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

  • During humidification process, dry bulb temperature


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

  • Correct Answer
  • remains constant 

    • Heat Transfer, Refrigeration and Air Conditioning problems

    Search Results

    • 1. A Bell Coleman refrigerator working on dense air system as compared to open air system, for the same range of temperature, results in higher coefficient of performance.

    • Options
    • A. Agree
    • B. Disagree
      • Discuss
    • 2. The boiling point of ammonia is

    • Options
    • A. -10.5°C
    • B. -30°C
    • C. -33.3°C
    • D. -77.7°C
      • Discuss
    • 3. The product of Reynolds number and Prandtl number is known as

    • Options
    • A. Stanton number
    • B. Biot number
    • C. Peclet number
    • D. Grashoff number
      • Discuss
    • 4. The relative humidity __________ as air gets drier.

    • Options
    • A. increases
    • B. decreases
      • Discuss
    • 5. A device used for transfering heat from one fluid to another is called heat exchanger.

    • Options
    • A. True
    • B. False
      • Discuss
    • 6. The condition of refrigerant after passing through the condenser in a vapour compression system is

    • Options
    • A. saturated liquid
    • B. wet vapour
    • C. dry saturated vapour
    • D. superheated vapour
      • Discuss
    • 7. Fourier's law of heat conduction gives the heat flow for

    • Options
    • A. irregular surfaces
    • B. non-uniform temperature surfaces
    • C. one dimensional cases only
    • D. two dimensional cases only
      • Discuss
    • 8. In a shell and tube heat exchanger, baffles are provided on the shell side to

    • Options
    • A. improve heat transfer
    • B. provide support for tubes
    • C. prevent stagnation of shell side fluid
    • D. all of these
      • Discuss
    • 9. Dew point temperature is the temperature of air recorded by a thermometer, when the moisture present in it begins to condense.

    • Options
    • A. Correct
    • B. Incorrect
      • Discuss
    • 10. The heat rejection factor (HRF) is given by

    • Options
    • A. 1 + C.O.P
    • B. 1 - C.O.P.
    • C.
    • D.
      • Discuss

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