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25.

The connecting rod bolts are tightened up with initial tension greater than the external load so that

A.	joint may not open up	B.	bolts are weakest elements
C.	the resultant load on the bolt would not be affected by the external cyclic load	D.	bolts will not loosen during service

26.

The edges of the plates for cylindrical vessels are usually bevelled to an angle of 80° for

A.	reducing stress concentration	B.	ease of manufacture
C.	safety	D.	fullering and caulking

27.

The piston rod of a steam engine is usually connected to the cross head by means of

A.	bolted joint	B.	knuckle joint
C.	cotter joint	D.	universal joint

28.

The rated life of a bearing varies

A.	directly as load	B.	inversely as square of load
C.	inversely as cube of load	D.	inversely as fourth power of load

29.

The shearing stresses in the inner face as compared to outer face of the wire in a heavy close coiled spring is

A.	larger	B.	smaller
C.	equal	D.	larger/smaller depending on diameter of spring coil

30.

The usual clearance provided in hydrodynamic bearing per mm of diameter of shaft is

A.	0.01 micron	B.	0.1 micron
C.	1 micron	D.	10 microns

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