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49.

In multi-V-belt transmission, if one of the belt is broken, we have to change the

A.	broken belt	B.	broken belt and its adjacent belts
C.	all the belts	D.	there is no need of changing any one as remaining belts can take care of transmission of load

50.

In problem 47, the chain is constrained when

A.	L.H.S. = R.H.S.	B.	L.H.S. < R.H.S.
C.	L.H.S. > R.H.S.	D.	there is no such criterion for checking above requirement

51.

It is required to connect two parallel shafts, the distance between whose axes is small and variable. The shafts are coupled by

A.	universal joint	B.	knuckle joint
C.	Oldham's coupling	D.	flexible coupling

52.

Kinematic pairs are those which have

A.	point or line contact between the two elements when in motion	B.	surface contact between the two elements when in motion
C.	elements of pairs not held together mechanically	D.	two elements that permit relative motion

53.

Kinematic pairs are those which have two elements that

A.	have line contact	B.	have surface contact
C.	permit relative motion	D.	are held together

54.

Lower pairs are those which have

A.	point or line contact between the two elements when in motion	B.	surface contact between the two elements when in motion
C.	elements of pairs not -held together mechanically	D.	two elements that permit relative motion

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