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61.

The pulley in a belt drive acts as

62.

A nut and bolt form a

63.

The sum of the tensions when the belt is running on the pulley is

A.	Less than the initial tension	B.	More than the initial tension
C.	More than twise the initial tension	D.	Half the initial tension
E.	None of the above

64.

The angle of a V-belt is

65.

Nominal top width of a B type V-belt is

66.

V-belts with E type cross-section are generally used in

A.	Automobiles	B.	Small engines
C.	When driver and driven units are far off	D.	Heavy duty machines
E.	None of the above

67.

A V belt designated as C 3048/120 will have

A.	Approximately 120 inch inside length	B.	Approximately 120 cm inside length
C.	C section, length unspecified	D.	Width 120 mm
E.	None of the above

68.

In order that a belt may not run off the pulley

A.	It should be properly tightened	B.	The centre line of the belt as it approaches the pulley must lie in a plane perpendicular to the axis of that pulley
C.	The belt should be provided with frictional material	D.	The belt should be provided with a guide
E.	None of the above

69.

The 'crowning' of flat pulleys is generally done pulley

A.	To reduce belt friction	B.	To prevent belt joining from damaging the belt surface
C.	To prevent the belt from running off the pulley	D.	In case of cross belt drives only
E.	None of the above

70.

In case of belt drives, the effect of centrifugal tension is

A.	To reduce the driving power	B.	To increase the driving power
C.	Not appreciable on driving power	D.	Dependent on other factors
E.	None of the above