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111.

The ability of a tool to resist softening at high temperatures is known as

112.

In 18-4-1 high speed steel the maximum percentage of any constituent is

113.

In iron-iron carbide diagram the

A.	Abscissa is time	B.	Abscissa is temperature
C.	Abscissa is carbon percentage	D.	Ordinate is time
E.	None of the above

114.

Gamma iron exists at temperatures in the range

A.	Room temperature and lower critical temperature	B.	Between 500?C and 850?C
C.	Between 900?C and 1400?C	D.	Between 1400?C and 1600?C
E.	Above 1600?C

115.

Solder is an alloy consisting of

116.

German silver is an alloy of

A.	Nickel, copper and zinc	B.	Silver, copper and niclel
C.	Silver, copper and lead	D.	Silver, gold and platinum
E.	Silver with impurities below 1%

117.

The fine grained steel

A.	Are brittle	B.	Are lighter
C.	Are doctile	D.	Have more tendency to distort
E.	None of the above

118.

The primary purpose of annealing is to

A.	Restrict the hardness of steel	B.	Soften the steel for machining after cold working
C.	Reduce carbon percentage	D.	Change the crystalline structure
E.	None of the above

119.

Carburizing is done

A.	On steel with carbon percentage of 0.7%	B.	On steels with carbon percentage of 0.5%
C.	To improve hardenability of steel	D.	By heating 200?C below critical temperature
E.	To induce soft surface for machining on a hard core

120.

Recrystallistion temperature is one

A.	At which crystals again begin to appear	B.	At which new spherical crystals first begin to form from the old deformed ones when a strained metal is heated
C.	At which crystals start growing in size	D.	At which polycrystalline changes occur
E.	At which change of allotropic form takes place.