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381.

Bolts in structures are often tightened upto or beyond the yield point because

A.	frction is more beyond yield point thus providing a firm joint	B.	temperature variations may loosen the joint
C.	it improves endurance strength	D.	all of the above

382.

Bolted joints often fail in

A.	shear only	B.	compresson only
C.	tension only	D.	torsion only

383.

Lag bolts are generally used

A.	for fastening castings	B.	in wooden construction
C.	in electrical equipment	D.	for tapping holes

384.

Plow bolts are widely used in

A.	form machinery	B.	electrical fittings
C.	electronic components	D.	plastics

385.

Which type of loading should be avoided

A.	Cleavage loading	B.	Shear loading
C.	Tensile loading	D.	none of the above

386.

As far as possible adhesive joints should be loaded in

A.	shear	B.	torsion
C.	compression	D.	Any of the above

387.

The uniform rate of descent is maintained by a brake on the drum which applies the necessary torque of 300 kg-m what additional brake torque is required to bring the system to rest in 0.50 second?

A.	1027 N-m	B.	1580 N-m
C.	2054 N-m	D.	6235 N-m

388.

Which of the following drive has accurate speed ratio?

A.	Flat cross-belt drive	B.	V-belt 'B' section drive
C.	V-belt 'C' section drive	D.	Timing belt drive

389.

Teflon is used for bearings

A.	When low coefficient of friction is desired	B.	Space is the major consideration
C.	Heat dissipation is a problem	D.	When bearings operate at very high rpm

390.

In nylon bearings operate at very high rpm molybdenum disulphide as used mainly to

A.	reduce frictional losses	B.	assists in heat dissipation
C.	improve mechanical and lubricating properties	D.	provide porous bearing media for vibration absorption