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Aqua ammonia is used as refrigerant in the following type of refrigeration system

A. Compression

B. Direct

C. Indirect

D. Absorption

Correct Answer : D.


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  1. During sensible cooling of air, specific humidity
  2. In vapour compression cycle, the condition of refrigerant is very wet vapour
  3. The condition of refrigerant as it leaves the compressor in a vapour compression system is
  4. Which of the following refrigerant has the highest freezing point.
  5. Pick up the correct statement about giving up of heat from one medium to other in ammonia absorption…
  6. The refrigerant supplied to a compressor must be
  7. In a flooded evaporator refrigerator, an accumulator at suction of compressor is used to
  8. At lower temperatures and pressures, the latent heat of vaporisation of a refrigerant
  9. The wet bulb depression indicates _________ humidity of the air.
  10. An infinite parallel planes with emissivities e₁ and e₂, the interchange factor for radiation…
  11. In vapour compression refrigeration system, refrigerant occurs as liquid between
  12. The reduced ambient air cooling system has
  13. Which of the following refrigerant has the lowest freezing point?
  14. A refrigeration system
  15. The comfort conditions in air conditioning are at (where DBT = Dry bulb temperature, and RH = Relative…
  16. The C.O.P. of a refrigerator working on a reversed Carnot cycle is (where T₁ = Lowest absolute…
  17. Highest temperature encountered in refrigeration cycle should be
  18. Chaperon equation is applicable for registration at
  19. In aqua ammonia absorption refrigeration system, incomplete rectification leads to accumulation of water…
  20. The desirable property of a refrigerant is
  21. Rick up the incorrect statement
  22. The COP of a vapour compression plant in comparison to vapour absorption plant is
  23. The vapour pressure of refrigerant should be
  24. The condensing pressure due to the presence of non-condensable gases, as compared to that actually required…
  25. Air refrigeration cycle is used in
  26. The dry bulb temperature lines, on the psychrometric chart are
  27. In chemical dehumidification process,
  28. Vertical lines on pressure-enthalpy chart show constant
  29. Vapour compression refrigeration is somewhat like
  30. R-12 is generally preferred over R-22 in deep freezers since