Chemical Engineering Basics MCQs

Question 1

A solar cell converts the sunlight directly into __________ energy.

Accepted Answer

Electrical

Answer

Thermal

Answer

Mechanical

Answer

Chemical

Question 2

Mho's scale of hardness, which consists of 10 standard minerals is used for the measurement of __________ hardness.

Accepted Answer

Scratch

Answer

Indentation

Answer

Dynamic

Answer

Rebound

Question 3

In case of fluid moving machineries, the relationship between saturation temperature and pressure decides the process of

Accepted Answer

Cavitation

Answer

Water hammer

Answer

Flow separation

Answer

Turbulent mixing

Question 4

Pressure gauges are never connected directly to the live steam line; rather a loop or syphon is interposed as close as possible to the pressure gauge. This is done to

Accepted Answer

Both 'A' & 'B'

Answer

Avoid the overheating of the tubes & bellows which operate them to minimise error and damage

Answer

Form a seal of water by steam condensate to fill the tube or bellows at the pressure being measured

Answer

Avoid the static head error introduced by steam entry

Question 5

Which of the following materials has the poorest electrical conductivity?

Accepted Answer

Carbon

Answer

Aluminium

Answer

Silver

Answer

Stainless steel

Question 6

Material having maximum density is

Accepted Answer

Osmium

Answer

Plutonium

Answer

Titanium

Answer

Uranium

Question 7

Boiling temperature of carbon dioxide at atmospheric pressure is __________ °C.

Accepted Answer

-78.5

Answer

-30.5

Answer

-183.5

Answer

-10.5

Question 8

Silicon percentage in the silicon steel used for electrical appliances/equipments is

Accepted Answer

3-4

Answer

0.3-0.4

Answer

12-14

Answer

20-25

Question 9

Silicon percentage in the silicon steel used for electrical appliances/equipments is

Accepted Answer

3-4

Answer

0.3-0.4

Answer

12-14

Answer

20-25