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Discussion :: Refrigeration and Air Conditioning

  1. 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)

    2. A.

     0.622 Pv / (Pb - Pv)
    B.

     μ/[1 - (1 - μ) (Ps/Pb)]
    C.

     [Pv (Pb - Pd)]/ [Pd (Pb - Pv)]
    D.

     None of these

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    Answer : Option B

    Explanation :

    Relative humidity is given by μ/[1 - (1 - μ) (Ps/Pb)]
    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,
    μ = Degree of saturation)

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