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In a reversed Brayton cycle, the heat is absorbed by the air during

A. Isentropic compression process

B. Constant pressure cooling process

C. Isentropic expansion process

D. Constant pressure expansion process

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  1. The wet bulb temperature during sensible heating of air
  2. During sensible cooling of air ________ decreases.
  3. For obtaining high COP, the pressure range of compressor should be
  4. Which of the following statement is wrong?
  5. During sensible cooling,
  6. R-12 is generally preferred over R-22 in deep freezers since
  7. In vapour compression cycle, the condition of refrigerant is very wet vapour
  8. During humidification process, dry bulb temperature
  9. During sensible cooling of air, specific humidity
  10. Air refrigeration cycle is used in
  11. In a saturated air-water vapour mixture, the
  12. A one tonne refrigerating machine means that
  13. The desirable property of a refrigerant is
  14. Vertical lines on pressure-enthalpy chart show constant
  15. In a refrigeration system, heat absorbed in comparison to heat rejected is
  16. Which of the following is not a desirable property of a refrigerant?
  17. In a vapour compression refrigeration system, a throttle valve is used in place of an expander because
  18. When the lower temperature of a refrigerating machine is fixed, then the coefficient of performance…
  19. The atmospheric air at dry bulb temperature of 15°C enters a heating coil maintained at 40°C.…
  20. A good refrigerant should have
  21. On the pressure-enthalpy diagram, condensation and desuperheating is represented by a horizontal line…
  22. Reducing suction pressure in refrigeration cycle
  23. A standard ice point temperature corresponds to the temperature of
  24. A valve which maintains a constant degree of superheat at the end of the evaporator coil, is called
  25. Environmental protection agencies advice against the use of chlorofluorocarbon refrigerants since
  26. The wet bulb depression is zero when relative humidity is
  27. The boiling point of ________ is 10.5°C.
  28. In refrigerators, the temperature difference between the evaporating refrigerant and the medium being…
  29. The refrigerant supplied to a compressor must be
  30. In case of sensible heating of air, the coil efficiency is given by (where B.P.F. = Bypass factor)