Chemical Engineering Basics MCQs

Question 1

In continuous casting of liquid steel, the mould is made of

Accepted Answer

Water cooled copper

Answer

Water cooled steel

Answer

Refractory oxide

Answer

Silicon carbide

Question 2

The surface tension of a liquid, at critical temperature is

Accepted Answer

Zero

Answer

Indeterminate

Answer

Infinity

Answer

Same as that at any other temperature

Question 3

Identify the false statement

Accepted Answer

Martensitic steels are less susceptible to pitting corrosion than austenitic steels

Answer

Pitting corrosion is usually very localised

Answer

Hydrogen embrittlement is facilitated by tensile stress

Answer

Stress corrosion cracking is facilitated by tensile stress

Question 4

Fatigue life is expected to increase by

Accepted Answer

Having compressive residual stresses at the surface

Answer

Increasing the size of the sample

Answer

Smooth polishing of the surface of the sample

Answer

Having tensile residual stresses at the surface

Question 5

'Amortization' in respect of financial obligation of a company means the

Accepted Answer

Liquidation of financial obligations on instalment basis

Answer

Commitment of financial obligation on priority

Answer

Liquidation of all the obsolete equipments of the company

Answer

Modernisation of the plant equipments

Question 6

The refrigerant freon-12 is chemically

Accepted Answer

CCl2F2

Answer

CCl3F

Answer

CClF3

Answer

CCl4F

Question 7

Welded joint is superior to revetted joint in respect of ease of fabrication, weight and strength. Which of the following joints is the most suitable for pipes carrying fluids under high pressure and temperature?

Accepted Answer

Expansion joint

Answer

Flanged joint

Answer

Bell and spigot joint

Answer

None of these

Question 8

Commonly employed coolant for high pressure turbogenerator is

Accepted Answer

Hydrogen

Answer

Air

Answer

Carbon dioxide

Answer

Water

Question 9

The lightest non-inflammable gas is

Accepted Answer

He

Answer

H2

Answer

Ar

Answer

O2