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The C.O.P. of a refrigeration cycle with lowering of condenser temperature, keeping the evaporator temperature constant, will

A. Increase

B. Decrease

C. May increase or decrease depending on the type of refrigerant used

D. Remain unaffected

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  2. In a vapour compression refrigeration system, a throttle valve is used in place of an expander because
  3. If the evaporator temperature of a plant is lowered, keeping the condenser temperature constant, the…
  4. The bypass factor (B. P. F.) in case of sensible heating of air is (Where td₁ = Dry bulb temperature…
  5. The material of pipe lines for a system using Freon as a refrigerant should be
  6. Hydrogen is used in Electrolux refrigeration system so as to _________ the rate of evaporation of the…
  7. Condensing temperature in a refrigerator is the temperature
  8. The evaporator used in household refrigerators is
  9. Ammonia is
  10. Which of the following statement is wrong?
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  12. The leaks in a refrigeration system using Freon are detected by
  13. The air cooling system mostly used in transport type aircrafts is
  14. Pressure of water vapour is given by
  15. Pick up the wrong statement. A refrigerant should have
  16. In vapour compression cycle the condition off refrigerant is dry saturated vapour
  17. Most air cooled condensers are designed to operate with a temperature difference of
  18. Mass flow ratio of NH₃ in comparison to Freon12 for same refrigeration load and same temperature…
  19. In a refrigeration cycle, the flow of refrigerant is controlled by
  20. The curved lines on a psychrometric chart indicates
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  22. It is desired to condition the outside air from 70% relative humidity and 45° C dry bulb temperature…
  23. Formation of frost on evaporator in refrigerator
  24. The ratio of actual mass of water vapour in a given volume of moist air to the mass of water vapour…
  25. The COP of a vapour compression plant in comparison to vapour absorption plant is
  26. In a domestic refrigerator, a capillary tube controls the flow of refrigerant from the
  27. The central air conditioning system has ________ overall efficiency as compared to individual systems.
  28. The condition of refrigerant as it leaves the compressor in a vapour compression system is
  29. The bank of tubes at the back of domestic refrigerator is
  30. The cooling system used for supersonic aircrafts and rockets is