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Short horizontal lines on pressure-enthalpy chart show

A. Constant pressure lines

B. Constant temperature lines

C. Constant total heat lines

D. Constant entropy lines

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  1. In a saturated air-water vapour mixture, the
  2. The wet bulb temperature during sensible cooling of air
  3. A refrigerating system operating on reversed Brayton refrigeration cycle is used for maintaining 250…
  4. The temperature of ammonia after compression in a vapour compression system is
  5. On the pressure-enthalpy diagram, condensation and desuperheating is represented by a horizontal line…
  6. In a lithium bromide absorption refrigeration system
  7. The condition of refrigerant after passing through the condenser in a vapour compression system is
  8. Which of the following statement is correct?
  9. Vapour compression refrigeration is somewhat like
  10. If a heat pump cycle operates between the condenser temperature of +27°C and evaporator temperature…
  11. Carbon dioxide is
  12. The superheating in a refrigeration cycle
  13. The refrigerant widely used in domestic refrigerators is
  14. The condensing pressure due to the presence of non-condensable gases, as compared to that actually required…
  15. In chemical dehumidification process,
  16. Which of the following statement is wrong?
  17. For better C.O.P of refrigerator, the pressure range corresponding to temperature in evaporator and…
  18. Formation of frost on evaporator in refrigerator
  19. The wet bulb temperature during sensible heating of air
  20. The leaks in a refrigeration system using Freon are detected by
  21. The suction pipe diameter of refrigerating unit compressor in comparison to delivery side is
  22. The bypass factor, in case of sensible cooling of air, is given by (where td₁ = Dry bulb temperature…
  23. The desirable property of a refrigerant is
  24. The COP of a domestic refrigerator
  25. Which of the following is not a desirable property of a refrigerant?
  26. In a domestic refrigerator, a capillary tube controls the flow of refrigerant from the
  27. The reduced ambient air cooling system has
  28. The process, generally used in summer air conditioning to cool and dehumidify the air, is called
  29. In a psychrometric process, the sensible heat added is 30 kJ/s and the latent heat added is 20 kJ/s.…
  30. The coefficient of performance (C.O.P.) of a refrigerator working as a heat pump is given by