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121.

The buckling load depends on

A.	Modulus of elasticity	B.	Slendemess ratio
C.	Cross-sectional area	D.	All of the above
E.	None of the above

122.

The column which has the highest equivalent length has

A.	Both ends fixed	B.	One end fixed and other end free
C.	Both ends hinged and pin joined	D.	One end fixed and other end hinged
E.	None of the above

123.

The compression formula is valid upto the slenderness ratio of

A.	10	B.	15
C.	25	D.	30
E.	40

124.

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

A.	An oblique plane	B.	Along the axis of the load
C.	At right angles to the specimen axis	D.	Fracture will not occur in cast iron
E.	None of the above

125.

The approximate value of allowable stress for carbon steel under static loading (in kg/cm2) is

A.	500-1000	B.	4000-7500
C.	10000-15000	D.	15000-20000
E.	20000-25000

126.

The shock absorbing capacity of a bolt is increased by

A.	Proper tightening	B.	Use of a spring washer
C.	Making shank diameter equal to the core diameter	D.	Preventingstress concentration any where in the bolt
E.	None of the above

127.

A compressed air cylinder carries approximately 70 kg/cm2 pressure at the time of delivery. The inside diameter is 25 cm. If the steel has a yield point of 2300 kg/sq cm and a safety factor of 2.5 the wall thickness should be

A.	5 mm	B.	8 mm
C.	10 mm	D.	12 mm
E.	15 mm

128.

A spherical metal vessel 120 cm diameter is subjected to an internal pressure of 15 kg/sq cm. If the permissible stress is 625 kg/sq cm and the efficiency of the riveted joints is 75%, the required thickness of the plate would be

A.	1 mm	B.	2 mm
C.	5 mm	D.	8 mm
E.	10 mm

129.

A suspended body is to be struck heavily without producing any reaction at the support. It should be hit at

A.	Centre of gravity	B.	Metacentre
C.	Centroid	D.	Centre of spin
E.	Centre of percussion

130.

What type of gears are provided in a switch gear?

A.	Spur gears	B.	Helical gear
C.	Bevel gears	D.	Herringbone gears
E.	None of the above