Degree of saturation or percentage humidity is

A The mass of water vapour present in 1 m<sup>3</sup> 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

Correct Answer: 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

Degree of saturation or percentage humidity is, 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.
Bissoy MCQ
#Mechanical Engineering #Refrigeration and Air Conditioning

Related Questions

Humidity chart is useful for the solution of problems concerning condensation, vaporisation and air conditioning. At a given dry bulb temperature, value of humidity obtained from the humidity chart directly, is in terms of __________ humidity.
A Molal
B Relative
C Percentage
D None of these
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A Zero
B Hundred
C Both zero and hundred
D None of these
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A Higher than
B Smaller than
C Equal to
D Either A or B; depends on the system
In case of an unsaturated mixture of gas and vapor, the percentage saturation is __________ its relative saturation.
A Lower than
B Higher than
C Equal to
D Either A or B, depends on the mixture composition
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A Always smaller than
B Always greater than
C Not related to
D None of these
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A 2 : 1
B 3 : 1
C 4 : 1
D 5 : 1
Valid range for S, the degree of saturation of soil in percentage is
A S > 0
B S
C 0
D 0 ≤ S ≤ 100
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A Temperature rises
B Pressure rises
C Temperature falls
D Pressure falls
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A 100
B 0
C 50
D Between 0 and 100
Critical humidity of a solid salt means the humidity
A Above which it will always become damp
B Below which it will always stay dry
C Both A and B
D Above Which it will always become dry and below which it will always stay damp

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