Chemical Engineering Basics MCQs

Question 1

Pick out the wrong statement.

Accepted Answer

Heating of humid air is done for its dehumidification

Answer

Dry bulb temperature, wet bulb temperature & dew point are the same in case of saturated air

Answer

Dew point is reached by cooling the humid air at constant moisture content

Answer

None of these

Question 2

Color of brass changes from yellow to __________ after its dezincification which exemplifies selective leaching.

Accepted Answer

Red

Answer

Grey

Answer

Orange

Answer

Violet

Question 3

Out of the following, the materials having maximum magnetic permeability is

Accepted Answer

Silicon steel (Si = 4%)

Answer

Cast iron

Answer

Wrought iron

Answer

Mild steel

Question 4

The phenomenon occurring during explosion of a hydrogen bomb is

Accepted Answer

A combination of both nuclear fission & fusion

Answer

Nuclear fission

Answer

Nuclear fusion

Answer

None of these

Question 5

X-rays are

Accepted Answer

Neutral

Answer

Positively charged

Answer

Negatively charged

Answer

Of higher wavelength than visible light

Question 6

Minimum thermal efficiency of a steam boiler may be around __________ percent

Accepted Answer

20

Answer

25

Answer

45

Answer

65

Question 7

Optical activity is a/an __________ property.

Accepted Answer

Both A & B

Answer

Additive

Answer

Constitutive

Answer

Neither A nor B

Question 8

The most important requirement for aluminium industry is the availability of cheap

Accepted Answer

Electrical power

Answer

Ore

Answer

Labour

Answer

Abundant water

Question 9

Shampoos are commercially not available in the form of

Accepted Answer

Gaseous mixture

Answer

Powder

Answer

Solution

Answer

Emulsion