Mechanical Engineering - Heat Transfer, Refrigeration and Air Conditioning - Discussion

39. 

Degree of saturation or percentage humidity is

[A]. the mass of water vapour present in 1 m3 of dry air
[B]. the mass of water vapour present in 1 kg of dry air
[C]. the ratio of the actual mass of water vapour in a unit mass of dry air to the mass of water vapour in the same mass of dry air when it is saturated at the same temperature and pressure.
[D]. the ratio of actual mass of water vapour in a given volume of moist air to the mass of water vapour in the same volume of saturated air at the same temperature and pressure

Answer: Option C

Explanation:

No answer description available for this question.

Payal Modi said: (Dec 9, 2014)  
Same as that of relative humidity.

Lambo said: (Apr 9, 2017)  
@Payal.

Degree of saturation not same as Relative humidity.

The Degree of saturation is the ratio of humidity of moist air to the humidity of saturated moist air.

Relative humidity is the ratio of partial pressure of water vapour to the equilibrium water vapour pressure.

i.e. Option C is correct for Degree of Saturation and Option D correct for Relative Humidity.

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