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

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


  • Options
  • A. 2 TR
  • B. 4 TR
  • C. 8 TR
  • D. 10 TR

  • Correct Answer
  • 8 TR 

    • Heat Transfer, Refrigeration and Air Conditioning problems

    Search Results

    • 1. In a black body, all radiations are rejected.

    • Options
    • A. True
    • B. False
      • Discuss
    • 2. 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
    • 3. The expression is used for calculating

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

    • Options
    • A. Correct
    • B. Incorrect
      • Discuss
    • 5. When there is an addition of water vapour to the air of enclosed space, a gain in __________ is said to occur.

    • Options
    • A. sensible heat
    • B. latent heat
      • Discuss
    • 6. The specific humidity during humidification process

    • Options
    • A. remains constant
    • B. increases
    • C. decreases
      • Discuss
    • 7. Planck's law holds good for all coloured bodies.

    • Options
    • A. True
    • B. False
      • Discuss
    • 8. 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
    • 9. 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
    • 10. The thermal diffusivity for solids is generally less than those for liquids and gases.

    • Options
    • A. True
    • B. False
      • Discuss

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