The freezing point of R-12 is

A. -86.6°C

B. -95.2°C

C. -107.7°C

D. -135.8°C

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  1. The coefficient of performance of a domestic refrigerator is ________ as compared to a domestic air-conditioner.
  2. When the lower temperature of a refrigerating machine is fixed, then the coefficient of performance…
  3. In actual air-conditioning applications for R-12 and R-22, and operating at a condenser temperature…
  4. The lowest thermal diffusivity is of
  5. During sensible cooling,
  6. An Electrolux refrigerator is called a __________ absorption system.
  7. During dehumidification process, __________ remains constant.
  8. The bypass factor, in case of sensible cooling of air, is given by (where td₁ = Dry bulb temperature…
  9. Relative humidity is given by (where pv = Partial pressure of water vapour, pb = Barometric pressure,…
  10. In vapour compression cycle, the condition of refrigerant is high pressure saturated liquid
  11. Condensing temperature in a refrigerator is the temperature
  12. A heat pump working on a reversed Carnot cycle has a C.O.P. of 5. It works as a refrigerator taking…
  13. Rating of a domestic refrigerator is of the order of
  14. The formation of frost on cooling coils in a refrigerator
  15. Highest pressure encountered in a refrigeration system should be
  16. In a refrigeration cycle, the flow of refrigerant is controlled by
  17. The specific humidity during humidification process
  18. A refrigerant compressor is used to
  19. Ammonia is
  20. In chemical dehumidification process,
  21. The emissivity of a polished silver body is __________ as compared to black body.
  22. The heat rejection factor (HRF) is given by
  23. The colour of the flame of halide torch, in case of leakage of Freon refrigerant, will change to
  24. The refrigerant used in small tonnage commercial machines (hermetically sealed units) is
  25. Critical temperature is the temperature above which
  26. The capillary tube, as an expansion device, is used in
  27. The condition of refrigerant after passing through the condenser in a vapour compression system is
  28. The condition of refrigerant after passing through the expansion or throttle valve, in a vapour compression…
  29. In aqua ammonia absorption refrigeration system, incomplete rectification leads to accumulation of water…
  30. One tonne of refrigeration (1TR) means that the heat removing capacity is