Chemical Engineering - Chemical Engineering Basics

36. 

Dielectric

A. is an electrical insulating material.
B. of low resistivity is preferred.
C. should have high thermal conductivity.
D. need not defy the corrosive action of chemicals.

Answer: Option A

Explanation:

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37. 

Normalising of an object does not

A. refine coarse grain structure obtained during hot working.
B. improve ductility.
C. improve yield strength.
D. improve machanical properties.

Answer: Option B

Explanation:

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38. 

Plasma is

A. a high temperature neutral gas.
B. nothing but ionised gas.
C. a source of steady and highest controllable pressure.
D. formed at very low temperature.

Answer: Option B

Explanation:

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39. 

The machanism involved in the removal of metal in drilling operation is by

A. compression
B. extrusion
C. shearing
D. both 'b' & 'c'

Answer: Option D

Explanation:

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40. 

Thermal conductivity of a material does not depend upon its

A. mass
B. volume
C. surface area
D. all 'a', 'b' & 'c'

Answer: Option D

Explanation:

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