In most of the shell and tube heat exchangers, the tube pitch is generally __________ the tube diameter.

Process Equipment and Plant Design
In most of the shell and tube heat exchangers, the tube pitch is generally __________ the tube diameter.

Less than

One-fourth of

2.5 times

1.25-1.50 times

Less than

One-fourth of

2.5 times

1.25-1.50 times

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Process Equipment and Plant Design
Pick out the wrong statement pertaining to the comparative evaluation of performance of the packed tower and the plate tower.

Plate tower is preferred over packed tower, if the operation involves liquids containing dispersed solids

Plate tower is perferred, if interstage cooling is required to remove heats of reaction or solution

In operations involving large temperature changes. (e.g. distillation), plate towers are preferred over packed towers as the packing may be crushed due to large temperature changes

The total weight of a dry plate tower is usually much more than that of a dry packed tower designed for the same duty

Plate tower is preferred over packed tower, if the operation involves liquids containing dispersed solids

Plate tower is perferred, if interstage cooling is required to remove heats of reaction or solution

In operations involving large temperature changes. (e.g. distillation), plate towers are preferred over packed towers as the packing may be crushed due to large temperature changes

The total weight of a dry plate tower is usually much more than that of a dry packed tower designed for the same duty

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Process Equipment and Plant Design
Maximum allowable vapour velocity in a bubble cap tower is determined by the

None of these

Diameter of the column

Vapour density

Entrainment considerations

None of these

Diameter of the column

Vapour density

Entrainment considerations

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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 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

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

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Process Equipment and Plant Design
Baffle spacing is generally __________ the I.D. of the shell.

More than

Not greater than

Both B and C

Not less than one fifth of

More than

Not greater than

Both B and C

Not less than one fifth of

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Process Equipment and Plant Design
Pick out the wrong statement pertaining to 'Horton sphere' used for the storage of liquid ammonia.

Diameter of Horton sphere is normally 6 to 25 metres and it is supported by 6 to 12 nos. tubular or rolled section column

Horton sphere is used for the storage of gases and volatile liquid at a moderate pressure of 1 to 10 kg/cm²

Horton sphere is used for the storage of liquid at sub-zero temperature at very high pressure upto 200 kg/cm²

Thickness of spherical shell is half that of the cylinderical vessel under same operating pressure condition. Besides, the ratio of surface area to volume is less for sphere than any other shape ; hen

Diameter of Horton sphere is normally 6 to 25 metres and it is supported by 6 to 12 nos. tubular or rolled section column

Horton sphere is used for the storage of gases and volatile liquid at a moderate pressure of 1 to 10 kg/cm²

Horton sphere is used for the storage of liquid at sub-zero temperature at very high pressure upto 200 kg/cm²

Thickness of spherical shell is half that of the cylinderical vessel under same operating pressure condition. Besides, the ratio of surface area to volume is less for sphere than any other shape ; hen

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Process Equipment and Plant Design

Process Equipment and Plant Design In most of the shell and tube heat exchangers, the tube pitch is generally __________ the tube diameter.

Process Equipment and Plant Design Pick out the wrong statement pertaining to the comparative evaluation of performance of the packed tower and the plate tower.

Process Equipment and Plant Design Maximum allowable vapour velocity in a bubble cap tower is determined by the

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 Baffle spacing is generally __________ the I.D. of the shell.

Process Equipment and Plant Design Pick out the wrong statement pertaining to 'Horton sphere' used for the storage of liquid ammonia.

Process Equipment and Plant Design
In most of the shell and tube heat exchangers, the tube pitch is generally __________ the tube diameter.

Process Equipment and Plant Design
Pick out the wrong statement pertaining to the comparative evaluation of performance of the packed tower and the plate tower.

Process Equipment and Plant Design
Maximum allowable vapour velocity in a bubble cap tower is determined by the

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
Baffle spacing is generally __________ the I.D. of the shell.

Process Equipment and Plant Design
Pick out the wrong statement pertaining to 'Horton sphere' used for the storage of liquid ammonia.