The capillary tube, as an expansion device, is used in

A. Domestic refrigerators

B. Water coolers

C. Room air conditioners

D. All of these

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  1. One ton of refrigeration is equal to the refrigeration effect corresponding to melting of 1000 kg of…
  2. The refrigerant used in small tonnage commercial machines (hermetically sealed units) is
  3. The emissivity of a polished silver body is __________ as compared to black body.
  4. The central air conditioning system has ________ overall efficiency as compared to individual systems.
  5. The refrigerant supplied to a compressor must be
  6. Formation of frost on evaporator in refrigerator
  7. Dry bulb temperature is the temperature of air recorded by a thermometer, when
  8. Refrigeration in aeroplanes usually employs the following refrigerant
  9. The evaporator changes the low pressure liquid refrigerant from the expansion valve into
  10. In a psychrometric chart, specific humidity (moisture content) lines are
  11. For obtaining high COP, the pressure range of compressor should be
  12. The minimum temperature to which water can be cooled in a cooling tower is
  13. The lowest thermal diffusivity is of
  14. The temperature of air recorded by a thermometer, when it is not affected by the moisture present in…
  15. The coefficient of performance of Heat Pump is always __________ one.
  16. The bypass factor (B. P. F.) in case of sensible heating of air is (Where td₁ = Dry bulb temperature…
  17. The coefficient of performance is the ratio of the refrigerant effect to the
  18. The centrifugal compressors are generally used for refrigerants that require
  19. In a reversed Brayton cycle, the heat is absorbed by the air during
  20. An Electrolux refrigerator is called a __________ absorption system.
  21. The curved lines on a psychrometric chart indicates
  22. During sensible cooling of air ________ decreases.
  23. Moisture in Freon refrigeration system causes
  24. The general rule for rating refrigeration systems (excepting for CO₂ system) is to approximate…
  25. Which of the following refrigerant has the maximum ozone depletion potential in the stratosphere?
  26. The thermostatic expansion valve operates on the changes in the
  27. For ammonia refrigerating systems, the tubes of a shell and tube condenser are made of
  28. The desirable property of a refrigerant is
  29. The coefficient of performance (C.O.P.) of a refrigerator working as a heat pump is given by
  30. The lowest temperature during the cycle in a vapour compression system occurs after