The value of C.O.P in vapour compression cycle is usually

A. Always less than unity

B. Always more than unity

C. Equal to unity

D. Any one of the above

Please do not use chat terms. Example: avoid using "grt" instead of "great".

You can do it
  1. The advantage of dry compression is that
  2. During a refrigeration cycle, heat is rejected by the refrigerant in a
  3. A Bell Coleman refrigerator working on dense air system as compared to open air system, for the same…
  4. The lower horizontal line of the refrigeration cycle plotted on pressure-enthalpy diagram represents
  5. At lower temperatures and pressures, the latent heat of vaporisation of a refrigerant
  6. The refrigeration effect in a dry evaporator compared to flooded evaporator in a similar plant is
  7. During sensible cooling,
  8. The coefficient of performance is the ratio of the refrigerant effect to the
  9. For unsaturated air, the dew point temperature is __________ wet bulb temperature.
  10. The mass of water vapour present in __________ is called absolute humidity.
  11. In order to cool and dehumidify a stream of moist air, it must be passed over the coil at a temperature
  12. In refrigerators, the temperature difference between the evaporating refrigerant and the medium being…
  13. The wet bulb temperature at 100% relative humidity is ________ dry bulb temperature.
  14. Ammonia is
  15. The superheated vapour region, in a pressure enthalpy chart, is represented by the space
  16. One ton refrigeration corresponds to
  17. The emissivity of a polished silver body is __________ as compared to black body.
  18. The evolution of heat of solution takes place in ammonia absorption plant when
  19. The specific humidity during heating and humidification process.
  20. The index which correlates the combined effects of air temperature, relative humidity and air velocity…
  21. The boiling point of carbon dioxide is
  22. Efficiency of a Carnot engine is given as 80%. If the cycle direction be reversed, what will be the…
  23. Highest temperature encountered in refrigeration cycle should be
  24. Aqua ammonia is used as refrigerant in the following type of refrigeration system
  25. Which of the following refrigerant has the lowest freezing point?
  26. A human body feels comfortable when the heat produced by the metabolism of human body is equal to the
  27. A heat pump working on a reversed Carnot cycle has a C.O.P. of 5. It works as a refrigerator taking…
  28. One ton of refrigeration is equal to the refrigeration effect corresponding to melting of 1000 kg of…
  29. The value of C.O.P in vapour compression cycle is usually
  30. A vapour absorption refrigeration system