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The refrigerant used for absorption refrigerators working on heat from solar collectors is a mixture of water and

A. Carbon dioxide

B. Sulphur dioxide

C. Lithium bromide

D. R-12

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  1. The refrigeration effect in a dry evaporator compared to flooded evaporator in a similar plant is
  2. The total pressure exerted by the mixture of air and water vapour is equal to the sum of pressures which…
  3. Critical pressure of a liquid is the pressure
  4. The condensing pressure due to the presence of non-condensable gases, as compared to that actually required…
  5. In a refrigeration system, heat absorbed in comparison to heat rejected is
  6. The dry bulb temperature lines, on the psychrometric chart are
  7. Where does the lowest temperature occur in a vapour compression cycle?
  8. Hydrogen is used in Electrolux refrigeration system so as to _________ the rate of evaporation of the…
  9. The material of pipe lines for a system using Freon as a refrigerant should be
  10. For large tonnage (more than 200 TR) air-conditioning applications, the compressor recommended is
  11. The C.O.P. of a heat pump working on a reversed Carnot cycle is
  12. Wet bulb temperature is the temperature of air recorded by a thermometer, when
  13. The Freon group of refrigerants are
  14. The humidity ratio or specific humidity is the mass of water vapour present in
  15. The index which correlates the combined effects of air temperature, relative humidity and air velocity…
  16. In aircraft, air refrigeration Cycle is used because of
  17. Presence of moisture in a refrigerant affects the working of
  18. A refrigerating system operating on reversed Brayton refrigeration cycle is used for maintaining 250…
  19. The temperature of air recorded by a thermometer, when its bulb is surrounded by a wet cloth exposed…
  20. The sensible heat factor during cooling and dehumidification process is given by (where h₁ =…
  21. During sensible heating of air _________ decreases.
  22. In a domestic vapour compression refrigerator, the refrigerant commonly used is
  23. Efficiency of a Carnot engine is given as 80%. If the cycle direction be reversed, what will be the…
  24. In case of sensible heating of air, the coil efficiency is given by (where B.P.F. = Bypass factor)
  25. Air refrigeration cycle is used in
  26. Air refrigeration cycle is used in
  27. The undesirable property of a refrigerant is
  28. Which of the following statement is correct for ammonia as a refrigerant?
  29. The power per tonne of refrigeration is
  30. The process, generally used in winter air-conditioning to warm and humidity the air, is called