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

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

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Refrigeration and Air Conditioning
A one tonne refrigerating machine means that

One tonne refrigerant is used
One tonne is the total mass of machine
One tonne of water can be converted into ice
One tonne of ice when melts from and at 0° C in 24 hours, the refrigeration effect is equivalent to 210 kJ/min

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