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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
The value of C.O.P in vapour compression cycle is usually

Any one of the above
Always more than unity
Always less than unity
Equal to unity

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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

4
43833
43834
3

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Refrigeration and Air Conditioning
Wet bulb temperature is the temperature of air recorded by a thermometer, when

It is not affected by the moisture present in the air
The moisture present in it begins to condense
Its bulb is surrounded by a wet cloth exposed to the air
None of these

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Refrigeration and Air Conditioning
An important characteristic of absorption system of refrigeration is

quiet operation
cooling below 0°C
very little power consumption
noisy operation

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Refrigeration and Air Conditioning
The ratio of actual mass of water vapour in a given volume of moist air to the mass of water vapour in the same volume of saturated air at the same temperature and pressure, is called

Degree of saturation
Humidity ratio
Absolute humidity
Relative humidity

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

Relative humidity
Dew point temperature
Dry bulb temperature
Wet bulb temperature

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