Chemical Engineering Basics MCQs

Question 1

Heat treatment of steel is done mainly to change its

Accepted Answer

Mechanical properties

Answer

Physical properties

Answer

Chemical composition

Answer

All of the above

Question 2

Fire on fuel oil lines can be extinguished by

Accepted Answer

Foam

Answer

Steam

Answer

Water

Answer

Carbon dioxide

Question 3

__________ property of steel increases by addition of large amount of silicon in it.

Accepted Answer

Magnetic

Answer

Mechanical

Answer

Machining

Answer

Refractory

Question 4

LASER

Accepted Answer

Stands for Light Amplification by Stimulated Emission of Radiation

Answer

Has the same intensity as visible light

Answer

Can't be used for cutting metals

Answer

None of these

Question 5

Laser is a device to produce

Accepted Answer

A beam of coherent light

Answer

Gamma rays

Answer

Microwaves

Answer

A beam of white light

Question 6

Corona discharge is related to the operation of a/an

Accepted Answer

Electrostatic precipitator

Answer

Induction motor

Answer

Fast breeder reactor

Answer

Magneto hydrodynamic generator (MHD)

Question 7

Thermal equivalent of electrical power in practical calculation is __________ kcal/kWh.

Accepted Answer

3000

Answer

746

Answer

1000

Answer

550

Question 8

Upto the critical radius of insulation, added insulation, will

Accepted Answer

Decrease heat loss and will have no effect beyond that

Answer

Increase the heat loss

Answer

Decrease heat flux

Answer

Reduce convection heat loss compared to conduction heat less

Question 9

For grinding of softer materials, the grinding wheel should have __________ grain size.

Accepted Answer

Coarser

Answer

Finer

Answer

Medium

Answer

Any type of