At equal mass velocities, the values of film co-efficients for gases as compared to that for liquids are generally.

Process Equipment and Plant Design
At equal mass velocities, the values of film co-efficients for gases as compared to that for liquids are generally.

Unpredictable

Same

Lower

Higher

Unpredictable

Same

Lower

Higher

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Process Equipment and Plant Design
Weep holes provided in the plates of a distillation column

All of these

Are normally located near the overflow weir so that any delivery of liquid during operation follows approximately the same path as the overflow fluid

Facilitate draining out liquid from a tray when the unit is not in operation

Must be large enough (usually 1/4" to 5/8" dia) to prevent plugging but should not deliver excessive amount of fluid during operation

All of these

Are normally located near the overflow weir so that any delivery of liquid during operation follows approximately the same path as the overflow fluid

Facilitate draining out liquid from a tray when the unit is not in operation

Must be large enough (usually 1/4" to 5/8" dia) to prevent plugging but should not deliver excessive amount of fluid during operation

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Process Equipment and Plant Design
Where does the maximum tensile strength occur in a thick cylindrical vessel subjected to internal pressure?

None of these

At the mid thickness of the cylindrical wall

At the outer surface

At the inner surface

None of these

At the mid thickness of the cylindrical wall

At the outer surface

At the inner surface

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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

All of these

Providing a higher skirt clearance or a higher weir

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

All of these

Providing a higher skirt clearance or a higher weir

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Process Equipment and Plant Design
Cylindrical storage tanks used for the storage of volatile liquids (e.g., naphtha) have __________ roofs.

Fixed

Conical

Flat

Floating

Fixed

Conical

Flat

Floating

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Process Equipment and Plant Design
The difficulty of liquid distribution in packed towers is accentuated, when the ratio of tower diameter to packing diameter is

< 30

> 20 < 50

< 7

> 7 < 15

< 30

> 20 < 50

< 7

> 7 < 15

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Process Equipment and Plant Design

Process Equipment and Plant Design At equal mass velocities, the values of film co-efficients for gases as compared to that for liquids are generally.

Process Equipment and Plant Design Weep holes provided in the plates of a distillation column

Process Equipment and Plant Design Where does the maximum tensile strength occur in a thick cylindrical vessel subjected to internal pressure?

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

Process Equipment and Plant Design Cylindrical storage tanks used for the storage of volatile liquids (e.g., naphtha) have __________ roofs.

Process Equipment and Plant Design The difficulty of liquid distribution in packed towers is accentuated, when the ratio of tower diameter to packing diameter is

Process Equipment and Plant Design
At equal mass velocities, the values of film co-efficients for gases as compared to that for liquids are generally.

Process Equipment and Plant Design
Weep holes provided in the plates of a distillation column

Process Equipment and Plant Design
Where does the maximum tensile strength occur in a thick cylindrical vessel subjected to internal pressure?

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

Process Equipment and Plant Design
Cylindrical storage tanks used for the storage of volatile liquids (e.g., naphtha) have __________ roofs.

Process Equipment and Plant Design
The difficulty of liquid distribution in packed towers is accentuated, when the ratio of tower diameter to packing diameter is