Strength Of Materials MCQ Questions & Answers

11

When a circular bar tapering uniformly from diameter d₁, at one end to diameter d₂ at the other end, is subjected to an increase in temperature (t), then the thermal stress induced is (where $$\alpha $$ = Coefficient of linear expansion and E = Modulus of elasticity for the bar material)

A) $$\frac{{\alpha {\text{tE}}{{\text{d}}_1}}}{{{{\text{d}}_2}}}$$ B) $$\frac{{\alpha {\text{t}}{{\text{d}}_1}}}{{{\text{E}}{{\text{d}}_2}}}$$ C) $$\frac{{\alpha {\text{t}}{{\text{d}}_2}}}{{{\text{E}}{{\text{d}}_1}}}$$ D) $$\frac{{{\text{t}}{{\text{d}}_1}}}{{\alpha {\text{E}}{{\text{d}}_2}}}$$

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Answer & Solution

Answer: Option A

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12

In a beam subjected to pure bending, the intensity of stress in any fibre is _________ the distance of the fibre from the neutral axis.

A) Equal to B) Less than C) More than D) Directly proportional to

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Answer & Solution

Answer: Option D

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13

When a beam is subjected to a bending moment, the strain in a layer is __________ the distance from the neutral axis.

A) Equal to B) Directly proportional to C) Inversely proportional to D) Independent of

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Answer & Solution

Answer: Option B

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14

When a beam is subjected to bending moment, the stress at any point is __________ the distance of the point from the neutral axis.

A) Equal to B) Directly proportional to C) Inversely proportional to D) Independent of

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Answer & Solution

Answer: Option B

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15

The strength of the shaft is judged by the_____________.

A) Torque transmitted by the shaft B) Length of the shaft C) Dia. of the shaft D) None of these

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Answer & Solution

Answer: Option A

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16

According to Euler's column theory, the crippling load of a column is given by $${\text{p}} = \frac{{{\pi ^2}{\text{E}}I}}{{{\text{C}}{l^2}}}.$$ In the Euler's formula, the value of C for a column with one end fixed and the other end free, is

A) $$\frac{1}{2}$$ B) 1 C) 2 D) 4

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Answer & Solution

Answer: Option D

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17

A pressure vessel is said to be a thick shell, when

A) It is made of thick sheets B) The internal pressure is very high C) The ratio of wall thickness of the vessel to its diameter is less than $$\frac{1}{{10}}$$ D) The ratio of wall thickness of the vessel to its diameter is greater than $$\frac{1}{{10}}$$

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Answer & Solution

Answer: Option D

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18

The stress necessary to initiate yielding is

A) Considerably greater than that necessary to continue it B) Considerably lesser than that necessary to continue it C) Greater than that necessary to stop it D) Lesser than that necessary to stop it

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Answer & Solution

Answer: Option A

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19

In the below figure, the plastic range occurs
Strength of Materials mcq question image

A) Before point A B) Beyond point A C) Between points A and D D) Between points D and E

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Answer & Solution

Answer: Option B

Solution:

20

A thin cylindrical shell of diameter (d), length ($$l$$) and thickness (t) is subjected to an internal pressure (p). The ratio of longitudinal strain to hoop strain is

A) $$\frac{{{\text{m}} - 2}}{{2{\text{m}} - 1}}$$ B) $$\frac{{2{\text{m}} - 1}}{{{\text{m}} - 2}}$$ C) $$\frac{{{\text{m}} - 2}}{{2{\text{m}} + 1}}$$ D) $$\frac{{2{\text{m}} + 1}}{{{\text{m}} - 2}}$$

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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