Chemical Engineering Basics MCQs

Question 1

An atom bomb works on the principle of

Accepted Answer

Nuclear fission

Answer

Nuclear fusion

Answer

Both the nuclear fission & fusion

Answer

Ionisation

Question 2

Damage to metal surface by mechanical action is called

Accepted Answer

Erosion

Answer

Pitting

Answer

Corrosion

Answer

None of these

Question 3

Screws are specified by their __________ diameters.

Accepted Answer

Major

Answer

Minor

Answer

Pitch

Answer

None of these

Question 4

The following is a typical anionic collector used in flotation.

Accepted Answer

Potassium ethyl xanthate

Answer

Ethyl dixanthogen

Answer

Trimethyl cetyl ammonium bromide

Answer

LAuryl amine hydrochloride

Question 5

With increase in compression ratio, the volumetric efficiency of air compressor

Accepted Answer

Increases

Answer

Decreases

Answer

Remains same

Answer

May increase or decrease (depends on the suction pressure)

Question 6

The thickness of oxide film is y at time t. If K1, K2 and K3 are the temperature dependent constants, the parabolic law of oxidation is given by

Accepted Answer

y2 = 2K1t + K2

Answer

y = K1 ln (K2t + K3)

Answer

y = K1t + K2

Answer

y = K1t3 + K2

Question 7

What is the range of tempering temperature (°C) for most of the materials ?

Accepted Answer

200-300

Answer

75-100

Answer

350-450

Answer

500-600

Question 8

Streaklines, streamlines & pathlines are almost identical for __________ fluid flow.

Accepted Answer

Steady

Answer

Ideal

Answer

Uniform

Answer

None of these

Question 9

__________ number determines whether the fluid flow in an open channel is supercritical, critical or sub-critical.

Accepted Answer

Froude

Answer

Mach

Answer

Reynolds

Answer

Weber