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The boiling point of ammonia is

A. 100°C

B. 50°C

C. 33.3°C

D. 0°C

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  1. In a refrigeration system, the expansion device is connected between the
  2. In a reversed Brayton cycle, the heat is absorbed by the air during
  3. The leaks in a refrigeration system using Freon are detected by
  4. In a vapour compression system, the condition of refrigerant before passing through the condenser is
  5. Ammonia absorption refrigeration cycle requires
  6. An evaporator is also known as
  7. Wet bulb temperature is the temperature of air recorded by a thermometer, when
  8. Carbon dioxide is
  9. The wet bulb temperature during sensible heating of air
  10. The condensing pressure due to the presence of non-condensable gases, as compared to that actually required…
  11. The dry bulb temperature during sensible heating of air
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  13. During dehumidification process, the relative humidity
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  15. Refrigeration in aeroplanes usually employs the following refrigerant
  16. The higher temperature in vapour compression cycle occurs at
  17. The freezing point of R-12 is
  18. In vapour compression cycle, the condition of refrigerant is very wet vapour
  19. A refrigerant compressor is used to
  20. Which of the following refrigerant has the lowest freezing point?
  21. The total pressure exerted by the mixture of air and water vapour is equal to the sum of pressures which…
  22. An infinite parallel planes with emissivities e₁ and e₂, the interchange factor for radiation…
  23. In a spray washing system, if the temperature of water is higher than the dry bulb temperature of entering…
  24. One ton of refrigeration is equal to the refrigeration effect corresponding to melting of 1000 kg of…
  25. Allowable pressure on high pressure side or ammonia absorption system is of the order of
  26. The centrifugal compressors are generally used for refrigerants that require
  27. The thermostatic expansion valve is also called
  28. Aqua ammonia is used as refrigerant in the following type of refrigeration system
  29. A Bell Coleman refrigerator working on dense air system as compared to open air system, for the same…
  30. The thermal diffusivity for gases is generally __________ those for liquids.