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161.

Crystal structure of a material is generally examined by

A.	Naked eye	B.	Microscope
C.	Optical microscope	D.	X-rays and electron diffraction
E.	Spectroscope techniques

162.

Ferromagnetic alpha iron change to paramagnetic alpha iron at

163.

Which one of the following is usually most ductile?

A.	Hexagonal close packed lattice	B.	Body centred cubic lattice
C.	Face centred cubic lattic	D.	Combination of (A) and (C) above
E.	None of the above

164.

The blast furnace uses the following as fuel:

165.

For better fuuidity of the molten metal, the following is added in blast furnace

166.

The product of blast furnace is known as

167.

Micro-structure of a material is generally examined by

A.	Naked eye	B.	Microscope
C.	Optical microscope	D.	X-rays and electron diffraction
E.	Spectroscope techniques

168.

A bearing alloy should have

A.	Capacity to withstand shocks and vibrations	B.	Low coefficient of friction
C.	High compressive strength	D.	High resistance to corrosion
E.	All above

169.

A lead based bearing alloy contains

170.

Constantan is an alloy of