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

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

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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

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

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Refrigeration and Air Conditioning
A thermostatic expansion valve in a refrigeration system

Is suitable only for constant load systems
Ensures the evaporator completely filled with refrigerant of the load
Maintains different temperatures in evaporator in proportion to load
None of these

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