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Air refrigeration cycle is used in

A. Commercial refrigerators

B. Domestic refrigerators

C. Air-conditioning

D. Gas liquefaction

Correct Answer : D.


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  1. The value of C.O.P in vapour compression cycle is usually
  2. Air refrigeration cycle is used in
  3. During sensible cooling of air, specific humidity
  4. When the air is passed through an insulated chamber having sprays of water maintained at a temperature…
  5. Short horizontal lines on pressure-enthalpy chart show
  6. When the lower temperature of a refrigerating machine is fixed, then the coefficient of performance…
  7. The bypass factor, in case of sensible cooling of air, is given by (where td₁ = Dry bulb temperature…
  8. Which of the following statement is correct for ammonia as a refrigerant?
  9. The comfort conditions in air conditioning are at (where DBT = Dry bulb temperature, and RH = Relative…
  10. In a refrigeration cycle, the flow of refrigerant is controlled by
  11. Allowable pressure on high pressure side or ammonia absorption system is of the order of
  12. The wet bulb temperature at 100% relative humidity is ________ dew point temperature.
  13. A reversible engine has ideal thermal efficiency of 30%. When it is used as a refrigerating machine…
  14. Superheating in a refrigeration cycle
  15. The reciprocating refrigerant compressors are very suitable for
  16. Which of the following refrigerant has the highest freezing point.
  17. The bypass factor (B. P. F.) in case of sensible heating of air is (Where td₁ = Dry bulb temperature…
  18. Highest pressure encountered in a refrigeration system should be
  19. During humidification process, dry bulb temperature
  20. A vapour absorption refrigerator uses __________ as a refrigerant.
  21. The COP of a domestic refrigerator
  22. While designing the refrigeration system of an aircraft, the prime consideration is that the
  23. Pressure of water vapour is given by
  24. The specific humidity during dehumidification process
  25. The suction pipe diameter of refrigerating unit compressor in comparison to delivery side is
  26. Most thermostatic expansion valves are set for a superheat of
  27. The humidification process, on the psychrometric chart is shown by
  28. A certain refrigerating system has a normal operating suction pressure of 10 kg/cm gauge and condensing…
  29. The higher temperature in vapour compression cycle occurs at
  30. In a refrigeration system, heat absorbed in comparison to heat rejected is