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Strength of Materials MCQ Question with Answer

Strength of Materials MCQ with detailed explanation for interview, entrance and competitive exams. Explanation are given for understanding.

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Question No : 50
If the slenderness ratio for a column is 100, then it is said to be a _________ column.

Long
Medium
Short
None of these
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Question No : 51
In a tensile test on mild steel specimen, the breaking stress as compared to ultimate tensile stress is

More
Less
Same
More/less depending on composition
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Question No : 52
The torsional rigidity of a shaft is expressed by the

Maximum torque it can transmit
Number of cycles it undergoes before failure
Elastic limit up to which it resists torsion, shear and bending stresses
Torque required to produce a twist of one radian per unit length of shaft
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Question No : 53
When a body is subjected to a direct tensile stress (σx) in one plane accompanied by a simple shear stress (τxy), the maximum shear stress is

(σx/2) + (1/2) × √(σx² + 4 τ²xy)
(σx/2) - (1/2) × √(σx² + 4 τ²xy)
(σx/2) + (1/2) × √(σx² - 4 τ²xy)
(1/2) × √(σx² + 4 τ²xy)
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Question No : 54
The point of contraflexure is a point where

Shear force changes sign
Bending moment changes sign
Shear force is maximum
Bending moment is maximum
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Question No : 55
Slenderness of a column is zero when

Ends are firmly fixed
Column is supported on all sides throughout the length
Length is equal to radius of gyration
Length is twice the radius of gyration
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Question No : 56
Which of the following materials is most elastic?

Rubber
Plastic
Brass
Steel
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