In a vapour compression refrigeration system, a throttle valve is used in place of an expander because

A. It considerably reduces mass of the system

B. It improves the C.O.P., as the condenser is small

C. The positive work in isentropic expansion of liquid is very small

D. It leads to significant cost reduction

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  1. The curved lines on a psychrometric chart indicates
  2. Vapour compression refrigeration is somewhat like
  3. Where does the lowest temperature occur in a vapour compression cycle?
  4. The domestic refrigerator uses following type of compressor
  5. If a gas is to be liquefied, its temperature must be
  6. In a vapour compression refrigeration system, a throttle valve is used in place of an expander because
  7. The general rule for rating refrigeration systems (excepting for CO₂ system) is to approximate…
  8. In case of sensible cooling of air, the coil efficiency is given by
  9. In a vapour absorption refrigeration system, the compressor of the vapour compression system is replaced…
  10. The C.O.P. of a Carnot refrigerator in winter will be _________ as compared to C.O.P. in summer.
  11. The relative humidity lines on a psychrometric chart are
  12. Accumulators should have adequate volume to store refrigerant charge at least
  13. Dry bulb temperature is the temperature of air recorded by a thermometer, when
  14. During adiabatic saturation process on unsaturated air __________ remains constant.
  15. A mixture of dry air and water vapour, when the air has diffused the maximum amount of water vapour…
  16. In aircraft, air refrigeration Cycle is used because of
  17. In vapour compression refrigeration system, refrigerant occurs as liquid between
  18. The temperature of air recorded by a thermometer, when its bulb is surrounded by a wet cloth exposed…
  19. The humidity ratio or specific humidity is the mass of water vapour present in
  20. In vapour compression cycle the condition off refrigerant is dry saturated vapour
  21. R-12 is generally preferred over R-22 in deep freezers since
  22. The bank of tubes at the back of domestic refrigerator is
  23. In a saturated air-water vapour mixture, the
  24. At lower temperatures and pressures, the latent heat of vaporisation of a refrigerant
  25. Moisture in Freon refrigeration system causes
  26. The heat rejection factor (HRF) is given by
  27. The thermostatic expansion valve is also called
  28. An evaporator is also known as
  29. The centrifugal compressors are generally used for refrigerants that require
  30. It is desired to condition the outside air from 70% relative humidity and 45° C dry bulb temperature…