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The undesirable property of a refrigerant is

A. Non-toxic

B. Non-flammable

C. Non-explosive

D. High boiling point

Correct Answer : D.


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  1. Moisture should be removed from refrigerants to avoid
  2. A refrigeration system
  3. An infinite parallel planes with emissivities e₁ and e₂, the interchange factor for radiation…
  4. In mechanical refrigeration system, the refrigerant has the maximum temperature
  5. In S.J. unit, one ton of refrigeration is equal to
  6. A reversible engine has ideal thermal efficiency of 30%. When it is used as a refrigerating machine…
  7. Condensing temperature in a refrigerator is the temperature
  8. The heat rejection factor (HRF) is given by
  9. In a psychrometric chart, specific humidity (moisture content) lines are
  10. In a vapour compression system, the condition of refrigerant before entering the expansion or throttle…
  11. The sensible heat factor during cooling and dehumidification process is given by (where h₁ =…
  12. Nusselt number (NN) is given by
  13. The wet bulb temperature at 100% relative humidity is ________ dew point temperature.
  14. The refrigerant used in small tonnage commercial machines (hermetically sealed units) is
  15. The wet bulb depression indicates _________ humidity of the air.
  16. The colour of the flame of halide torch, in case of leakage of Freon refrigerant, will change to
  17. The refrigerant widely used in domestic refrigerators is
  18. At lower temperatures and pressures, the latent heat of vaporisation of a refrigerant
  19. The undesirable property of a refrigerant is
  20. The C.O.P. of an absorption type refrigerator is given by (where T₁ = Temperature at which the…
  21. The condition of refrigerant after passing through the expansion or throttle valve, in a vapour compression…
  22. Environmental protection agencies advice against the use of chlorofluorocarbon refrigerants since
  23. Efficiency of a Carnot engine is given as 80%. If the cycle direction be reversed, what will be the…
  24. The bank of tubes at the back of domestic refrigerator is
  25. The difference between dry bulb temperature and dew point temperature, is called
  26. Oil separator in a refrigeration cycle is installed
  27. A pressure gauge on the discharge side of a refrigerant compressor reads too high. The reasons will…
  28. Freon group of refrigerants are
  29. In a vapour absorption refrigeration system, the compressor of the vapour compression system is replaced…
  30. The pressure at the outlet of a refrigerant compressor is called