Process Equipment and Plant Design MCQs

Question 1

Cooling water fouling factors vary in the range of 0.001 to 0.003

Accepted Answer

(BTU/hr.ft 2 .°F) -1

Answer

(kcal/hr.m 2 .°C) -1

Answer

(W/m 2 .°K) -1

Answer

(kcal/hr.m.°C) -1

Question 2

The safe height (h) to diameter (d) ratio (i.e., h/d) for liquid/petro fuel storage tank of capacity more than 45 kilolitres is less than

Accepted Answer

1

Answer

2

Answer

3

Answer

3.5

Question 3

If a single tube pass heat exchanger is converted to two passes; for the same flow rate, the pressure drop per unit length in tube side will __________ times.

Accepted Answer

Increase by 2 1.6

Answer

Increase by 1.8

Answer

Decrease by 2 2

Answer

None of these

Question 4

Needle valves are generally not used for

Accepted Answer

Very large diameter pipes

Answer

High pressure throttling service

Answer

Very accurate flow control

Answer

Smaller sizes of pipe

Question 5

Lug support is meant for supporting __________ vessels.

Accepted Answer

Small

Answer

Large horizontal cylindrical

Answer

Tall but empty

Answer

Thick walled tall

Question 6

Slope of countercurrent flow rotary drier is in the range of __________ meter/metre.

Accepted Answer

0 to 0.08

Answer

0 to 0.8

Answer

0 to 1.5

Answer

0 to 2.2

Question 7

Pick out the wrong statement pertaining to shell and tube heat exchanger.

Accepted Answer

Bracket supports are used for horizontal shell, while saddle support is used for vertical shell

Answer

Clearance between shell & baffles and between tube & baffles should be minimum to avoid by-passing of the fluid, but it should be enough to permit the removal of tube bundle

Answer

Baffles are supported independently of the tubes by tie rods and positioned by spacers

Answer

Tie rods are fixed at one end in the tube sheet by making blind holes and the minimum number of tie rods is 4 with at least 10 mm diameter

Question 8

Pick out the wrong statement

Accepted Answer

Both B and C

Answer

For all the cylindrical process vessels operating above atmospheric pressure, formed heads are used for closing the vessel

Answer

Fouling factor of river water is less than that of sea water

Answer

Risers provided in bubble cap trays in the distillation column facilitate the flow of both liquid and vapor

Question 9

Diameter of rivet hole (d, mm) and the plate thickness (t, mm) are related by Unwin's formula as

Accepted Answer

d = 1.6$$\sqrt {	ext{t}} $$

Answer

d = 1.1 t

Answer

d = 1.5 t

Answer

d = 3$$\sqrt {	ext{t}} $$