51.
The leakage in a refrigeration system using ammonia is detected by

52.
The lower horizontal line of the refrigeration cycle plotted on pressure-enthalpy diagram represents

53.
Which of the following refrigerant is highly toxic and flammable?

54.
The wet bulb depression indicates _________ humidity of the air.

55.
In case of sensible cooling of air, the coil efficiency is given by

56.
The specific humidity during dehumidification process

57.
The specific humidity during humidification process

58.
The ratio of heat extracted in the refrigerator to the work-done on the refrigerant is called

59.
The material of pipe lines for a system using Freon as a refrigerant should be

60.
The vapour pressure of refrigerant should be

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