Mass Transfer
Relative humidity is the ratio of the

Partial pressure of the vapour to the vapour pressure of the liquid at gas temperature
None of these
Actual humidity to saturation humidity
Partial pressure of the vapour to the vapour pressure of the liquid at room temperature

ANSWER DOWNLOAD EXAMIANS APP

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

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

ANSWER DOWNLOAD EXAMIANS APP