Strength Of Materials MCQ Questions & Answers

71

The assumption, generally, made in the theory of simple bending is that

A) The beam material is perfectly homogeneous and isotropic B) The beam material is stressed within its elastic limit C) The plane sections before bending remain plane after bending D) All of the above

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Answer & Solution

Answer: Option D

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72

The thermal stress in a bar is __________ proportional to the change in temperature.

A) Directly B) Indirectly C) Both A and B D) None of these

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Answer: Option A

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73

The maximum shear stress, in the given figure, is equal to __________ of the Mohr's circle.
Strength of Materials mcq question image

A) Radius B) Diameter C) Circumference D) Area

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Answer & Solution

Answer: Option A

Solution:

74

Percentage reduction in area performing tensile test on cast iron may be of the order of

A) 50% B) 25% C) 20% D) 30%

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Answer: Option C

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75

The percentage reduction in area of a cast iron specimen during tensile test would be of the order of

A) More than 50% B) 25 - 50% C) 10 - 25% D) Negligible

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Answer: Option D

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76

Percentage reduction of area in performing tensile test on cast iron may be of the order of

A) 50% B) 25% C) 0% D) 15%

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Answer: Option C

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77

A thick cylindrical shell having r_o and r_i as outer and inner radii, is subjected to an internal pressure (p). The maximum tangential stress at the inner surface of the shell is

A) $$\frac{{{\text{r}}_{\text{o}}^2 - {\text{r}}_{\text{i}}^2}}{{2{\text{pr}}_{\text{i}}^2}}$$ B) $$\frac{{2{\text{pr}}_{\text{i}}^{\text{2}}}}{{{\text{r}}_{\text{o}}^2 - {\text{r}}_{\text{i}}^2}}$$ C) $$\frac{{{\text{p}}\left( {{\text{r}}_{\text{o}}^2 + {\text{r}}_{\text{i}}^2} \right)}}{{{\text{r}}_{\text{o}}^2 - {\text{r}}_{\text{i}}^2}}$$ D) $$\frac{{{\text{p}}\left( {{\text{r}}_{\text{o}}^2 - {\text{r}}_{\text{i}}^2} \right)}}{{{\text{r}}_{\text{o}}^2 + {\text{r}}_{\text{i}}^2}}$$

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Answer & Solution

Answer: Option C

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78

In a thick cylindrical shell subjected to an internal pressure (p), the maximum radial stress at the inner surface of the shell is

A) Zero B) p (tensile) C) -p (compressive) D) 2p (tensile)

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Answer: Option C

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79

A thick cylindrical shell having r_o and r_i as outer and inner radii, is subjected to an internal pressure (p). The maximum tangential stress at the inner surface of the shell is

A) $$\frac{{{\text{p}}\left( {{\text{r}}_{\text{o}}^2 + {\text{r}}_{\text{i}}^2} \right)}}{{{\text{r}}_{\text{o}}^2 - {\text{r}}_{\text{i}}^2}}$$ B) $$\frac{{{\text{p}}\left( {{\text{r}}_{\text{o}}^2 - {\text{r}}_{\text{i}}^2} \right)}}{{{\text{r}}_{\text{o}}^2 + {\text{r}}_{\text{i}}^2}}$$ C) $$\frac{{2{\text{pr}}_{\text{i}}^{\text{2}}}}{{{\text{r}}_{\text{o}}^2 - {\text{r}}_{\text{i}}^2}}$$ D) $$\frac{{{\text{r}}_{\text{o}}^2 - {\text{r}}_{\text{i}}^2}}{{2{\text{pr}}_{\text{i}}^2}}$$

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Answer: Option A

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80

A column of length ($$l$$) with both ends fixed may be considered as equivalent to a column of length __________ with one end fixed and the other end free.

A) $$\frac{l}{8}$$ B) $$\frac{l}{4}$$ C) $$\frac{l}{2}$$ D) $$l$$

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Answer: Option B

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

Strength Of Materials MCQ Questions & Answers | Mechanical Engineering