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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
Allowable pressure on high pressure side or ammonia absorption system is of the order of

Slightly above atmospheric pressure
Atmospheric pressure
56 bars
24 bars

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Refrigeration and Air Conditioning
The comfort conditions in air conditioning are at (where DBT = Dry bulb temperature, and RH = Relative humidity)

22°C DBT and 60% RH
25°C DBT and 100% RH
20°C DBT and 80% RH
25°C DBT and 40% RH

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Refrigeration and Air Conditioning
The specific humidity during dehumidification process

Remains constant
Decreases
None of these
Increases

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Refrigeration and Air Conditioning
Highest temperature encountered in refrigeration cycle should be

At critical Temperature
Above critical temperature
Near critical temperature of refrigerant
Much below critical temperature

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Refrigeration and Air Conditioning
One of the purposes of sub cooling the liquid refrigerant is to

Increase cooling effect
Reduce compressor discharge temperature
Reduce compressor overheating
Ensure that only liquid and not the vapour enters the expansion (throttling) valve

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Refrigeration and Air Conditioning
The dehumidification process, on the psychrometric chart, is shown by

Horizontal line
Curved line
Inclined line
Vertical line

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