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The ratio of heat extracted in the refrigerator to the work-done on the refrigerant is called

A. Coefficient of performance of refrigeration

B. Coefficient of performance of heat pump

C. Relative coefficient of performance

D. Refrigerating efficiency

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  1. Most thermostatic expansion valves are set for a superheat of
  2. The sub-cooling in a refrigeration cycle
  3. In a refrigeration cycle, the flow of refrigerant is controlled by
  4. A refrigeration cycle operates between condenser temperature of + 27°C and evaporator temperature…
  5. The undesirable property of a refrigerant is
  6. Short horizontal lines on pressure-enthalpy chart show
  7. During humidification process, __________ increases.
  8. Carbon dioxide is
  9. The temperature of air recorded by a thermometer, when it is not affected by the moisture present in…
  10. An infinite parallel planes with emissivities e₁ and e₂, the interchange factor for radiation…
  11. Air refrigerator works on
  12. Most air cooled condensers are designed to operate with a temperature difference of
  13. In S.J. unit, one ton of refrigeration is equal to
  14. A vapour absorption refrigerator uses __________ as a refrigerant.
  15. One tonne of refrigeration (1TR) means that the heat removing capacity is
  16. In a lithium bromide absorption refrigeration system
  17. An Electrolux refrigerator is called a __________ absorption system.
  18. The ratio of the actual mass of water vapour in a unit mass of dry air to the mass of water vapour in…
  19. The ratio of actual mass of water vapour in a given volume of moist air to the mass of water vapour…
  20. The thermal diffusivity for gases is generally __________ those for liquids.
  21. The temperature of air recorded by a thermometer, when its bulb is surrounded by a wet cloth exposed…
  22. In a vapour compression system, the condition of refrigerant before entering the expansion or throttle…
  23. A standard ice point temperature corresponds to the temperature of
  24. The boiling point of ammonia is
  25. Highest pressure encountered in a refrigeration system should be
  26. In chemical dehumidification process,
  27. In refrigerator, liquid receiver is required between condenser and flow controlling device, if quantity…
  28. One of the purposes of sub cooling the liquid refrigerant is to
  29. Accumulators should have adequate volume to store refrigerant charge at least
  30. In vapour compression cycle, the condition of refrigerant is very wet vapour