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Hydrogen is used in Electrolux refrigeration system so as to _________ the rate of evaporation of the liquid ammonia passing through the evaporator.

A. Equalise

B. Reduce

C. Increase

D. None of these

Correct Answer : C.


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  2. In larger industrial and commercial reciprocating compression systems, refrigerant widely used is
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  5. During heating and dehumidification process, dry bulb temperature
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  7. In aircraft, air refrigeration Cycle is used because of
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  9. The refrigerant supplied to a compressor must be
  10. The ratio of heat extracted in the refrigerator to the work-done on the refrigerant is called
  11. Vertical lines on pressure-enthalpy chart show constant
  12. The mass of water vapour present in __________ is called absolute humidity.
  13. A mixture of dry air and water vapour, when the air has diffused the maximum amount of water vapour…
  14. The undesirable property of a refrigerant is
  15. The leaks in a refrigeration system using Freon are detected by
  16. Pressure of water vapour is given by
  17. Which of the following statement is correct?
  18. The temperature of air recorded by a thermometer, when its bulb is surrounded by a wet cloth exposed…
  19. The vapour pressure of refrigerant should be
  20. Rating of a domestic refrigerator is of the order of
  21. A refrigeration system
  22. During humidification process, dry bulb temperature
  23. The moisture in a refrigerant is removed by
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  25. The lower horizontal line of the refrigeration cycle plotted on pressure-enthalpy diagram represents
  26. Bell Coleman cycle is a
  27. Short horizontal lines on pressure-enthalpy chart show
  28. Highest temperature encountered in refrigeration cycle should be
  29. An Electrolux refrigerator is called a __________ absorption system.
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