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

1.004G0.8

0.0176G1.37

HG = 0.0176G0.37

HG = 1.004G0.37

1.004G0.8

0.0176G1.37

HG = 0.0176G0.37

HG = 1.004G0.37

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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

5 to 10

0.01 to 1

1.5 to 2.5

10 to 20

5 to 10

0.01 to 1

1.5 to 2.5

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Process Equipment and Plant Design
The safe distance of habitation from a hazardous chemical plant (TLV of its product < 1000 ppm) should be about __________ kms.

5

15

25

1

5

15

25

1

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Process Equipment and Plant Design
In a shell and tube heat exchanger, tube side __________ of the mass velocity.

Neither A nor B

Pressure drop is proportional to the square

Both A & B

Heat transfer co-efficient is proportional to 0.8th power

Neither A nor B

Pressure drop is proportional to the square

Both A & B

Heat transfer co-efficient is proportional to 0.8th power

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

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

All of these

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

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

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

All of these

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

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

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Process Equipment and Plant Design
The minimum plate spacing in most of the pertroleum refinery distillation columns (of dia > 3 ft) is normally __________ inches.

34

18

6

12

34

18

6

12

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Process Equipment and Plant Design

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 The safe distance of habitation from a hazardous chemical plant (TLV of its product < 1000 ppm) should be about __________ kms.

Process Equipment and Plant Design In a shell and tube heat exchanger, tube side __________ of the mass velocity.

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

Process Equipment and Plant Design The minimum plate spacing in most of the pertroleum refinery distillation columns (of dia > 3 ft) is normally __________ inches.

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
The safe distance of habitation from a hazardous chemical plant (TLV of its product < 1000 ppm) should be about __________ kms.

Process Equipment and Plant Design
In a shell and tube heat exchanger, tube side __________ of the mass velocity.

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

Process Equipment and Plant Design
The minimum plate spacing in most of the pertroleum refinery distillation columns (of dia > 3 ft) is normally __________ inches.