Mass Transfer
The temperature of water cooled in cooling tower is always __________ temperature of entering air.

Equal to the wet bulb
Less than the wet bulb
More than the wet bulb
Equal to the dry bulb

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Mass Transfer
The term "cooling range" in a cooling tower refers to the difference in the temperature of

Cold water leaving the tower and the wet bulb temperature of the surrounding air
Hot water entering the tower and the wet bulb temperature of the surrounding air
None of the listed here
Hot water entering the tower and the cooled water leaving the tower

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Mass Transfer
Plate efficiency

Is a function of the mass transfer between liquid and vapour
Increases due to foaming
Increases due to liquid entrainment
Increases due to weeping and dumping of liquid

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Mass Transfer
For water-ethanol system, the minimum reflux ratio

Is computed from the slope of the upper operating line that is tangent to the equilibrium curve
Is the optimum reflux ratio
Cannot be computed
Is computed from the intercept of the operating line

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