Process Equipment and Plant Design MCQs

Question 1

Steam side heat transfer co-efficient for design consideration under ordinary condition can be assumed to be about __________ kcal/hr.m 2 .°C.

Accepted Answer

7500

Answer

1250

Answer

2500

Answer

15000

Question 2

An increase in the liquid resistance to interphase mass transfer and a resultant reduction in plate efficiency is caused by

Accepted Answer

All of the above

Answer

An increase in liquid viscosity

Answer

An increase in relatived volatility for rectification columns

Answer

Decrease in gas solubility for absorbers

Question 3

In a pressure vessel containing multiple openings of various dimensions at different parts, stress concentration at the edges of the opening is maximum which becomes negligibly small beyond the area covered by __________ times the hole diameter.

Accepted Answer

Two

Answer

Five

Answer

Ten

Answer

Twenty

Question 4

Shell side heat transfer co-efficient in case of square pitch as compared to the triangular pitch under similar condition of fluid flow and tube size is

Accepted Answer

Less

Answer

More

Answer

Same

Answer

Twice

Question 5

Pick out the wrong statement about distillation operation

Accepted Answer

Flash distillation, differential distillation & steam distillation are all continuous distillation processes

Answer

Distillation under vacuum is a substitute for steam distillation

Answer

In differential (simple) distillation, the vapour is removed as soon as it is formed without appreciable condensation

Answer

In flash (equilibrium) distillation, a definite fraction of liquid is vaporised in such a way that the evolved vapour & residual liquids are in equilibrium with each other

Question 6

The thickness of heat transfer plates used in the plate type heat exchanger ranges from __________ mm, pressed in a single piece provided with grooves & corrugations.

Accepted Answer

1.25 to 3.125

Answer

0.3 to 0.8

Answer

3.5 to 7.0

Answer

8-12

Question 7

In a __________ rivetted joint, the number of rivets decreases from the innermost row to the outermost row.

Accepted Answer

Diamond

Answer

Chain

Answer

Zig-zag

Answer

None of these

Question 8

Optimum reflux ratio in a continuous distillation column is determined by the

Accepted Answer

Total cost consideration (fixed cost of the column plus the cooling water & steam cost)

Answer

Maximum permissible vapour velocity

Answer

Flooding limit of the column

Answer

None of these

Question 9

The difficulty of liquid distribution in packed towers is accentuated, when the ratio of tower diameter to packing diameter is

Accepted Answer

< 7

Answer

< 30

Answer

> 7 < 15

Answer

> 20 < 50