Absorption system normally uses the following refrigerant

A. Freon-11

B. Freon-22

C. CO2

D. Ammonia

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  1. Degree of saturation or percentage humidity is
  2. Pressure of water vapour is given by
  3. In vapour compression cycle the condition off refrigerant is dry saturated vapour
  4. Superheating in a refrigeration cycle
  5. The human body feels comfortable when the heat stored in the body is
  6. A refrigeration system
  7. The lower horizontal line of the refrigeration cycle plotted on pressure-enthalpy diagram represents
  8. Most air cooled condensers are designed to operate with a temperature difference of
  9. The reciprocating refrigerant compressors are very suitable for
  10. The specific humidity during dehumidification process
  11. The temperature of air recorded by a thermometer, when its bulb is surrounded by a wet cloth exposed…
  12. The thermal diffusivity for gases is generally __________ those for liquids.
  13. Wet bulb temperature is the temperature of air recorded by a thermometer, when
  14. Efficiency of a Carnot engine is given as 80%. If the cycle direction be reversed, what will be the…
  15. Which of the following refrigerant has the highest freezing point.
  16. Accumulators should have adequate volume to store refrigerant charge at least
  17. As relative humidity decreases, the dew point temperature will be ________ wet bulb temperature.
  18. The operating pressure for refrigerating units using R-12 as a refrigerant is
  19. The vapour pressure of refrigerant should be
  20. In case of sensible heating of air, the coil efficiency is given by (where B.P.F. = Bypass factor)
  21. The mass of water vapour present in __________ is called absolute humidity.
  22. The boiling point of carbon dioxide is
  23. In a domestic vapour compression refrigerator, the refrigerant commonly used is
  24. The Freon group of refrigerants are
  25. For evaporators and condensers, for the given conditions, the logarithmic mean temperature difference…
  26. A refrigerant with the highest critical pressure is
  27. The capillary tube is not used in large capacity refrigeration systems because
  28. The C.O.P. of an absorption type refrigerator is given by (where T₁ = Temperature at which the…
  29. In a vapour compression refrigeration system, a throttle valve is used in place of an expander because
  30. Dry bulb temperature is the temperature of air recorded by a thermometer, when