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

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

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Refrigeration and Air Conditioning
For proper refrigeration in a cabinet, if the temperature and vapour pressure difference between cabinet and atmosphere is high, then

Refrigerant with lower evaporation temperature should be used
Perfectly tight vapour seal should be used
Bigger cabinet should be used
Smaller cabinet should be used

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