Strength Of Materials MCQ Questions & Answers

81

The buckling load for a given column depends upon

A) Area of cross-section of the column B) Length and least radius of gyration of the column C) Modulus of elasticity for the material of the column D) All of the above

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Answer & Solution

Answer: Option D

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82

A load which is spread over a beam in such a manner that it varies uniformly over the whole length of abeam is called uniformly ________ load.

A) Distributed B) Varying C) Both A and B D) None of these

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Answer & Solution

Answer: Option B

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83

A continuous beam is one which is

A) Fixed at both ends B) Fixed at one end and free at the other end C) Supported on more than two supports D) Extending beyond the supports

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Answer & Solution

Answer: Option C

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84

A cantilever beam is one which is

A) Fixed at both ends B) Fixed at one end and free at the other end C) Supported at its ends D) Supported on more than two supports

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Answer: Option B

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85

A body is subjected to two normal stresses 20 kN/m² (tensile) and 10 kN/m² (compressive) acting perpendicular to each other. The maximum shear stress is

A) 5 kN/m² B) 10 kN/m² C) 15 kN/m² D) 20 kN/m²

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Answer & Solution

Answer: Option C

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86

When a body is subjected to biaxial stress i.e. direct stresses ($${\sigma _{\text{x}}}$$) and ($${\sigma _{\text{y}}}$$) in two mutually perpendicular planes accompanied by a simple shear stress ($${\tau _{{\text{xy}}}}$$ ), then maximum shear stress is

A) $$\frac{1}{2}\sqrt {{{\left( {{\sigma _{\text{x}}} - {\sigma _{\text{y}}}} \right)}^2} + 4\tau _{{\text{xy}}}^2} $$ B) $$\frac{1}{2}\sqrt {{{\left( {{\sigma _{\text{x}}} + {\sigma _{\text{y}}}} \right)}^2} + 4\tau _{{\text{xy}}}^2} $$ C) $$\sqrt {{{\left( {{\sigma _{\text{x}}} - {\sigma _{\text{y}}}} \right)}^2} + \tau _{{\text{xy}}}^2} $$ D) $$\sqrt {{{\left( {{\sigma _{\text{x}}} + {\sigma _{\text{y}}}} \right)}^2} + \tau _{{\text{xy}}}^2} $$

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Answer & Solution

Answer: Option A

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87

When a body is subjected to a direct tensile stress ($${\sigma _{\text{x}}}$$) in one plane accompanied by a simple shear stress ($${\tau _{{\text{xy}}}}$$ ), the maximum shear stress is

A) $$\frac{{{\sigma _{\text{x}}}}}{2} + \frac{1}{2}\sqrt {\sigma _{\text{x}}^2 + 4\tau _{{\text{xy}}}^2} $$ B) $$\frac{{{\sigma _{\text{x}}}}}{2} - \frac{1}{2}\sqrt {\sigma _{\text{x}}^2 + 4\tau _{{\text{xy}}}^2} $$ C) $$\frac{{{\sigma _{\text{x}}}}}{2} + \frac{1}{2}\sqrt {\sigma _{\text{x}}^2 - 4\tau _{{\text{xy}}}^2} $$ D) $$\frac{1}{2}\sqrt {\sigma _{\text{x}}^2 + 4\tau _{{\text{xy}}}^2} $$

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Answer & Solution

Answer: Option D

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88

Two bars of different materials and same size are subjected to the same tensile force. If the bars have unit elongation in the ratio of 2 : 5, then the ratio of modulus of elasticity of the two materials will be

A) 2 : 5 B) 5 : 2 C) 4 : 3 D) 3 : 4

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Answer: Option B

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89

Whenever some external system of forces acts on a body, it undergoes some deformation. As the body undergoes some deformation, it sets up some resistance to the deformation. This resistance per unit area to deformation, is called

A) Strain B) Stress C) Pressure D) Modulus of elasticity

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Answer & Solution

Answer: Option B

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90

Elasticity of Mild Steel specimen is defined by

A) Hooke’s law B) Yield point C) Plastic flow D) Proof stress

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Answer & Solution

Answer: Option C

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

Strength Of Materials MCQ Questions & Answers | Mechanical Engineering