The ratio of the actual mass of water vapour in a unit mass of dry air to the mass of water vapour in the same mass of dry air when it is saturated at the same temperature and pressure, is called

A. Humidity ratio

B. Relative humidity

C. Absolute humidity

D. Degree of saturation

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  1. The cooling system used for supersonic aircrafts and rockets is
  2. In larger industrial and commercial reciprocating compression systems, refrigerant widely used is
  3. In a refrigeration system, the expansion device is connected between the
  4. A mixture of dry air and water vapour, when the air has diffused the maximum amount of water vapour…
  5. Which of the following cycles uses air as the refrigerant?
  6. An evaporator is also known as
  7. The bank of tubes at the back of domestic refrigerator is
  8. The formation of frost on cooling coils in a refrigerator
  9. The specific humidity during heating and humidification process.
  10. The process, generally used in winter air-conditioning to warm and humidity the air, is called
  11. Pressure of water vapour is given by
  12. Under cooling in a refrigeration cycle
  13. The suction pipe diameter of refrigerating unit compressor in comparison to delivery side is
  14. The specific humidity during humidification process
  15. The refrigerant used in small tonnage commercial machines (hermetically sealed units) is
  16. Which of the following refrigerant is highly toxic and flammable?
  17. The centrifugal compressors are generally used for refrigerants that require
  18. The boiling point of carbon dioxide is
  19. The bypass factor, in case of sensible cooling of air, is given by (where td₁ = Dry bulb temperature…
  20. In aqua ammonia absorption refrigeration system, incomplete rectification leads to accumulation of water…
  21. Ammonia absorption refrigeration cycle requires
  22. In a refrigeration system, heat absorbed in comparison to heat rejected is
  23. The vertical and uniformly spaced lines on a psychrometric chart indicates
  24. The moisture in a refrigerant is removed by
  25. A refrigeration cycle operates between condenser temperature of + 27°C and evaporator temperature…
  26. Which of the following refrigerant has the lowest boiling point?
  27. The freezing point of sulphur dioxide is
  28. The capacity of a domestic refrigerator is in the range of
  29. In a psychrometric chart, specific humidity (moisture content) lines are
  30. Allowable pressure on high pressure side or ammonia absorption system is of the order of