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Mass Transfer

Mass Transfer
Operating velocity in a packed tower is usually __________ the flooding velocity.

Equal to
Half
More than
Twice

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Mass Transfer
Which of the following provides maximum contact surface for a liquid-vapour system?

Seive-plate column
Packed tower
Wetted wall column
Bubble-cap plate column

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Mass Transfer
Acetic acid will be most economically separated from a dilute solution of acetic acid in water by

Absorption
Continuous distillation
Solvent extraction
Evaporation

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Mass Transfer
Water-ethyl alcohal solution can be concentrated (in respect of alcohal concentration) by __________ distillation.

Vacuum
None of these
Atmospheric
High pressure

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Mass Transfer
Hypersorption refers to a __________ process.

Fixed bed absorption
Moving bed absorption
Fixed bed adsorption
Moving bed adsorption

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Mass Transfer
Unsaturated air (with dry bulb and wet bulb temperatures being 45°C and 25°C respectively) is passed through a water spray chamber maintained at 23°C. The air will be cooled and

None of these
Dehumidified
Humidified with wet bulb temperature decreasing
Humidified at constant wet bulb temperature

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