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49.

The total elongation produced in a bar of uniform section hanging vertically downwards due to its own weight is equal to that produced by a weight

A.	of same magnitude as that of bar and applied at the lower end	B.	half the weight of bar applied at lower end
C.	half of the square of weight of bar applied at lower end	D.	one-fourth of weight of bar applied at lower end

50.

The total strain energy stored in a body is termed as

A.	resilience	B.	proof resilience
C.	modulus of resilience	D.	toughness

51.

The ultimate tensile stress of mild steel compared to ultimate compressive stress is

A.	same	B.	more
C.	less	D.	more or less depending on other factors

52.

The value of modulus of elasticity for mild steel is of the order of

A.	2.1xl05 kg/cm2	B.	2.1 X 106 kg/cm2
C.	2.1 x 107 kg/cm2	D.	0.1 xlO6 kg/cm2

53.

The value of Poisson's ratio for cast iron is

A.	0.1 to 0.2	B.	0.23 to 0.27
C.	0.25 to 0.33	D.	0.4 to 0.6

54.

The value of Poisson's ratio for steel is between

A.	0.01 to 0.1	B.	0.23 to 0.27
C.	0.25 to 0.33	D.	0.4 to 0.6

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