Strength Of Materials MCQ Questions & Answers

61

After reaching the yielding stage while testing a mild steel specimen, strain

A) Becomes constant B) Starts decreasing C) Increases without any increase in load D) None of the above

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Answer & Solution

Answer: Option C

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62

The load required to produce a unit deflection in a spring is called

A) Flexural rigidity B) Torsional rigidity C) Spring stiffness D) Young's modulus

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Answer & Solution

Answer: Option C

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63

When a closely-coiled helical spring of mean diameter (D) is subjected to an axial load (W), the deflection of the spring ($$\delta $$) is given by (where d = Diameter of spring wire, n = No. of turns of the spring and C = Modulus of rigidity for the spring material)

A) $$\frac{{{\text{W}}{{\text{D}}^3}{\text{n}}}}{{{\text{C}}{{\text{d}}^4}}}$$ B) $$\frac{{2{\text{W}}{{\text{D}}^3}{\text{n}}}}{{{\text{C}}{{\text{d}}^4}}}$$ C) $$\frac{{4{\text{W}}{{\text{D}}^3}{\text{n}}}}{{{\text{C}}{{\text{d}}^4}}}$$ D) $$\frac{{8{\text{W}}{{\text{D}}^3}{\text{n}}}}{{{\text{C}}{{\text{d}}^4}}}$$

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Answer & Solution

Answer: Option D

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64

The value of Poisson's ratio for steel is between

A) 0.01 to 0.1 B) 0.23 to 0.27 C) 0.25 to 0.33 D) 0.4 to 0.6

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Answer & Solution

Answer: Option C

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65

The intensity of stress which causes unit strain is called

A) Unit mass B) Modulus of rigidity C) Bulk modulus D) Modulus of Elasticity

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Answer & Solution

Answer: Option D

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66

The ratio of the lateral strain to the linear strain is called

A) Modulus of elasticity B) Modulus of rigidity C) Bulk modulus D) Poisson's ratio

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Answer & Solution

Answer: Option D

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67

The ratio of linear stress to the linear strain is called

A) Modulus of rigidity B) Modulus of elasticity C) Bulk modulus D) Poisson's ratio

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Answer & Solution

Answer: Option B

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68

The force acting along the circumference will cause stress in the walls in a direction normal to the longitudinal axis of cylinder? This stress is called

A) Longitudinal stress B) Hoop stress C) Yield stress D) Ultimate stress

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Answer & Solution

Answer: Option B

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69

A beam of triangular section is placed with its base horizontal. The maximum shear stress occurs at

A) Apex of the triangle B) Mid of the height C) Center of gravity of the triangle D) Base of the triangle

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Answer: Option B

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70

A leaf spring is supported at the

A) Ends and loaded at the center B) Center and loaded at the ends C) Ends and loaded anywhere D) Center and loaded anywhere

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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