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In air-conditioning of aeroplanes, using air as a refrigerant, the cycle used is

A. Reversed Carnot cycle

B. Reversed Joule cycle

C. Reversed Brayton cycle

D. Reversed Otto cycle

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  2. Which of the following statement is wrong?
  3. A certain refrigerating system has a normal operating suction pressure of 10 kg/cm gauge and condensing…
  4. Which of the following statement is wrong?
  5. The vapour compression refrigerator employs the following cycle
  6. During heating and dehumidification process, dry bulb temperature
  7. In a psychrometric process, the sensible heat added is 30 kJ/s and the latent heat added is 20 kJ/s.…
  8. Superheating in a refrigeration cycle
  9. During cooling and dehumidification, dry bulb temperature
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  11. The leakage in a refrigeration system using Freon is detected by
  12. Absorption system normally uses the following refrigerant
  13. In a spray washing system, if the temperature of water is higher than the dry bulb temperature of entering…
  14. An Electrolux refrigerator is called a __________ absorption system.
  15. Air conditioning means
  16. R-12 is generally preferred over R-22 in deep freezers since
  17. Which of the following refrigerant has the highest freezing point.
  18. Pick up the wrong statement. A refrigerant should have
  19. Chaperon equation is a relation between
  20. A condenser of refrigeration system rejects heat at the rate of 120 kW, while its compressor consumes…
  21. The advantage of dry compression is that
  22. The material of pipe lines for a system using Freon as a refrigerant should be
  23. In a vapour compression refrigeration system, a throttle valve is used in place of an expander because
  24. A human body feels comfortable when the heat produced by the metabolism of human body is equal to the
  25. The heat rejection factor (HRF) is given by
  26. During humidification process, __________ increases.
  27. Bell Coleman cycle is a
  28. The index which correlates the combined effects of air temperature, relative humidity and air velocity…
  29. The unit of thermal diffusivity is
  30. Nusselt number (NN) is given by