Mechanical Engineering - Strength of Materials

16. 

The bending moment at a point on a beam is the algebraic __________ of all the moments on either side of the point.

A. sum
B. difference

Answer: Option A

Explanation:

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17. 

The maximum diameter of the hole that can be punched from a plate of maximum shear stress 1/4th of its maximum crushing stress of punch, is equal to (where t = Thickness of the plate)

A. t
B. 2t
C. 4t
D. 8t

Answer: Option C

Explanation:

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18. 

Two closely coiled helical springs 'A' and 'B' are equal in all respects but the number of turns of spring 'A' is half that of spring 'B' The ratio of deflections in spring 'A' to spring 'B' is

A. 1/8
B. 1/4
C. 1/2
D. 2

Answer: Option C

Explanation:

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19. 

The deformation per unit length is called

A. tensile stress
B. compressive stress
C. shear stress
D. strain

Answer: Option D

Explanation:

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20. 

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

A.
B.
C.
D.

Answer: Option D

Explanation:

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