Process Equipment and Plant Design MCQs

Question 1

What is the slope of the operating line in the rectifying section of a distillation coloumn?

Accepted Answer

<1

Answer

0

Answer

∞

Answer

> 1

Question 2

Wall thickness of schedule 40 pipe as compared to that of schedule 80 pipe is

Accepted Answer

Less

Answer

More

Answer

Same

Answer

Cither A or B; depends upon the I.D. of the pipe

Question 3

In a multipass shell and tube heat exchanger, the shell side cross flow area does not depend upon

Accepted Answer

None of these

Answer

Baffle spacing

Answer

Clearance

Answer

Pitch

Question 4

In inclined long tube vertical evaporators, the tubes are inclined at an angle of

Accepted Answer

45°

Answer

15°

Answer

90°

Answer

60°

Question 5

In a distillation column, bubble caps are located on trays with a pitch of __________ times the outside diameter of the caps.

Accepted Answer

1.3 to 2

Answer

1.6 to 2

Answer

2.5

Answer

1.5 to 3

Question 6

Pick out the wrong statement about the design of a sieve plate column.

Accepted Answer

Minimum recommended downcomer residence time for the disengagement of entrained vapour is the same for both foaming and non-foaming liquids, which is about 20 seconds

Answer

An increased weir height improves the tray efficiency at the cost of high plate pressure drop; optimum wear height being 40-90 mm for column pressure above atmospheric and 6-12 mm for vacuum columns

Answer

For segmental downcomers, the chord length is 60-80% of the column diameter. An initial value of downcomer area of 12% is taken in the design

Answer

Width of the calming section provided at the inlet and outlet sides of the plate is 75 mm for column diameter below 1.5 metres and 100 mm for larger diameter columns

Question 7

Pressure drop (Δp) and the superficial gas mass velocity (G) in case of packed absorption tower operating in the preloading range are related as

Accepted Answer

Δp = G 2

Answer

Δp = G

Answer

Δp = G 0.5

Answer

Δp = $$\frac{1}{{{{	ext{G}}^{0.6}}}}$$

Question 8

The ratio of linear stress to linear strain is termed as the

Accepted Answer

Modulus of elasticity

Answer

Modulus of rigidity

Answer

Bulk modulus

Answer

None of these

Question 9

Oxygen carrying pipelines in chemical industries are coloured with __________ colour.

Accepted Answer

Blue

Answer

Yellow

Answer

Black

Answer

Red