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Refrigeration and Air Conditioning

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

43834
4
3
43833

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Refrigeration and Air Conditioning
During a refrigeration cycle, heat is rejected by the refrigerant in a

Condenser
Compressor
Evaporator
Expansion valve

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Refrigeration and Air Conditioning
The refrigerant supplied to a compressor must be

Dry saturated liquid refrigerant
A mixture of liquid and vapour refrigerant
None of these
Superheated vapour refrigerant

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Refrigeration and Air Conditioning
The emissivity of a polished silver body is ____ as compared to black body.

Same
Low
Very low
High

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Refrigeration and Air Conditioning
The freezing point of sulphur dioxide is

-75.2°C
-135.8°C
-56.6°C
-77.7°C

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Refrigeration and Air Conditioning
The curved lines on a psychrometric chart indicates

Relative humidity
Dry bulb temperature
Dew point temperature
Wet bulb temperature

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