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Mass Transfer

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

Half
More than
Twice
Equal to

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Mass Transfer
Air initially at 101. 3 kPa and 40°C and with a relative humidity of 50%, is cooled at constant pressure to 30°C. The cooled air has a

Higher dew point
Higher relative humidity
Higher absolute (specific) humidity
Higher wet bulb temperature

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Mass Transfer
During drying operation, it is easier to remove the __________ moisture.

Critical
Bound
Equilibrium
Unbound

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Mass Transfer
In a packed tower, the value of HETP equals HTUOG, when the equilibrium and the operating lines are (where, HETP = height equivalant to a theoretical plate HTUOG = overall gas phase height of a transfer unit)

Neither A nor B
Straight
Parallel
Both A & B

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Mass Transfer
Use of packed towers for distillation is generally limited to the

Vacuum distillation
Small sizes
Multicomponent distillation
High pressure operation

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Mass Transfer
Rose oil is extracted from rose leaves using __________ distillation.

Steam
High pressure
Low pressure
Extractive

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