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111.

The ratio of stress produced by suddenly applied load to that produced by the same load when gradually applied is

A.	4	B.	2
C.	1

112.

An unknown weight falls through 1 cm on a collar rigidly attached to the lower end of a vertical bar 3 m long and 6 m2 in section. If the maximum instantaneous extension is 2 mm the value of stress would be

A.	500 kg/cm2	B.	667 kg/cm2
C.	1000 kg/cm2	D.	1333 kg/cm2
E.	1500 kg/cm2

113.

The bending moment diagram in case of a cantilever beam carrying a linearly varying load from zero at free end to maximum at supported end will be a

A.	Rectangle	B.	Traingle
C.	Parabola	D.	Cubic parabola
E.	Inverse hyperbola

114.

With a punch for which the maximum crushing stress is 4 times the maximum shearing stress of the plate, the biggest hole that can be punched in the plate would be of diameter equal to

A.	4 times the thickness of plate	B.	2 times the thickness of plate
C.	Thickness of plate

115.

A uniform steel rope 400 metres long is hung vertically. The weight of the steel is 7.8 gm/cm3 and D = 2100 kg/mm2. The ratio of elongation of first 150 metres to that of first 300 metres would be

A.	16 ; 1	B.	4 ; 1
C.	2 ; 1	D.	1 ; 2
E.	1 ; 4

116.

A beam fixed at both ends with a central load W in the middle will have zero bending moment as

A.	One place	B.	Two places
C.	Three places	D.	Four places
E.	No where

117.

A vessel is said to be thin walled, when

A.	The vessel is made of thin sheets	B.	The vessel wall thickness is less than 1 mm
C.	The vessel wall thickness is equal to or less than 1/20 of the internal diameter of the vessel	D.	The vessel wall thickness is equal to or less than 1/10 of the internal diameter of the above
E.	None of the above

118.

For punching a hole of 25 mm diameter in a plate 20 mm thick, if the shear stress of plate material is 30 kg/mm2, the force required would be

A.	10,000 kg	B.	18,850 kg
C.	28,850 kg	D.	47,123 kg
E.	None of the above

119.

The ratio of bending moment at the centre of a simply supported beam of effective length L subjected to a central load W with that when the load W is uniformly distributed, will be

A.	8	B.	4
C.	2	D.	1

120.

Two shafts are made of mild steel one having circular cross-section and the other shaft is hollow circular with inner diameter half of the outer diameter. The ratio of the torque that can be transmitted in two cases will be

A.	2	B.	17/16
C.	1	D.	15/16
E.	7?8