Mechanical Engineering - Strength of Materials

26. 

The point of contraflexure is a point where

A. shear force changes sign
B. bending moment changes sign
C. shear force is maximum
D. bending moment is maximum

Answer: Option B

Explanation:

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27. 

The simply supported beam 'A' of length l carries a central point load W. Another beam 'B' is loaded with a uniformly distributed load such that the total load on the beam is W. The ratio of maximum deflections between beams A and B is

A. 5/8
B. 8/5
C. 5/4
D. 4/5

Answer: Option B

Explanation:

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28. 

The maximum stress produced in a bar of tapering section is at

A. smaller end
B. larger end
C. middle
D. anywhere

Answer: Option A

Explanation:

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29. 

The energy stored in a body when strained within elastic limit is known as

A. resilience
B. proof resilience
C. strain energy
D. impact energy

Answer: Option C

Explanation:

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30. 

In compression test, the fracture in cast iron specimen would occur along

A. the axis of load
B. an oblique plane
C. at right angles to the axis of specimen
D. would not occur

Answer: Option B

Explanation:

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