Pick out the wrong statement pertaining to the design of the bubble cap tray of a distillation column to give stable operation and even vapour distribution.

Process Equipment and Plant Design
Pick out the wrong statement pertaining to the design of the bubble cap tray of a distillation column to give stable operation and even vapour distribution.

Tendency towards stable operation is increased by increasing the skirt clearance of the caps, lowering the rate of liquid flow per unit plate width or increasing the spacing between the caps

The dimensionless ratio of liquid gradient to pressure drop head caused by the bubble cap assembly should be less than 0.4

The pressure drop due to the caps & slots and the static submergence should be as high as practicable for reasonable operation

None of these

Tendency towards stable operation is increased by increasing the skirt clearance of the caps, lowering the rate of liquid flow per unit plate width or increasing the spacing between the caps

The dimensionless ratio of liquid gradient to pressure drop head caused by the bubble cap assembly should be less than 0.4

The pressure drop due to the caps & slots and the static submergence should be as high as practicable for reasonable operation

None of these

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Process Equipment and Plant Design
A rivetted joint does not fail by __________ of rivets.

Shearing

Tearing of the plate across a row

None of these

Tearing

Shearing

Tearing of the plate across a row

None of these

Tearing

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Process Equipment and Plant Design
The operating velocity in the absorption tower is usually 40-50% of the flooding velocity. Packed absorption towers are normally designed for a pressure drop of about __________ mm of water column per metre height of packing.

100-150

43835

1000-1500

20-40

100-150

43835

1000-1500

20-40

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

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

Both B & C

Is economical in operation

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

Both B & C

Is economical in operation

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Process Equipment and Plant Design
Liquid gradient over the tray results due to the

Large plate spacing

Large reflux ratio

Low gas velocity

Resistance offered to flow of liquids by caps & risers and the flow of gas

Large plate spacing

Large reflux ratio

Low gas velocity

Resistance offered to flow of liquids by caps & risers and the flow of gas

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Process Equipment and Plant Design
Hazards associated with the relief valve leakage for extremely hazardous material storage can be taken care of by providing

Surge chamber

Dikes

None of these

Rupture diaphragm

Surge chamber

Dikes

None of these

Rupture diaphragm

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Process Equipment and Plant Design

Process Equipment and Plant Design Pick out the wrong statement pertaining to the design of the bubble cap tray of a distillation column to give stable operation and even vapour distribution.

Process Equipment and Plant Design A rivetted joint does not fail by __________ of rivets.

Process Equipment and Plant Design The operating velocity in the absorption tower is usually 40-50% of the flooding velocity. Packed absorption towers are normally designed for a pressure drop of about __________ mm of water column per metre height of packing.

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

Process Equipment and Plant Design Liquid gradient over the tray results due to the

Process Equipment and Plant Design Hazards associated with the relief valve leakage for extremely hazardous material storage can be taken care of by providing

Process Equipment and Plant Design
Pick out the wrong statement pertaining to the design of the bubble cap tray of a distillation column to give stable operation and even vapour distribution.

Process Equipment and Plant Design
A rivetted joint does not fail by __________ of rivets.

Process Equipment and Plant Design
The operating velocity in the absorption tower is usually 40-50% of the flooding velocity. Packed absorption towers are normally designed for a pressure drop of about __________ mm of water column per metre height of packing.

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

Process Equipment and Plant Design
Liquid gradient over the tray results due to the

Process Equipment and Plant Design
Hazards associated with the relief valve leakage for extremely hazardous material storage can be taken care of by providing