Relative humidity is given by (where pv = Partial pressure of water vapour, pb = Barometric pressure, ps = Pressure of saturated air, pd = Pressure at dry bulb temperature, pw = Saturation pressure corresponding to wet bulb temperature, and μ = Degree of saturation)

Relative humidity is given by (where p_v = Partial pressure of water vapour, p_b = Barometric pressure, p_s = Pressure of saturated air, p_d = Pressure at dry bulb temperature, p_w = Saturation pressure corresponding to wet bulb temperature, and μ = Degree of saturation)

a) 0.622 Pv / (Pb – Pv)

b) μ/[1 – (1 – μ) (Ps/Pb)]

c) [Pv (Pb – Pd)]/ [Pd (Pb – Pv)]

d) None of these

Refrigeration & Air-Conditioning Practice Set-4