Chemical Engineering Basics MCQs

Question 1

Phosphorous is added to copper melt to

Accepted Answer

Remove hydrogen

Answer

Deoxidise the metal

Answer

Improve fluidity

Answer

Reduce shrinkage

Question 2

Heating of ferromagnetic materials to a temperature above Curie temperature makes it

Accepted Answer

Behave like paramagnetic materials

Answer

Insulator for heat & electricity transmission

Answer

Ferritic

Answer

Superconductor

Question 3

Particle nature of cathode rays is proved due to the fact that they

Accepted Answer

Get deflected by magnetic electric field

Answer

Travel in a straight line

Answer

Produce fluorescence

Answer

Heat the exposed material

Question 4

Pick out the correct statement

Accepted Answer

Rocket engines carry oxygen required for the combustion in the form of oxidiser

Answer

Jet engine can work, where there is no atmosphere

Answer

Rocket engines cannot work, where there is no atmosphere

Answer

Jet engines also carry oxidiser

Question 5

Which of the following is not the function of a volute casing provided in a centrifugal pump?

Accepted Answer

To increase the pump discharge rate

Answer

To reduce the head loss in discharge

Answer

To increase the pump efficiency

Answer

To collect liquid from the periphery of the impeller and to transmit it to the delivery pipe at constant velocity

Question 6

'Cryogenics' is concerned with the generation & use of low temperature in the range of

Accepted Answer

0°K to 123°K

Answer

0°C to - 123°C

Answer

0°C to - 273°C

Answer

0°K to 273°K

Question 7

Which of the following is not an ore of copper?

Accepted Answer

Cryolite

Answer

Azurite

Answer

Chalcopyrite

Answer

Malachite

Question 8

During solid state sintering of powders, the following mechanism can be active.

Accepted Answer

Solid state diffusion processes

Answer

Evaporation and condensation

Answer

Liquid formation in grain boundaries

Answer

Creation of more dislocations

Question 9

Draught produced by a tall chimney due to density difference between hot flue gas inside the Chimney and atmospheric air outside the chimney is more appropriately known as the __________ draught.

Accepted Answer

Natural

Answer

Induced

Answer

Forced

Answer

Chimney