Process Equipment and Plant Design MCQs

Question 1

If 'D' is the inside diameter of the shell of a shell and tube heat exchanger, then the baffle spacing is usually in the range of

Accepted Answer

D/5 or minimum 2" to 5D

Answer

D/2 or minimum 2" to 5D

Answer

D/5 or minimum 2" to D

Answer

None of these

Question 2

Cylindrical pressure vessels in horizontal condition is generally supported on a __________ support.

Accepted Answer

Saddle

Answer

Lug

Answer

Skirt

Answer

Guy wire

Question 3

In a shell and tube heat exchanger for a given heat transfer surface area, smaller diameter tubes are favoured as compared to larger diameter ones ; because the smaller diameter tubes

Accepted Answer

Can be fitted into a smaller shell diameter hence the cost of the heat exchanger would be less

Answer

Are easier to clean

Answer

Are less prone to fouling

Answer

None of these

Question 4

Flanges are connected to pipes by

Accepted Answer

All of the above

Answer

Screwing

Answer

Welding

Answer

Brazing

Question 5

Generally, as the length of the liquid path on a tray is increased beyond 5 ft, the overall column efficiency

Accepted Answer

Increases

Answer

Decreases

Answer

Remains same

Answer

May increase or decrease depending upon the plate spacing

Question 6

In a shell and tube heat exchanger, the clearance of the tube is generally

Accepted Answer

Not less than one-fourth of the tube diameter or $${\frac{3}{{16}}^{''}}$$

Answer

More than the tube diameter

Answer

Equal to the tube diameter

Answer

More in case of triangular pitch as compared to the square pitch tube layout

Question 7

The LMTD correction factor (F T ) is applied in __________ heat exchangers.

Accepted Answer

All multipass

Answer

1-1 cocurrent

Answer

Double pipe

Answer

All of the above

Question 8

Vapor velocity in a distillation column for non-foaming mixture is in the range of __________ times the flooding velocity.

Accepted Answer

0.6 to 0.7

Answer

0.1 to 0.3

Answer

0.85 to 0.95

Answer

1.5 to 2

Question 9

Pick out the correct statement.

Accepted Answer

Packed towers are generally preferred over plate towers, if the liquids have a foaming tendency

Answer

When highly corrosive fluids are to be handled, the plate towers prove to be cheaper and easier to construct than packed tower

Answer

The pressure drop through the packed towers is generally more than the pressure drop through plate towers designed for same duty

Answer

None of these