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

  • Wet bulb temperature indicates the moisture content in air.


  • Options
  • A. Agree
  • B. Disagree

  • Correct Answer
  • Agree 

    • Heat Transfer, Refrigeration and Air Conditioning problems

    Search Results

    • 1. The drier in a refrigeration system removes moisture in the system.

    • Options
    • A. Correct
    • B. Incorrect
      • Discuss
    • 2. For a given dry bulb temperature, as the relative humidity __________ the wet bulb temperature will increase.

    • Options
    • A. increases
    • B. decreases
      • Discuss
    • 3. In counter-current flow heat exchanger, the logarithmic temperature difference between the fluids is __________ as compared to parallel flow heat exchanger.

    • Options
    • A. same
    • B. less
    • C. greater
      • Discuss
    • 4. Pressure of water vapour is given by

    • Options
    • A.
    • B.
    • C.
    • D. none of these
      • Discuss
    • 5. The critical thickness of insulation is the ratio of thermal conductivity of the insulating material (k) to the heat transfer coefficient at the outer surface of the insulation (h0).

    • Options
    • A. True
    • B. False
      • Discuss
    • 6. A vapour absorption refrigeration system

    • Options
    • A. gives noisy operation
    • B. gives quiet operation
    • C. requires little power consumption
    • D. cools below 0° C
      • Discuss
    • 7. The relative humidity lines on a psychrometric chart are

    • Options
    • A. vertical and uniformly spaced
    • B. horizontal and uniformly spaced
    • C. horizontal and non-uniformly spaced
    • D. curved lines
      • Discuss
    • 8. A designer chooses the values of fluid flow rates and specific heats in such a manner that the heat capacities of the two fluids are equal. A hot fluid enters the counter flow heat exchanger at 100° C and leaves at 60° C. A cold fluid enters the heat exchanger at 40° C. The mean temperature difference between the two fluids is

    • Options
    • A. 20°C
    • B. 40°C
    • C. 60°C
    • D. 66.7°C
      • Discuss
    • 9. The value of the wave length for maximum emissive power is given by

    • Options
    • A. Kirchhoff's law
    • B. Stefan's law
    • C. Wein's law
    • D. Planck's law
      • Discuss
    • 10. The __________ point of ammonia is -77.7°C.

    • Options
    • A. freezing
    • B. boiling
      • Discuss

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