{\text{d}}^2}}}{{\text{D}}}} \right) \times {\text{Volume of shaft}}$$

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Answer & Solution

Answer: Option D

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14

Shear stress induced in a shaft subjected to tension will be

A) Maximum at periphery and zero at center B) Maximum at center C) Uniform throughout D) None of the above

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Answer & Solution

Answer: Option D

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15

The Young's modulus of a material is 125 GPa and Poisson’s ratio is 0.25. The modulus of rigidity of me material is

A) 30 GPa B) 50 GPa C) 80 GPa D) 100 GPa

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Answer & Solution

Answer: Option B

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16

When a body is subjected to a direct tensile stress ($$\sigma $$) in one plane, then tangential or shear stress on an oblique section of the body inclined at an angle $$\theta $$ to the normal of the section is

A) $$\sigma \sin 2\theta $$ B) $$\sigma \cos 2\theta $$ C) $$\frac{\sigma }{2}\sin 2\theta $$ D) $$\frac{\sigma }{2}\cos 2\theta $$

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Answer & Solution

Answer: Option C

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17

When a body is subjected to a direct tensile stress ($$\sigma $$) in one plane, then normal stress on an oblique section of the body inclined at an angle $$\theta $$ to the normal of the section is

A) $$\sigma \cos \theta $$ B) $$\sigma {\cos ^2}\theta $$ C) $$\sigma \sin\theta $$ D) $$\sigma {\sin ^2}\theta $$

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Answer & Solution

Answer: Option B

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18

In the below figure, the point C represents
Strength of Materials mcq question image

A) Elastic limit B) Upper yield point C) Lower yield point D) Breaking point

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Answer & Solution

Answer: Option C

Solution:

19

The maximum deflection of a fixed beam carrying a central point load lies at

A) Fixed ends B) Center of beam C) $$\frac{l}{3}$$ from fixed ends D) None of these

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Answer & Solution

Answer: Option B

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20

When a bar of length '$$l$$' and diameter 'd' is rigidly fixed at the upper end and hanging freely, then the total elongation produced in the bar due to its own weight is (where w = Weight per unit volume of the bar)

A) $$\frac{{{\text{w}}l}}{{2{\text{E}}}}$$ B) $$\frac{{{\text{w}}{l^2}}}{{2{\text{E}}}}$$ C) $$\frac{{{\text{w}}{l^3}}}{{2{\text{E}}}}$$ D) $$\frac{{{\text{w}}{l^4}}}{{2{\text{E}}}}$$

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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