Refrigeration and Air Conditioning
The sensible heat factor during the heating and humidification process is given by (where h₁ = Enthalpy of air entering the heating coil, h₂ = Enthalpy of air leaving the heating coil, and hA = Enthalpy of air at the end of humidification process)

(h1 - h2)/ (hA - h2)
(hA - h1)/ (h2 - h1)
(hA - h2)/ (h1 - h2)
(h2 - hA)/ (h1 - h2)

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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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