Liquid gradient over a tray can be minimised by

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

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

Providing a higher skirt clearance or a higher weir

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

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

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 wall thickness of thin cylindrical shell with hemispherical ends is __________ that of the spherical ends.

Less than

Equal to

More than

Either B or C; depends on maximum permissible internal pressure

Less than

Equal to

More than

Either B or C; depends on maximum permissible internal pressure

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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

Allow for thermal expansion and facilitate installation

Avoid back-trapping

None of these

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

Allow for thermal expansion and facilitate installation

Avoid back-trapping

None of these

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

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Process Equipment and Plant Design
In a cylinderical vessel subjected to internal pressure, the longitudinal stress σL and the circumferential stress, σh are related by

No relation exists

σh = σL

σh = 2 σL

σh = σL/2

No relation exists

σh = σL

σh = 2 σL

σh = σL/2

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Process Equipment and Plant Design
Which of the following is the best tube material from thermal conductivity point of view alone?

Copper

Stainless steel

Aluminium

Carbon steel

Copper

Stainless steel

Aluminium

Carbon steel

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Process Equipment and Plant Design
Pick out the wrong statement pertaining to the design of a long tube vertical evaporator.

Liquor level is maintained at l/3rd to 1/2 of the height of the tube

Steam is fed to the shell, whereas the liquor is filled inside the tube

None of these

Tube dia is 3-6 cms, while tube length in 3-6 metres

Liquor level is maintained at l/3rd to 1/2 of the height of the tube

Steam is fed to the shell, whereas the liquor is filled inside the tube

None of these

Tube dia is 3-6 cms, while tube length in 3-6 metres

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Process Equipment and Plant Design

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

Process Equipment and Plant Design The wall thickness of thin cylindrical shell with hemispherical ends is __________ that of the spherical ends.

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 In a cylinderical vessel subjected to internal pressure, the longitudinal stress σL and the circumferential stress, σh are related by

Process Equipment and Plant Design Which of the following is the best tube material from thermal conductivity point of view alone?

Process Equipment and Plant Design Pick out the wrong statement pertaining to the design of a long tube vertical evaporator.

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

Process Equipment and Plant Design
The wall thickness of thin cylindrical shell with hemispherical ends is __________ that of the spherical ends.

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
In a cylinderical vessel subjected to internal pressure, the longitudinal stress σL and the circumferential stress, σh are related by

Process Equipment and Plant Design
Which of the following is the best tube material from thermal conductivity point of view alone?

Process Equipment and Plant Design
Pick out the wrong statement pertaining to the design of a long tube vertical evaporator.