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In refrigerators, the temperature difference between the evaporating refrigerant and the medium being cooled should be

A. High, of the order of 25°

B. As low as possible (3 to 11°C)

C. Zero

D. Any value

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  1. At lower temperatures and pressures, the latent heat of vaporisation of a refrigerant
  2. Most air cooled condensers are designed to operate with a temperature difference of
  3. In a lithium bromide absorption refrigeration system
  4. If a gas is to be liquefied, its temperature must be
  5. The heat rejection factor (HRF) is given by
  6. The evolution of heat of solution takes place in ammonia absorption plant when
  7. The thermostatic expansion valve is used in __________ type of evaporators.
  8. The evaporator used in household refrigerators is
  9. During dehumidification process, __________ remains constant.
  10. The pressure at the inlet of a refrigerant compressor is called
  11. Carbon dioxide is
  12. The specific humidity during heating and humidification process.
  13. The refrigerant after condensation process is cooled below the saturation temperature before throttling.…
  14. One of the purposes of sub cooling the liquid refrigerant is to
  15. The curved lines on a psychrometric chart indicates
  16. Allowable pressure on high pressure side or ammonia absorption system is of the order of
  17. During heating and dehumidification process, dry bulb temperature
  18. The vapour compression refrigerator employs the following cycle
  19. A bootstrap air cooling system has
  20. A refrigeration cycle operates between condenser temperature of + 27°C and evaporator temperature…
  21. The cooling system used for supersonic aircrafts and rockets is
  22. In a vapour compression system, the condition of refrigerant before passing through the condenser is
  23. Which of the following is not a desirable property of a refrigerant?
  24. In a psychrometric chart, specific humidity (moisture content) lines are
  25. When the temperature of the surrounding is higher than the temperature of the body, then the heat loss…
  26. In a refrigerating machine, heat rejected is _________ heat absorbed.
  27. Which of the following refrigerant has the lowest freezing point?
  28. In a refrigeration system, heat absorbed in comparison to heat rejected is
  29. Pressure of water vapour is given by
  30. The domestic refrigerator uses following type of compressor