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191.

The ratio of maximum shear stress to the average shear stress in a rectangular beam subjected to torsion is

A.	2?3	B.	3?4
C.	4?5	D.	5?4
E.	3?2

192.

In case of a hinged support, the reaction

A.	Acts perpendicular to the surface of hinge	B.	Acts perpendicular to the beam
C.	Acts along the axis of beam	D.	Acts in a direction opposite to the resultant shear force at the support
E.	In a direction which depends on the loads

193.

Which of the following is dimensionless?

A.	Bulk modulus	B.	Strain
C.	Shear stress	D.	Coefficient of linear expansion
E.	Thermal stress

194.

For which of following material the value of Poissons ratio is more than 1?

A.	Cork	B.	Dead mild steel
C.	Wood	D.	Plastic
E.	None of the above

195.

The loss of strength in compression due to overloading is known as

A.	Creep	B.	Bauschinger effect
C.	Relaxation	D.	Resilience
E.	Hysteresis

196.

The method of increasing fatigue resistance by over-stressing the metal by successively increasing loading is known as

A.	Coaxing	B.	Relaxing
C.	Compounding	D.	Bauschinger effect
E.	None of the above

197.

In M.L.T. system the dimensions of Young's modulus of elasticity are

A.	MLT	B.	MLT-1
C.	MLT-2	D.	ML-1 T-2
E.	ML-2 T-2

198.

A beam supporting a uniformly distributed load over its entire length L is pinned at one end and passes over a roller support at a distance x from the other end. The value of x such that the greatest bending moment in the beam is as small as possible, will be

A.	0.111 L	B.	0.125 L
C.	0.2 L	D.	0.293 L
E.	0.33 L

199.

The stress in the cylinder will be

A.	6 N/mm2	B.	12 N/mm2
C.	18 N/mm2	D.	20 N/mm2
E.	24 N/mm2

200.

If this shaft is to be replaced by a hollow shaft of texternal diameter 22 mm for the same maximum shear stress and same torque, the internal diameter will be

A.	11 mm	B.	15.5 mm
C.	21 mm	D.	31 mm
E.	51 mm