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Home Mechanical Engineering Heat Transfer, Refrigeration and Air Conditioning Comments

  • Question
  • The wet bulb temperature at 100% relative humidity is __________ dew point temperature.


  • Options
  • A. same as
  • B. lower than
  • C. higher than

  • Correct Answer
  • same as 


  • Heat Transfer, Refrigeration and Air Conditioning problems


    Search Results


    • 1. The water, alcohol and ammonia have same refrigerating effect at different altitudes.

    • Options
    • A. Yes
    • B. No
    • Discuss
    • 2. During gas charging in an ammonia vapour compression system, the connection is made at the compressor outlet.

    • Options
    • A. Agree
    • B. Disagree
    • Discuss
    • 3. The transfer of heat from one body to another takes place only when there is a temperature difference between the bodies.

    • Options
    • A. Yes
    • B. No
    • Discuss
    • 4. The sulphur sticks, in case of leakage of ammonia refrigerant, gives white smoke.

    • Options
    • A. True
    • B. False
    • Discuss
    • 5. Which of the following statement is correct?

    • Options
    • A. A grey body is one which absorbs all radiations incident on it.
    • B. At thermal equilibrium, the emissivity and absorptivity are same.
    • C. The energy absorbed by a body to the total energy falling on it, is called emissivity.
    • D. A perfect body is one which is black in colour.
    • Discuss
    • 6. Thermal diffusivity of a substance is given by (where h = Thermal diffusivity, ? = Density of substance, S = Specific heat, and k = Thermal conductivity)

    • Options
    • A.
    • B.
    • C.
    • D.
    • Discuss
    • 7. The counter-current flow heat exchanger can transfer __________ heat than parallel flow heat exchanger.

    • Options
    • A. less
    • B. more
    • Discuss
    • 8. The natural convection air cooled condensers are used in

    • Options
    • A. domestic refrigerators
    • B. water coolers
    • C. room air conditioners
    • D. all of these
    • Discuss
    • 9. The conditioned air supplied to the room must have the capacity to take up

    • Options
    • A. room sensible heat load only
    • B. room latent heat load only
    • C. both room sensible heat and latent heat loads
    • D. none of the above
    • Discuss
    • 10. A pressure gauge on the discharge side of a refrigerant compressor reads too high. The reasons will be

    • Options
    • A. lack of cooling water
    • B. water temperature being high
    • C. dirty condenser surface
    • D. all of these
    • Discuss


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