A. Decreases
B. Increases
C. Depends on the extent of heating
D. Remain unchanged
Related Mcqs:
- 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 - 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 - An air-water vapour mixture has a dry bulb temperature of 60°C and a dew point temperature of 40°C. The total pressure is 101.3 kPa and the vapour pressure of water at 40°C and 60°C are 7.30 kPa and 19.91 kPa respectively. The humidity of air sample expressed as kg of water vapour/kg of dry air is__________________?
A. 0.048
B. 0.079
C. 0.122
D. 0.152 - 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 - A mixture of 10% C6H6 vapour in air at 25°C and 750 mm Hg has a dew point of 20°C. Its dew point at 30°C and 700 mm Hg will be around _______________ °C?
A. 21.7
B. 20
C. 27.3
D. 18.7 - 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 - The relative humidity of air decreases in-spite of an increase in the absolute humidity, when the____________________?
A. Temperature rises
B. Pressure rises
C. Temperature falls
D. Pressure falls - 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 - At a fixed pressure, the humidity depends upon the partial pressure of vapor in the mixture. Humidity of a vapour free gas is ________________ percent.?
A. 100
B. 0
C. 50
D. Between 0 and 100 - Unsaturated air (with dry bulb temperature and dew point being 35°C and 18°C respectively) is passed through a water spray chamber maintained at 15°C. The air will be cooled_________________?
A. And humidified
B. And dehumidified with increase in wet bulb temperature
C. At the same relative humidity
D. And dehumidified with decrease in wet bulb temperature
