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

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Mass Transfer
Dew point of an air-water vapor mixture

At constant humidity & total pressure is fixed
All of the listed here
Corresponding to any point on the humidity chart is obtained by projecting a line through this point parallel to the temperature axis and to the saturation curve
Decreases with decrease in pressure

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