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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
The boiling point of ammonia is

-77.7°C
-33.3°C
-10.5°C
-30°C

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Refrigeration and Air Conditioning
A condenser of refrigeration system rejects heat at the rate of 120 kW, while its compressor consumes a power of 30 kW. The coefficient of performance of the system will be

3
43834
4
43833

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Refrigeration and Air Conditioning
The difference between dry bulb temperature and wet bulb temperature, is called

Wet bulb depression
Dew point depression
Dry bulb depression
Degree of saturation

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Refrigeration and Air Conditioning
The lowest temperature during the cycle in a vapour compression system occurs after

Compression
Condensation
Evaporation
Expansion

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Refrigeration and Air Conditioning
Moisture in Freon refrigeration system causes

Ineffective refrigeration
High power consumption
Corrosion of whole system
Freezing automatic regulating valve

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Refrigeration and Air Conditioning
In S.J. unit, one ton of refrigeration is equal to

21 kJ/ min
420 kJ/ min
840 kJ/ min
210 kJ/ min

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