# Mechanical Engineering - Strength of Materials

### Exercise :: Strength of Materials - Section 1

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

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

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

Explanation:

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19.

The deformation per unit length is called

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

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. 