A certain pressure vessel manufacturer avoids doing reinforcements calculations for openings by always providing a reinforcing pad extending upto double the diameter of the opening and of the same material and thickness as that of the shell wall. If area compensation is accepted as a code guideline, his approach leads to safe design

Process Equipment and Plant Design
A certain pressure vessel manufacturer avoids doing reinforcements calculations for openings by always providing a reinforcing pad extending upto double the diameter of the opening and of the same material and thickness as that of the shell wall. If area compensation is accepted as a code guideline, his approach leads to safe design

Only if the opening is on a vertical cylinderical vessel

Only if the opening is on a horizontal cylinderical vessel

Irrespective of the shape of the vessel

Only if the opening is on spherical vessel

Only if the opening is on a vertical cylinderical vessel

Only if the opening is on a horizontal cylinderical vessel

Irrespective of the shape of the vessel

Only if the opening is on spherical vessel

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Process Equipment and Plant Design
In actual operation of a bubble cap distillation tower, the __________ at the bottom of the tower is more than that at the top of the tower.

Molal flow rate of vapour

Pressure and temperature

All of these

Vapour molecular weight

Molal flow rate of vapour

Pressure and temperature

All of these

Vapour molecular weight

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Process Equipment and Plant Design
A forced circulation long tube vertical evaporator as compared to the natural circulation evaporator

Both B & C

Employs high velocity, high heat transfer rate and less heating surface requirement

Employs a centrifugal pump placed between external downtake from vapor drum and inlet to tube bundle

Is economical in operation

Both B & C

Employs high velocity, high heat transfer rate and less heating surface requirement

Employs a centrifugal pump placed between external downtake from vapor drum and inlet to tube bundle

Is economical in operation

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Process Equipment and Plant Design
In actual operation of distillation column, the vapour is not distributed uniformly among the bubble caps, primarily because of the

Liquid gradient on the tray

Lower static submergence

Small downcomer liquid seal

Lower skirt clearance

Liquid gradient on the tray

Lower static submergence

Small downcomer liquid seal

Lower skirt clearance

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Process Equipment and Plant Design
Low pressure steam (with saturation temperature between 105 to 120°C) is usually used in the vacuum evaporators, which normally employ a vacuum of about __________ mm Hg (referred to a 760 mm mercury barometer).

250

450

750

650

250

450

750

650

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Process Equipment and Plant Design
Pick out the wrong statement about the design of seive plate column and the bubble cap column.

Weir height for a bubble cap plate column is the same as that for a seive plate column

Weir height in case of a bubble cap plate ranges from 50 to 150 mm and is higher than the seive plate

The downcomer design and the residence time in the downcomer is almost same for seive plate and bubble cap columns

Weir length for a bubble cap plate is the same as that for the seive plate

Weir height for a bubble cap plate column is the same as that for a seive plate column

Weir height in case of a bubble cap plate ranges from 50 to 150 mm and is higher than the seive plate

The downcomer design and the residence time in the downcomer is almost same for seive plate and bubble cap columns

Weir length for a bubble cap plate is the same as that for the seive plate

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Process Equipment and Plant Design

Process Equipment and Plant Design In actual operation of a bubble cap distillation tower, the __________ at the bottom of the tower is more than that at the top of the tower.

Process Equipment and Plant Design A forced circulation long tube vertical evaporator as compared to the natural circulation evaporator

Process Equipment and Plant Design In actual operation of distillation column, the vapour is not distributed uniformly among the bubble caps, primarily because of the

Process Equipment and Plant Design Low pressure steam (with saturation temperature between 105 to 120°C) is usually used in the vacuum evaporators, which normally employ a vacuum of about __________ mm Hg (referred to a 760 mm mercury barometer).

Process Equipment and Plant Design Pick out the wrong statement about the design of seive plate column and the bubble cap column.

Process Equipment and Plant Design
In actual operation of a bubble cap distillation tower, the __________ at the bottom of the tower is more than that at the top of the tower.

Process Equipment and Plant Design
A forced circulation long tube vertical evaporator as compared to the natural circulation evaporator

Process Equipment and Plant Design
In actual operation of distillation column, the vapour is not distributed uniformly among the bubble caps, primarily because of the

Process Equipment and Plant Design
Low pressure steam (with saturation temperature between 105 to 120°C) is usually used in the vacuum evaporators, which normally employ a vacuum of about __________ mm Hg (referred to a 760 mm mercury barometer).

Process Equipment and Plant Design
Pick out the wrong statement about the design of seive plate column and the bubble cap column.