Related Questions

When the __________ the relative humidity of air decreases, despite an increase in the absolute humidity.
A Temperature rises
B Pressure rises
C Temperature falls
D Pressure falls
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
The percentage humidity is less than the relative humidity only at __________ percent humidity.
A Zero
B Hundred
C Both zero and hundred
D None of these
With increase in absolute humidity, the dew point of an unsaturated mixture of air and water vapor (at constant pressure and temperature)
A Increases
B Remains unchanged
C Decreases
D Decreases linearly
As relative humidity decreases, the dew point temperature will be ________ wet bulb temperature.
A Same as
B Lower than
C Higher than
D None of these
The index which correlates the combined effects of air temperature, relative humidity and air velocity on the human body, is known as
A Mean radiant temperature
B Effective temperature
C Dew point temperature
D None of these
The wet bulb temperature is lower in dry air than in wet air at the same temperature. A dry bulb thermometer registers a higher temperature than a wet bulb thermometer except at __________ percent relative humidity.
A 0
B 100
C 50
D None of these
During heating and humidification, the final relative humidity of air
A Can be lower or higher than that of the entering air
B Is lower than that of the entering air
C Is higher than that of the entering air
D None of the above
The instrument used for measuring relative humidity in air is ________
A Hygrometer
B Hydrograph
C Pantograph
D Barograph
The comfort conditions in air conditioning are at (where DBT = Dry bulb temperature, and RH = Relative humidity)
A 25°C DBT and 100% RH
B 20°C DBT and 80% RH
C 22°C DBT and 60% RH
D 25°C DBT and 40% RH

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