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71.

The holding power of sunk key is due to resistance which it offers in

72.

Which of the following key transmits power through frictional resistance only

73.

Splines are used when

A.	The power to be transmitted is high	B.	The power to be transmitted is low
C.	The torque is high	D.	rpm are high
E.	Axial relative motion between shaft and hub is necessary

74.

Splined shafts are commonly used in

75.

While designing a shaft, hub and a key, care is taken so that

A.	Shaft is the stronger component	B.	Hub is the strongest component
C.	Key is the strongest component	D.	Key is the weakest component
E.	Shaft is the weakest component

76.

Key normally used in wrist watch is

77.

Iniversal coupling is

A.	Used for collinear shafts	B.	Rigid coupling
C.	Type of flange coupling	D.	Used for non-collinear shafts
E.	None of the above

78.

A flange coupling is

A.	Used for non-collinear shafts	B.	Used for collinear shafts
C.	Flexible	D.	Used only on small shafts rotating at slow speeds
E.	None of the above

79.

In flange coupling the weakest element should be

80.

A muff type coupling

A.	Is a simple type rigid coupling	B.	Is a simple type of flexible coupling
C.	Is used for coplanar shafts	D.	Is used for non-coplanar shafts
E.	Non of the above