Chemical Engineering Basics MCQs

Question 1

Which of the following is the most elastic material?

Accepted Answer

Steel

Answer

Plastic

Answer

Glass

Answer

Rubber

Question 2

What is the pH of distilled water?

Accepted Answer

7

Answer

0

Answer

1

Answer

14

Question 3

When dry bulb temperature & wet bulb temperature of moist air is the same, it means that the

Accepted Answer

Air is fully saturated

Answer

Partial pressure of water vapour is less than the total pressure

Answer

Humidity is < 100% & dew point temperature of air has not reached

Answer

Dew point temperature of air has not reached & air is not saturated fully

Question 4

When dry bulb temperature & wet bulb temperature of moist air is the same, it means that the

Accepted Answer

Air is fully saturated

Answer

Partial pressure of water vapour is less than the total pressure

Answer

Humidity is < 100% & dew point temperature of air has not reached

Answer

Dew point temperature of air has not reached & air is not saturated fully

Question 5

Oxygen content below __________ percent in air contaminated with nitrogen does not support combustion and is unsafe for humane exposure.

Accepted Answer

16

Answer

18

Answer

14

Answer

12

Question 6

A pycnometer is used for the measurement of

Accepted Answer

Specific gravity of a liquid

Answer

Flow rate of molten metal

Answer

Composition of alloys

Answer

Concentration of a solution

Question 7

Filler metal is used in __________ welding.

Accepted Answer

Braze

Answer

Electric spot

Answer

Projection

Answer

Seam

Question 8

A colloidal system, in which a liquid is dispersed in gas is called a/an

Accepted Answer

Aerosol

Answer

Gel

Answer

Foam

Answer

Emulsion

Question 9

Disposable patterns are made of

Accepted Answer

Polystyrene

Answer

Metal

Answer

Rubber

Answer

Wood