Refrigeration and Air Conditioning
Critical pressure of a liquid is the pressure

Above which liquid becomes gas
Above which liquid becomes solid
Above which liquid becomes vapour
Above which liquid will remain liquid

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Refrigeration and Air Conditioning
The bypass factor, in case of sensible cooling of air, is given by (where td₁ = Dry bulb temperature of air entering the cooling coil, td₂ = Dry bulb temperature of air leaving the cooling coil, and td₃ = Dry bulb temperature of the cooling coil)

(td₃ -td₁)/( td₂ -td₃)
(td₂ -td₃)/( td₁ -td₃)
(td₁ -td₃)/( td₂ -td₃)
(td₃ -td₂)/( td₁ -td₃)

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Refrigeration and Air Conditioning
The bypass factor of a cooling coil decreases with

Increase in fin spacing and decrease in number of rows
Decrease in fin spacing and increase in number of rows
Increase in fin spacing and increase in number of rows
Decrease in fin spacing and decrease in number of rows

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