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Chaperon equation is a relation between

A. Temperature, pressure and enthalpy

B. Specific volume and enthalpy

C. Temperature and enthalpy

D. Temperature, pressure, specific volume and enthalpy

Correct Answer : D.


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  1. Degree of saturation or percentage humidity is
  2. Moisture should be removed from refrigerants to avoid
  3. The lowest thermal diffusivity is of
  4. The domestic refrigerator uses following type of compressor
  5. The refrigerant after condensation process is cooled below the saturation temperature before throttling.…
  6. Bell Coleman cycle is a
  7. The process, generally used in summer air conditioning to cool and dehumidify the air, is called
  8. At lower temperatures and pressures, the latent heat of vaporisation of a refrigerant
  9. The coefficient of performance of a domestic refrigerator is ________ as compared to a domestic air-conditioner.
  10. During a refrigeration cycle, heat is rejected by the refrigerant in a
  11. The pressure at the inlet of a refrigerant compressor is called
  12. The value of C.O.P in vapour compression cycle is usually
  13. The C.O.P of a refrigeration cycle with increase in evaporator temperature, keeping condenser temperature…
  14. The condition of refrigerant after passing through the expansion or throttle valve, in a vapour compression…
  15. The bypass factor (B. P. F.) in case of sensible heating of air is (Where td₁ = Dry bulb temperature…
  16. During heating and dehumidification process, dry bulb temperature
  17. In a refrigerating machine, heat rejected is _________ heat absorbed.
  18. The relative humidity is defined as
  19. Carbon dioxide is
  20. Which of the following statement is correct?
  21. Which of the following statement is correct for ammonia as a refrigerant?
  22. In vapour compression cycle, the condition of refrigerant is very wet vapour
  23. Most thermostatic expansion valves are set for a superheat of
  24. The thermal diffusivity for gases is generally __________ those for liquids.
  25. The change in evaporator temperature in a refrigeration cycle, as compared to change in condenser temperature,…
  26. Pick up the correct statement about giving up of heat from one medium to other in ammonia absorption…
  27. The C.O.P. of a refrigeration cycle with lowering of condenser temperature, keeping the evaporator temperature…
  28. The COP of a domestic refrigerator
  29. Short horizontal lines on pressure-enthalpy chart show
  30. The dry bulb temperature during sensible heating of air