Refrigeration and Air Conditioning
When the air is passed through an insulated chamber having sprays of water maintained at a temperature higher than the dew point temperature of entering air but lower than its dry bulb temperature, then the air is said to be

Heated and humidified
Cooled and humidified
Heated and dehumidified
Cooled and dehumidified

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Refrigeration and Air Conditioning
Which of the following statement is correct?

The wet bulb and dry bulb temperature are equal at saturation condition
The constant enthalpy lines are also constant wet bulb temperature lines
The wet bulb temperature is a measure of enthalpy of moist air
All of the listed here

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

Its bulb is surrounded by a wet cloth exposed to the air
None of the listed here
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
The relative humidity is defined as

The ratio of the actual mass of water vapour in a unit mass of dry air to the mass of water vapour in the same mass of dry air when it is saturated at the same temperature and pressure
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
The mass of water vapour present in 1 m3 of dry air
The mass of water vapour present in 1 kg of dry air

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