Chemical Engineering Basics MCQs

Question 1

Hot & cold working of material causes its __________ deformation.

Accepted Answer

Plastic

Answer

Visco-elastic

Answer

Isotropic

Answer

Elastic

Question 2

__________ of austenite decreases the hardenability in steel.

Accepted Answer

Dissolved elements (except cobalt)

Answer

Fine grains

Answer

Coarse grains

Answer

Homogeneity

Question 3

The starting of a car takes time in winter, because the

Accepted Answer

Vaporisation of the fuel is decreased

Answer

Octane number of fuel is decreased

Answer

Fuel supply for ignition is not sufficient

Answer

Pour point of fuel decreases

Question 4

The critical pressure at which the latent heat of vaporization of steam becomes zero is __________ Kg/cm2.

Accepted Answer

225.65

Answer

273.15

Answer

100.03

Answer

373.15

Question 5

As the fluid flow rate increases, the float of the rotameter

Accepted Answer

Rises in the tube

Answer

Rotates at higher speed

Answer

Rotates at lower speed

Answer

Drops down in the tube

Question 6

The most abundant metal present in the earth's crust is;

Accepted Answer

Aluminium

Answer

Iron

Answer

Copper

Answer

Titanium

Question 7

The rolling process can not be used to produce

Accepted Answer

Tubes

Answer

Plates

Answer

Rods

Answer

Wires

Question 8

Multistage compression of air as compared to single stage compression offers the advantage of

Accepted Answer

All of the above

Answer

Power saving per unit weight of air delivered

Answer

Moisture elimination in the inter-stage cooler

Answer

Increased volumetric efficiency

Question 9

Water hammer in pipelines results, when the flowing fluid

Accepted Answer

Is suddenly brought to rest by closing a valve

Answer

Has very high velocity

Answer

Has very high pressure

Answer

Is brought to rest by gradually closing a valve