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81.

Cold heading is a process of

A.	High energy rate forming	B.	Explosive forming
C.	Pneumatic mechanical forming	D.	Electro-machining process
E.	Chipless machining

82.

Hard, tough, fragile and heat sensitive metals can be processed by

A.	Cold heading	B.	Explosive forming
C.	High energy rate forming	D.	Electrical discharge machining
E.	Intraform machining

83.

Dielectric is essentially required in

84.

Sintered tungsten carbides can be machined by

85.

High rate of oscillation of tools in ultrasonic machining is produced by

86.

Chisels used for metal cutting are

A.	Hardened	B.	Annealed
C.	Hardened and tempered	D.	Annealed, hardened and tempered
E.	None of the above

87.

Chisels for metal cutting are

88.

A diamond point chisel is used for

89.

A hot chisel is one which is

A.	Red hot	B.	Used to cut red hot materials
C.	Used to cut cold materials	D.	None of these

90.

For cutting mild steel the cutting angle of a chisel should be