Related Questions

The forces causing the vaporisation of liquid are derived from the Kinetic energy of translation of its molecules. The heat of vaporisation
A Increases with pressure rise
B Decreases with increasing pressure
C Becomes zero at the critical point
D Both B & C
During adiabatic saturation process on unsaturated air __________ remains constant.
A Relative humidity
B Dew point temperature
C Dry bulb temperature
D Wet bulb temperature
__________ remains constant during the adiabatic cooling of moist air.
A Wet bulb temperature
B Dry bulb temperature
C Relative humidity
D Specific humidity
Which of the following parameters remains almost constant during adiabatic saturation of unsaturated air?
A Dry bulb temperature
B Dew point
C Wet bulb temperature
D None of these
During constant rate drying period, vaporisation rate per unit drying surface area
A Decreases with time
B Increases with time
C Does not change with time
D Does not affect the moisture content of the wet solid
Steady state temperature reached by a small amount of liquid evaporating into a large amount of unsaturated vapour-gas mixture is called the __________ temperature.
A Dry-bulb
B Wet-bulb
C Dew point
D Adiabatic saturation
__________ temperature is the steady state temperature attained by a small amount of liquid evaporating into a large quantity of unsaturated gas-vapor mixture.
A Dry bulb
B Wet bulb
C Dew point
D None of these
For the air water system under ambient conditions, the adiabatic saturation temperature and the wet bulb temperature are nearly equal, because
A Water has a high latent heat of evaporation
B Lewis number is close to unity
C They are always equal under all circumstances
D Solubility of the components of air in water is very small
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 heat of vaporisation __________ with increase in pressure.
A Increases
B Decreases
C Becomes zero at critical pressure
D Both B and C

Next steps