Refrigeration in aeroplanes usually employs the following refrigerant

A. CO2

B. Freon-11

C. Freon-22

D. Air

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  1. The wet bulb temperature during sensible heating of air
  2. One ton of refrigeration is equal to the refrigeration effect corresponding to melting of 1000 kg of…
  3. Which of the following refrigerant is highly toxic and flammable?
  4. The sensible heat factor during the heating and humidification process is given by (where h₁…
  5. A mixture of dry air and water vapour, when the air has diffused the maximum amount of water vapour…
  6. Air conditioning means
  7. The emissivity of a polished silver body is __________ as compared to black body.
  8. Short horizontal lines on pressure-enthalpy chart show
  9. The condition of refrigerant as it leaves the compressor in a vapour compression system is
  10. At lower temperatures and pressures, the latent heat of vaporisation of a refrigerant
  11. In a vapour compression system, the condition of refrigerant before entering the expansion or throttle…
  12. The total pressure exerted by the mixture of air and water vapour is equal to the sum of pressures which…
  13. The humidification process, on the psychrometric chart is shown by
  14. In actual air-conditioning applications for R-12 and R-22, and operating at a condenser temperature…
  15. In a psychrometric chart, specific humidity (moisture content) lines are
  16. A standard ice point temperature corresponds to the temperature of
  17. The C.O.P. of an absorption type refrigerator is given by (where T₁ = Temperature at which the…
  18. The central air conditioning system has ________ overall efficiency as compared to individual systems.
  19. In a domestic vapour compression refrigerator, the refrigerant commonly used is
  20. Accumulators should have adequate volume to store refrigerant charge at least
  21. As relative humidity decreases, the dew point temperature will be ________ wet bulb temperature.
  22. The specific humidity during heating and humidification process.
  23. In a refrigeration system, heat absorbed in comparison to heat rejected is
  24. The thermal diffusivity for gases is generally __________ those for liquids.
  25. The refrigerant for a refrigerator should have
  26. Rick up the incorrect statement
  27. Relative humidity is given by (where pv = Partial pressure of water vapour, pb = Barometric pressure,…
  28. The bypass factor (B. P. F.) in case of sensible heating of air is (Where td₁ = Dry bulb temperature…
  29. The refrigerant after condensation process is cooled below the saturation temperature before throttling.…
  30. Condensing temperature in a refrigerator is the temperature