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In vapour compression cycle using NH₃ as refrigerant, initial charge is filled at

A. Suction of compressor

B. Delivery of compressor

C. High pressure side close to receiver

D. Low pressure side near receiver

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  1. The operating pressure for refrigerating units using R-12 as a refrigerant is
  2. Air refrigeration cycle is used in
  3. On the pressure-enthalpy diagram, condensation and desuperheating is represented by a horizontal line…
  4. In which of the following refrigeration system, waste heat can be effectively used?
  5. Degree of saturation or percentage humidity is
  6. The undesirable property of a refrigerant is
  7. In a spray washing system, if the temperature of water is higher than the dry bulb temperature of entering…
  8. During dehumidification process, __________ remains constant.
  9. The refrigerant supplied to a compressor must be
  10. Air conditioning means
  11. Which of the following statement is correct?
  12. A refrigerating system operating on reversed Brayton refrigeration cycle is used for maintaining 250…
  13. The lowest temperature during the cycle in a vapour compression system occurs after
  14. Pressure of water vapour is given by
  15. For large tonnage (more than 200 TR) air-conditioning applications, the compressor recommended is
  16. One ton refrigeration corresponds to
  17. The dry bulb temperature lines, on the psychrometric chart are
  18. The atmospheric air at dry bulb temperature of 15°C enters a heating coil maintained at 40°C.…
  19. Vapour compression refrigeration is somewhat like
  20. For proper refrigeration in a cabinet, if the temperature and vapour pressure difference between cabinet…
  21. An evaporator is also known as
  22. During sensible heating of air _________ decreases.
  23. The operating temperature of a cold storage is 2°C. The heat leakage from the surrounding is 30…
  24. Presence of moisture in a refrigerant affects the working of
  25. The central air conditioning system has ________ overall efficiency as compared to individual systems.
  26. A reversible engine has ideal thermal efficiency of 30%. When it is used as a refrigerating machine…
  27. Relative humidity is given by (where pv = Partial pressure of water vapour, pb = Barometric pressure,…
  28. In a psychrometric chart, specific humidity (moisture content) lines are
  29. The leakage in a refrigeration system using Freon is detected by
  30. Which of the following refrigerant has the highest freezing point.