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181.

Inconel is an alloy containing

182.

Sorbite' is obtained when

A.	Quenching steel during transformation	B.	Steel is annealed
C.	A fully hardened steel is finally 'drawn' at about 677?C	D.	None of the above

183.

Bush bearings is

184.

A Babitt is

A.	A cutectic of iron and iron phosphide	B.	A gadget for measuring volume
C.	Antimony bearing lead or tin alloy	D.	A measure of magnetic induction produced in a material
E.	None of these

185.

Lime stone acts as a flux in a cupola. It is generally added in the proportion

A.	10 kg of limestone per tonne of iron	B.	30 kg of limestone per tonner of iron
C.	100 kg of limestone per tonne of iron	D.	500 kg of limestone per tonne of coke
E.	One tonne of limestone per tonne of charge

186.

A bot in cupola is

187.

Steel balls for ball bearings are generally made of

188.

The hardness of steel depends on

A.	Heating temperature before quenching	B.	Amount of carbon it contains
C.	The shape and distribution of carbides in iron	D.	Percentage of alloying elements
E.	Basic process from which it is produced

189.

The cast iron has

A.	High ductility	B.	High malleability
C.	High tensile strength	D.	Elastic limit close to ultimate breaking strength
E.	None of the above

190.

Machining properties of steel are improved by adding