Refrigeration and Air Conditioning
The process, generally used in winter air-conditioning to warm and humidity the air, is called

Cooling and dehumidification
Humidification
Dehumidification
Heating and humidification

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Refrigeration and Air Conditioning
A good refrigerant should have

Low C.O.P. and low freezing point
High operating pressures and low freezing point
High specific volume and high latent heat of vaporisation
High latent heat of vaporisation and low freezing point

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Refrigeration and Air Conditioning
In a lithium bromide absorption refrigeration system

None of these
Water is used as a refrigerant and lithium bromide as an absorbent
Lithium bromide is used as a refrigerant and water as an absorbent
Ammonia is used as a refrigerant and lithium bromide as an absorbent

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Refrigeration and Air Conditioning
It is desired to condition the outside air from 70% relative humidity and 45° C dry bulb temperature to 50% relative humidity and 25° C dry bulb temperature (room condition). The practical arrangement will be

Dehumidification
Cooling and humidification
Dehumidification and pure sensible cooling
Cooling and dehumidification

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