Engineering :: Strength of Materials

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41.

A steel bar 2 m long, 20 mm wide and 10 mm thick is subjected to a pull of 2 kN. If the same bar is subjected to a push of 2 kN, the Poission's ratio of the bar in tension will be

A.	equal to	B.	less than
C.	greater than

42.

The Poisson's ratio for steel varies from

A.	0.23 to 0.27	B.	0.25 to 0.33
C.	0.31 to 0.34	D.	0.32 to 0.42

43.

The Poisson's ratio for cast iron varies from

A.	0.23 to 0.27	B.	0.25 to 0.33
C.	0.31 to 0.34	D.	0.32 to 0.42

44.

When a bar of length l, width b and thickness t is subjected to a pull of P, its

A.	length, width and thickness increases	B.	length, width and thickness decreases
C.	length increases, width and thickness decreases	D.	length decreases, width and thickness increases

45.

The ratio of change in volume to the original volume is called

A.	linear strain	B.	lateral strain
C.	volumetric strain	D.	Poisson's ratio

46.

When a bar of length l, width b and thickness t is subjected to a push of P, its

A.	length, width and thickness increases	B.	length, width and thickness decreases
C.	length increases, width and thickness decreases	D.	length decreases, width and thickness increases

47.

The volumetric strain is the ratio of the

A.	original thickness to the change in thickness	B.	change in thickness to the original thickness
C.	original volume to the change in volume	D.	change in volume to the original volume

48.

When a body is subjected to three mutually perpendicular stresses, of equal intensity, the ratio of direct stress to the corresponding volumetric strain is known as

A.	Young's modulus	B.	modulus of rigidity
C.	bulk modulus	D.	Poisson's ratio

49.

The ratio of bulk modulus to Young's modulus for a Poisson's ratio of 0.25 will be

A.	1 ?3	B.	2 ? 3
C.	1	D.	3 ? 2

50.

If the modulus of elasticity of a material is twice its modulus of rigidity, then the Poisson's ratio of the material is equal to zero.

Correct

Incorrect