Chemical Engineering MCQs with explanations

Question 1

A particle is settling in a liquid under Stokesian conditions. The free falling velocity of the particle is proportional to________?

Accepted Answer

√(Particle diameter)

Question 2

Critical velocity in a pipe flow________?

Accepted Answer

Increases as pipe diameter increases

Question 3

Straight run naphtha is converted into high octane number petrol (gasoline) by catalytic________?

Accepted Answer

Reforming

Question 4

From Arrhenius law, a plot of loge K versus 1/T gives a straight line with a slope of (-E/R). The unit of E/R is________?

Accepted Answer

°K

Question 5

Angled baffles are preferred in the agitation tank to control the swirling action; if the viscosity of the liquid to be mixed is about 200 poise. However, the baffle may be completely eliminated for mixing liquids having viscosity above ________ poise?

Accepted Answer

600

Question 6

The most stable allotropic form of phosphorous is the ________ phosphorous?

Accepted Answer

Black

Question 7

Resistance to fusion of the refractory under a steady rising temperature condition is called ________?

Accepted Answer

Refractoriness

Question 8

In a shell and tube heat exchanger having triangular pitch, the shell side equivalent diameter is given by________?

Accepted Answer

4(0.86P2 – πd2/4)/πd

Question 9

For estimation of heat capacity of a solid compound, one can use________?

Accepted Answer

Kopp’s rule

Question 10

Corresponding to Prandtl number in heat transfer, the dimensionless group in mass transfer is the ________ number?

Accepted Answer

Schmidt

Chemical Engineering MCQs with Explanations