The wet bulb depression is zero when relative humidity is

A. Zero

B. 0.5

C. 0.75

D. 1.0

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  1. A one tonne refrigerating machine means that
  2. The total pressure exerted by the mixture of air and water vapour is equal to the sum of pressures which…
  3. Freon group of refrigerants are
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  5. When the lower temperature of a refrigerating machine is fixed, then the coefficient of performance…
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  7. The leakage in a refrigeration system using Freon is detected by
  8. Which of the following cycles uses air as the refrigerant?
  9. The advantage of dry compression is that
  10. In case of sensible heating of air, the coil efficiency is given by (where B.P.F. = Bypass factor)
  11. The central air conditioning system has ________ overall efficiency as compared to individual systems.
  12. The thermostatic expansion valve is used in __________ type of evaporators.
  13. A refrigeration system
  14. The thermostatic expansion valve is also called
  15. In a vapour compression system, the condition of refrigerant before passing through the condenser is
  16. A refrigerant compressor is used to
  17. Dry bulb temperature is the temperature of air recorded by a thermometer, when
  18. The formation of frost on cooling coils in a refrigerator
  19. Carbon dioxide is
  20. The relative humidity is defined as
  21. The air cooling system mostly used in transport type aircrafts is
  22. In actual air-conditioning applications for R-12 and R-22, and operating at a condenser temperature…
  23. One ton of refrigeration is equal to the refrigeration effect corresponding to melting of 1000 kg of…
  24. The bypass factor (B. P. F.) in case of sensible heating of air is (Where td₁ = Dry bulb temperature…
  25. The evaporator changes the low pressure liquid refrigerant from the expansion valve into
  26. The C.O.P. of a refrigeration cycle with lowering of condenser temperature, keeping the evaporator temperature…
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  28. In vapour compression cycle, the condition of refrigerant is very wet vapour
  29. Which of the following refrigerant is highly toxic and flammable?
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