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The leakage in a refrigeration system using ammonia is detected by

A. Halide torch

B. Sulphur sticks

C. Soap and water

D. All of these

Correct Answer : B.


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  1. The horizontal and non-uniformly spaced lines on a psychrometric chart indicates
  2. Relative humidity is given by (where pv = Partial pressure of water vapour, pb = Barometric pressure,…
  3. The C.O.P. of a Carnot refrigerator in winter will be _________ as compared to C.O.P. in summer.
  4. The emissivity of a polished silver body is __________ as compared to black body.
  5. As relative humidity decreases, the dew point temperature will be ________ wet bulb temperature.
  6. Ammonia absorption refrigeration cycle requires
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  8. In vapour compression cycle the condition off refrigerant is dry saturated vapour
  9. A refrigerant compressor is used to
  10. In order to collect liquid refrigerant and to prevent it from going to a ________, a device known as…
  11. The C.O.P. of a heat pump working on a reversed Carnot cycle is
  12. The superheated vapour region, in a pressure enthalpy chart, is represented by the space
  13. The capillary tube is not used in large capacity refrigeration systems because
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  16. In vapour compression cycle the condition of refrigerant is superheated vapour
  17. The difference between dry bulb temperature and dew point temperature, is called
  18. If the evaporator temperature of a plant is lowered, keeping the condenser temperature constant, the…
  19. The coefficient of performance (C.O.P.) of a refrigerator working as a heat pump is given by
  20. The dry bulb temperature during sensible heating of air
  21. In a refrigeration cycle, the flow of refrigerant is controlled by
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  23. In a reversed Brayton cycle, the heat is absorbed by the air during
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  25. Air refrigeration cycle is used in
  26. The comfort conditions in air conditioning are at (where DBT = Dry bulb temperature, and RH = Relative…
  27. An Electrolux refrigerator is called a __________ absorption system.
  28. The ratio of the actual mass of water vapour in a unit mass of dry air to the mass of water vapour in…
  29. One of the purposes of sub cooling the liquid refrigerant is to
  30. The coefficient of performance of a domestic refrigerator is ________ as compared to a domestic air-conditioner.