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
Absolute humidity
Humidity ratio
Relative humidity

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Refrigeration and Air Conditioning
The reciprocating refrigerant compressors are very suitable for

Small displacements and high condensing pressures
Large displacements and low condensing pressures
Small displacements and low condensing pressures
Large displacements and high condensing pressures

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