The average velocity in the tubes of a 1-4 heat exchanger is __________ times that in 1-1 heat exchanger having the same size & number of tubes and operated at same liquid flow rate.

Process Equipment and Plant Design
The average velocity in the tubes of a 1-4 heat exchanger is __________ times that in 1-1 heat exchanger having the same size & number of tubes and operated at same liquid flow rate.

43832

4

43834

2

43832

4

43834

2

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Process Equipment and Plant Design
Hole diameter of the seive trays in the distillation column ranges from __________ mm.

12.5 to 18.5

L to 3

3 to 12.5

4 to 8

12.5 to 18.5

L to 3

3 to 12.5

4 to 8

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Process Equipment and Plant Design
Le/D for fully open gate valves would be

Both B and C

Around 7

Much more than that for fully open globe valves

Much less (say 2% than that for fully open globe valves)

Both B and C

Around 7

Much more than that for fully open globe valves

Much less (say 2% than that for fully open globe valves)

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Process Equipment and Plant Design
Liquid gradient over a tray can be minimised by

Decreasing the number of rows of caps through which the liquid flows or by decreasing the velocity of liquid flow past the caps or by reducing the distance along the tray through which the liquid must

All of these

Providing a higher skirt clearance or a higher weir

Using split flow, radial flow or cascade flow for column diameter large than 4 ft

Decreasing the number of rows of caps through which the liquid flows or by decreasing the velocity of liquid flow past the caps or by reducing the distance along the tray through which the liquid must

All of these

Providing a higher skirt clearance or a higher weir

Using split flow, radial flow or cascade flow for column diameter large than 4 ft

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Process Equipment and Plant Design
The length of straight rectangular weir used on cross-flow trays is generally __________ the column diameter.

2 ft irrespective of (for column > 3 ft diameter)

0.6-0.8 times

Twice

Equal to

2 ft irrespective of (for column > 3 ft diameter)

0.6-0.8 times

Twice

Equal to

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Process Equipment and Plant Design
A high vapour velocity is required for high plate efficiency in a seive plate coloumn. The satisfactory value of operating vapor velocity for design purpose in seive plate column is about __________ percent of the flooding velocity.

60

45

95

80

60

45

95

80

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Process Equipment and Plant Design

Process Equipment and Plant Design The average velocity in the tubes of a 1-4 heat exchanger is __________ times that in 1-1 heat exchanger having the same size & number of tubes and operated at same liquid flow rate.

Process Equipment and Plant Design Hole diameter of the seive trays in the distillation column ranges from __________ mm.

Process Equipment and Plant Design Le/D for fully open gate valves would be

Process Equipment and Plant Design Liquid gradient over a tray can be minimised by

Process Equipment and Plant Design The length of straight rectangular weir used on cross-flow trays is generally __________ the column diameter.

Process Equipment and Plant Design A high vapour velocity is required for high plate efficiency in a seive plate coloumn. The satisfactory value of operating vapor velocity for design purpose in seive plate column is about __________ percent of the flooding velocity.

Process Equipment and Plant Design
The average velocity in the tubes of a 1-4 heat exchanger is __________ times that in 1-1 heat exchanger having the same size & number of tubes and operated at same liquid flow rate.

Process Equipment and Plant Design
Hole diameter of the seive trays in the distillation column ranges from __________ mm.

Process Equipment and Plant Design
Le/D for fully open gate valves would be

Process Equipment and Plant Design
Liquid gradient over a tray can be minimised by

Process Equipment and Plant Design
The length of straight rectangular weir used on cross-flow trays is generally __________ the column diameter.

Process Equipment and Plant Design
A high vapour velocity is required for high plate efficiency in a seive plate coloumn. The satisfactory value of operating vapor velocity for design purpose in seive plate column is about __________ percent of the flooding velocity.