Refrigeration and Air Conditioning
During heating and humidification, the final relative humidity of air

None of the listed here
Can be lower or higher than that of the entering air
Is higher than that of the entering air
Is lower than that of the entering air

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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)

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

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

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

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Refrigeration and Air Conditioning
In a lithium bromide absorption refrigeration system

Water is used as a refrigerant and lithium bromide as an absorbent
Lithium bromide is used as a refrigerant and water as an absorbent
None of these
Ammonia is used as a refrigerant and lithium bromide as an absorbent

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