List of top Agricultural Process Engineering Questions on Psychrometry asked in GATE AG

At \(60\,^{\circ}\text{C}\) dry bulb temperature, saturated water vapour pressure is 20 kPa and relative humidity is 20%. The corresponding absolute humidity of air at atmospheric pressure is nearest to (Take molecular weight of water = 18.02 g.mol\(^{-1}\), molecular weight of air = 28.97 g.mol\(^{-1}\), and atmospheric pressure = 101.325 kPa)
Molecular masses of water and air are 18.02 kg/(mol·mol) and 28.97 kg/(mol·mol), respectively. The room temperature is 40°C under total pressure 101.3 kPa. The relative humidity at 40°C is 73.7 kPa. Find the relative humidity in percent.