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81.

Dies for drawing are generally made of

82.

Which one is different from the other in press work?

83.

The operation of cutting out flat areas to some desired shape and which is generally the first step in a series of operations is known as

84.

In press work the dies which combine two or more operations at one station are known as

85.

When metal is deformed by cold work, severe stresses known as residual stresses are undesirable and to remove them

A.	The metal should be stressed in reverse direction	B.	The metal should be painted
C.	The metal should be reheated below recrystallization temperature	D.	The metal should be reheated above recrystallization temperature
E.	None of the above

86.

Shot peening

A.	Improves fatigue life of small parts	B.	Causes metal surface to be in tension and the layer beneath in compression
C.	Changes the crystalline structure of material	D.	Refines the grain structure
E.	Is done at recrystallization temperature

87.

In cold working of metals

A.	Close dimensional tolerance cannot be maintained	B.	Poor surface finish is obtained
C.	Recrystallization temperature for steel is reduced	D.	Grain structure remains unchanged
E.	Strength and hardness of steel is increased

88.

The surface hardness that can be obtained by nitriding is generally in the range

A.	1000 to 1100 VPN	B.	600 to 800 VPN
C.	400 to 600 VPN	D.	Below 400 VPN

89.

Spot the process which is different from others?

90.

Spot the process which is different from others?

A.	Hot rolling	B.	Forging
C.	Cold heading	D.	Drop forging