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Home ‣ Mechanical Engineering ‣ Heat Transfer, Refrigeration and Air Conditioning Comments
  • Question

  • The specific humidity during humidification process


  • Options
  • A. remains constant
  • B. increases
  • C. decreases

  • Correct Answer
  • increases 

    • Heat Transfer, Refrigeration and Air Conditioning problems

    Search Results

    • 1. An ordinary passenger aircraft requires a cooling system of capacity.

    • Options
    • A. 2 TR
    • B. 4 TR
    • C. 8 TR
    • D. 10 TR
      • Discuss
    • 2. In a black body, all radiations are rejected.

    • Options
    • A. True
    • B. False
      • Discuss
    • 3. In aqua-ammonia absorption refrigeration system, incomplete rectification leads to accumulation of water in

    • Options
    • A. condenser
    • B. evaporator
    • C. absorber
    • D. none of these
      • Discuss
    • 4. The expression is used for calculating

    • Options
    • A. relative humidity
    • B. humidity ratio
    • C. degree of saturation
    • D. pressure of water vapour
      • Discuss
    • 5. The temperature below which a gas is always liquified, is known as critical temperature.

    • Options
    • A. Correct
    • B. Incorrect
      • Discuss
    • 6. Planck's law holds good for all coloured bodies.

    • Options
    • A. True
    • B. False
      • Discuss
    • 7. The reduced ambient air cooling system has

    • Options
    • A. one cooling turbine and one heat exchanger
    • B. one cooling turbine and two heat exchangers
    • C. two cooling turbines and one heat exchanger
    • D. two cooling turbines and two heat exchangers
      • Discuss
    • 8. 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 ? = Degree of saturation)

    • Options
    • A.
    • B.
    • C.
    • D. none of these
      • Discuss
    • 9. The thermal diffusivity for solids is generally less than those for liquids and gases.

    • Options
    • A. True
    • B. False
      • Discuss
    • 10. The by-pass factor (B. P. F.) in case of sensible heating of air is (Where td1 = Dry bulb temperature of air entering the heating coil, td2 = Dry bulb temperature of air leaving the heating coil, and td3 = Dry bulb temperature of heating coil)

    • Options
    • A.
    • B.
    • C.
    • D.
      • Discuss

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