Mass Transfer
Heat load in a cooling tower

Neither A nor B
Is equal to the number of kg, of water circulated times the cooling range
Means the amount of heat thrown away (KCal/hr.) by the cooling tower
Both A & B

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Mass Transfer
For the air water system under ambient conditions, the adiabatic saturation temperature and the wet bulb temperature are nearly equal, because

They are always equal under all circumstances
Lewis number is close to unity
Water has a high latent heat of evaporation
Solubility of the components of air in water is very small

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