In case of a continuous distillation column, increase in reflux ratio may result in the

Process Equipment and Plant Design
In case of a continuous distillation column, increase in reflux ratio may result in the

Greater cost for the reboiler heat supply

Greater cost for the condenser coolant

All of these

Lower fixed charges for the column

Greater cost for the reboiler heat supply

Greater cost for the condenser coolant

All of these

Lower fixed charges for the column

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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 = 0.0176G0.37

HG = 1.004G0.37

1.004G0.8

0.0176G1.37

HG = 0.0176G0.37

HG = 1.004G0.37

1.004G0.8

0.0176G1.37

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Process Equipment and Plant Design
Theoretically calculated diameter of the stripping section of the continuous rectification column is __________ that of the enriching section.

More than

Same as

Less than

Either more or less (depending upon relative volatility)

More than

Same as

Less than

Either more or less (depending upon relative volatility)

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Process Equipment and Plant Design
The ratio of down take area to cross-sectional area of the tube, for calendria type evaporator ranges from

0.5 to 1

1 to 1.5

1.5 to 2

2 to 2.5

0.5 to 1

1 to 1.5

1.5 to 2

2 to 2.5

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Process Equipment and Plant Design
In packed absorption tower, onset of flooding usually occurs at a pressure drop of about __________ mm of water column per metre height of packing.

750-1000

200-250

25-50

50-75

750-1000

200-250

25-50

50-75

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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).

650

750

250

450

650

750

250

450

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Process Equipment and Plant Design

Process Equipment and Plant Design In case of a continuous distillation column, increase in reflux ratio may result in the

Process Equipment and Plant Design Theoretically calculated diameter of the stripping section of the continuous rectification column is __________ that of the enriching section.

Process Equipment and Plant Design The ratio of down take area to cross-sectional area of the tube, for calendria type evaporator ranges from

Process Equipment and Plant Design In packed absorption tower, onset of flooding usually occurs at a pressure drop of about __________ mm of water column per metre height of packing.

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
In case of a continuous distillation column, increase in reflux ratio may result in the

Process Equipment and Plant Design
Theoretically calculated diameter of the stripping section of the continuous rectification column is __________ that of the enriching section.

Process Equipment and Plant Design
The ratio of down take area to cross-sectional area of the tube, for calendria type evaporator ranges from

Process Equipment and Plant Design
In packed absorption tower, onset of flooding usually occurs at a pressure drop of about __________ mm of water column per metre height of packing.

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).