Maximum size of the raschig rings used in a packed tower is about __________ of the coloumn diameter.

Process Equipment and Plant Design
Maximum size of the raschig rings used in a packed tower is about __________ of the coloumn diameter.

1/50th

1/20th

1/10th

1/30th

1/50th

1/20th

1/10th

1/30th

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Process Equipment and Plant Design
In packed absorption tower, onset of flooding usually occurs at a pressure drop of about __________ mm of water column per metre height of packing.

25-50

750-1000

200-250

50-75

25-50

750-1000

200-250

50-75

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Process Equipment and Plant Design
An adequate clearance between the tray and the shell wall of a distillation column is provided to

Avoid back-trapping

Drain the liquid from the tray when the unit is not in operation

None of these

Allow for thermal expansion and facilitate installation

Avoid back-trapping

Drain the liquid from the tray when the unit is not in operation

None of these

Allow for thermal expansion and facilitate installation

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Process Equipment and Plant Design
Triangular pitch tube layout as compared to square pitch in a shell and tube heat exchanger

Permits the use of less tubes in a given shell diameter

Permits the use of more tubes in a given shell diameter

Facilitates comparatively easier external cleaning because of large clearance

Both B and C

Permits the use of less tubes in a given shell diameter

Permits the use of more tubes in a given shell diameter

Facilitates comparatively easier external cleaning because of large clearance

Both B and C

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Process Equipment and Plant Design
Skirt support is the most suitable for supporting __________ vessels.

Large horizontal

Tall vertical

Thick walled

Small horizontal

Large horizontal

Tall vertical

Thick walled

Small horizontal

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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

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

Providing a higher skirt clearance or a higher weir

All of these

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

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

Providing a higher skirt clearance or a higher weir

All of these

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Process Equipment and Plant Design

Process Equipment and Plant Design Maximum size of the raschig rings used in a packed tower is about __________ of the coloumn diameter.

Process Equipment and Plant Design In packed absorption tower, onset of flooding usually occurs at a pressure drop of about __________ mm of water column per metre height of packing.

Process Equipment and Plant Design An adequate clearance between the tray and the shell wall of a distillation column is provided to

Process Equipment and Plant Design Triangular pitch tube layout as compared to square pitch in a shell and tube heat exchanger

Process Equipment and Plant Design Skirt support is the most suitable for supporting __________ vessels.

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

Process Equipment and Plant Design
Maximum size of the raschig rings used in a packed tower is about __________ of the coloumn diameter.

Process Equipment and Plant Design
In packed absorption tower, onset of flooding usually occurs at a pressure drop of about __________ mm of water column per metre height of packing.

Process Equipment and Plant Design
An adequate clearance between the tray and the shell wall of a distillation column is provided to

Process Equipment and Plant Design
Triangular pitch tube layout as compared to square pitch in a shell and tube heat exchanger

Process Equipment and Plant Design
Skirt support is the most suitable for supporting __________ vessels.

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