Heat transfer co-efficient, hG(Kcal/hr.m² .°C) and mass velocity of air, G (kg/hr.m² ) for air flow parallel to the surface in case of constant drying rate in batch drying is related as hG = 0.0176G0.8. But when the flow of air perpendicular to the surface is encountered, this equation changes to

Process Equipment and Plant Design
Heat transfer co-efficient, hG(Kcal/hr.m² .°C) and mass velocity of air, G (kg/hr.m² ) for air flow parallel to the surface in case of constant drying rate in batch drying is related as hG = 0.0176G0.8. But when the flow of air perpendicular to the surface is encountered, this equation changes to

HG = 1.004G0.37

0.0176G1.37

1.004G0.8

HG = 0.0176G0.37

HG = 1.004G0.37

0.0176G1.37

1.004G0.8

HG = 0.0176G0.37

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Process Equipment and Plant Design
Hold up of material in a operating rotary drier is in the range of

0.8 to 0.9

0.25 to 0.50

0.5 to 0.8

0.05 to 0.15

0.8 to 0.9

0.25 to 0.50

0.5 to 0.8

0.05 to 0.15

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Process Equipment and Plant Design
Rotary driers are most economically designed for the number of heat transfer units (HTU) from

10 to 20

1.5 to 2.5

5 to 10

0.01 to 1

10 to 20

1.5 to 2.5

5 to 10

0.01 to 1

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

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

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

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

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

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

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

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Process Equipment and Plant Design
1.2 to 3.8 cms is the value of the

Static submergence in case of a bubble cap tray for column operating under pressure (≥ 1 atm.)

All of these

Skirt clearance for bubble caps

Downcomer liquid seal in case of a balanced tray design

Static submergence in case of a bubble cap tray for column operating under pressure (≥ 1 atm.)

All of these

Skirt clearance for bubble caps

Downcomer liquid seal in case of a balanced tray design

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Process Equipment and Plant Design
If a single tube pass heat exchanger is converted to two passes; for the same flow rate, the pressure drop per unit length in tube side will __________ times.

Increase by 1.8

None of these

Decrease by 22

Increase by 21.6

Increase by 1.8

None of these

Decrease by 22

Increase by 21.6

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Process Equipment and Plant Design

Process Equipment and Plant Design Hold up of material in a operating rotary drier is in the range of

Process Equipment and Plant Design Rotary driers are most economically designed for the number of heat transfer units (HTU) from

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 1.2 to 3.8 cms is the value of the

Process Equipment and Plant Design If a single tube pass heat exchanger is converted to two passes; for the same flow rate, the pressure drop per unit length in tube side will __________ times.

Process Equipment and Plant Design
Hold up of material in a operating rotary drier is in the range of

Process Equipment and Plant Design
Rotary driers are most economically designed for the number of heat transfer units (HTU) from

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
1.2 to 3.8 cms is the value of the

Process Equipment and Plant Design
If a single tube pass heat exchanger is converted to two passes; for the same flow rate, the pressure drop per unit length in tube side will __________ times.