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Question

The relative humidity of ambient air at 300 K is 50% with a partial pressure of water vapour equal to Pv. The saturation pressure of water at 300 K is Psat. The correct relation for the air-water mixture is

The correct answer is

Pv = 0.5Psat

Relative humidity is \(\phi=P_v/P_{sat}\) at the same temperature. With φ = 0.5, Pv = 0.5 Psat.

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Important Questions from Properties of Moist Air (Psychrometric Properties)

  1. Spray humidifying is the process of adding moisture to the air by passing it through

    A. Chiller

    B. Air conditioning plant

    C. Washers
  2. Dew point temperature is the temperature at which condensation begins when the air is cooled at constant

  3. Which of the following increases during sensible heating of moist air

    1. Relative Humidity 

    2. Humidity Ratio

    3. Wet bulb temperature 

    4. Specific volume 

    Select the correct answer from codes given below: 

  4. Relative humidity is the ratio of:

  5. In a saturated air-water vapour mixture, the

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