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

  • The horizontal and non-uniformly spaced lines on a psychrometric chart indicates


  • Options
  • A. dry bulb temperature
  • B. wet bulb temperature
  • C. dew point temperature
  • D. specific humidity

  • Correct Answer
  • dew point temperature 

    • Heat Transfer, Refrigeration and Air Conditioning problems

    Search Results

    • 1. Sensible heat factor is given by (where S.H. = Sensible heat, and L.H. = Latent heat)

    • Options
    • A.
    • B.
    • C.
    • D.
      • Discuss
    • 2. The wet bulb temperature at 100% relative humidity is __________ dry bulb temperature.

    • Options
    • A. same as
    • B. lower than
    • C. higher than
      • Discuss
    • 3. In case of sensible heating of air, the coil efficiency is given by (where B.P.F. = By-pass factor)

    • Options
    • A. B.P.F. - 1
    • B. 1 - B.P.F.
    • C.
    • D. 1 + B.RF.
      • Discuss
    • 4. The coefficient of performance of vapour compression refrigeration system is quite __________ as compared to air refrigeration system.

    • Options
    • A. low
    • B. high
      • Discuss
    • 5. Wein's law states that the wave length corresponding to __________ is proportional to the absolute temperature.

    • Options
    • A. minimum energy
    • B. maximum energy
      • Discuss
    • 6. In order to cool and dehumidify a stream of moist air, it must be passed over the coil at a temperature

    • Options
    • A. which lies between the dry bulb and wet bulb temperatures of the incoming stream
    • B. which lies between the wet bulb and dew point temperatures of the incoming stream
    • C. which is lower than the dew point temperature of the incoming stream
    • D. of adiabatic saturation of incoming stream
      • Discuss
    • 7. Which of the following refrigerant is highly toxic and flammable?

    • Options
    • A. Ammonia
    • B. Carbon dioxide
    • C. Sulphur dioxide
    • D. R-12
      • Discuss
    • 8. The most commonly used method for the design of duct size is the

    • Options
    • A. velocity reduction method
    • B. equal friction method
    • C. static regain method
    • D. dual or double method
      • Discuss
    • 9. The undesireable property of a refrigerant is

    • Options
    • A. non-toxic
    • B. non-flammable
    • C. non-explosive
    • D. high boiling point
      • Discuss
    • 10. The expression Q = ? AT4 is called

    • Options
    • A. Fourier equation
    • B. Stefan-Boltzmann equation
    • C. Newton-Rikhmann equation
    • D. Joseph-Stefan equation
      • Discuss

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