Which of the following factors determine the amount of entrainment in a distillation column?

Process Equipment and Plant Design
Which of the following factors determine the amount of entrainment in a distillation column?

Depth of liquid above the bubble cap slots

All of these

Vapour velocity in the volume between the plates

Plate spacing

Depth of liquid above the bubble cap slots

All of these

Vapour velocity in the volume between the plates

Plate spacing

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Process Equipment and Plant Design
The minimum tray spacing in distillation column of diameter less than 3 ft is normally __________ inches.

18

6

34

24

18

6

34

24

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Process Equipment and Plant Design
In a shell and tube heat exchanger, tube side __________ of the mass velocity.

Heat transfer co-efficient is proportional to 0.8th power

Pressure drop is proportional to the square

Neither A nor B

Both A & B

Heat transfer co-efficient is proportional to 0.8th power

Pressure drop is proportional to the square

Neither A nor B

Both A & B

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Process Equipment and Plant Design
Which of the following is not a valid assumption in continuous binary distillation for calculating the number of equilibrium stages by Mc-Cabe-Thiele's method?

Molar latent heat of the two components are equal

Sensible heat changes for vapour & liquid are negligibly small

Reflux is not a saturated liquid

Heat of mixing of normal liquid is assumed to be zero

Molar latent heat of the two components are equal

Sensible heat changes for vapour & liquid are negligibly small

Reflux is not a saturated liquid

Heat of mixing of normal liquid is assumed to be zero

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Process Equipment and Plant Design
Pick out the wrong statement about the design of a sieve plate column.

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

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

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

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

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

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

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

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

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Process Equipment and Plant Design
For annular flow of a fluid, the ratio of the equivalent diameter for pressure drop calculation to the equivalent diameter for heat transfer calculation is

D2/(d1 + d2)

(d1 + d2)/d1

(d1 + d2)/d2

D1/(d1 + d2)

D2/(d1 + d2)

(d1 + d2)/d1

(d1 + d2)/d2

D1/(d1 + d2)

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Process Equipment and Plant Design

Process Equipment and Plant Design Which of the following factors determine the amount of entrainment in a distillation column?

Process Equipment and Plant Design The minimum tray spacing in distillation column of diameter less than 3 ft is normally __________ inches.

Process Equipment and Plant Design In a shell and tube heat exchanger, tube side __________ of the mass velocity.

Process Equipment and Plant Design Which of the following is not a valid assumption in continuous binary distillation for calculating the number of equilibrium stages by Mc-Cabe-Thiele's method?

Process Equipment and Plant Design Pick out the wrong statement about the design of a sieve plate column.

Process Equipment and Plant Design For annular flow of a fluid, the ratio of the equivalent diameter for pressure drop calculation to the equivalent diameter for heat transfer calculation is

Process Equipment and Plant Design
Which of the following factors determine the amount of entrainment in a distillation column?

Process Equipment and Plant Design
The minimum tray spacing in distillation column of diameter less than 3 ft is normally __________ inches.

Process Equipment and Plant Design
In a shell and tube heat exchanger, tube side __________ of the mass velocity.

Process Equipment and Plant Design
Which of the following is not a valid assumption in continuous binary distillation for calculating the number of equilibrium stages by Mc-Cabe-Thiele's method?

Process Equipment and Plant Design
Pick out the wrong statement about the design of a sieve plate column.

Process Equipment and Plant Design
For annular flow of a fluid, the ratio of the equivalent diameter for pressure drop calculation to the equivalent diameter for heat transfer calculation is