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Wet bulb temperature is the temperature of air recorded by a thermometer, when

A. It is not affected by the moisture present in the air

B. Its bulb is surrounded by a wet cloth exposed to the air

C. The moisture present in it begins to condense

D. None of the above

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  1. The lower horizontal line of the refrigeration cycle plotted on pressure-enthalpy diagram represents
  2. A refrigeration cycle operates between condenser temperature of + 27°C and evaporator temperature…
  3. Absorption system normally uses the following refrigerant
  4. The pressure at the inlet of a refrigerant compressor is called
  5. The dehumidification process, on the psychrometric chart, is shown by
  6. The C.O.P. of a refrigerator working on a reversed Carnot cycle is (where T₁ = Lowest absolute…
  7. Nusselt number (NN) is given by
  8. The refrigerant used in small tonnage commercial machines (hermetically sealed units) is
  9. The dry bulb temperature during sensible heating of air
  10. In vapour compression cycle the condition of refrigerant is superheated vapour
  11. Ammonia absorption refrigeration cycle requires
  12. A vapour absorption refrigerator uses __________ as a refrigerant.
  13. An important characteristic of absorption system of refrigeration is
  14. The relative humidity lines on a psychrometric chart are
  15. Environmental protection agencies advice against the use of chlorofluorocarbon refrigerants since
  16. The C.O.P. of a refrigeration cycle with lowering of condenser temperature, keeping the evaporator temperature…
  17. In a vapour compression refrigeration system, a throttle valve is used in place of an expander because
  18. In which of the following refrigeration system, waste heat can be effectively used?
  19. The air cooling system mostly used in transport type aircrafts is
  20. The relative coefficient of performance is equal to
  21. The cooling system used for supersonic aircrafts and rockets is
  22. In aqua ammonia and Lithium bromide water absorption refrigeration systems, the refrigerants are respectively
  23. The bypass factor, in case of sensible cooling of air, is given by (where td₁ = Dry bulb temperature…
  24. The mass of water vapour present in __________ is called absolute humidity.
  25. As relative humidity decreases, the dew point temperature will be ________ wet bulb temperature.
  26. The freezing point of R-12 is
  27. Critical pressure of a liquid is the pressure
  28. The humidity ratio or specific humidity is the mass of water vapour present in
  29. The relative coefficient of performance is
  30. The reduced ambient air cooling system has