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This quiz contains multiple-choice problems on humidification operations and gas-vapour mixtures.
Humidification is a
Mass absolute humidity is
Absolute humidity
Grosvenor humidity
Relative humidity
All of the above
By differencing the temperature, the heat added or removed is called
Sensible heat
Latent heat
Heat of vaporization
None of the above
Humidity is represented in
Humidity chart
Psychometric chart
Psychometric chart or humidity chart
All of the above
De-humidification is done in
Adiabatic temperature
Adiabatic saturated temperature
Adiabatic unsaturated temperature
None of the above
The system is unsaturated if partial pressure __ equilibrium vapour pressure.
Is less than
Is greater than
Equals to
All of the above
For an air(A)-water vapour(B) mixture, the partial pressure of the air is 5 Pa, and the total pressure of the system is 15 Pa. The molal absolute humidity is
0.5
1
1.5
2
At the gas temperature, the liquid is in equilibrium with vapour for
Saturated gas
Unsaturated gas
Partially saturated gas
None of the above
Consider a saturated gas(A)-water vapour(B) mixture. If the absolute molal humidity is 0.265 and the total pressure is 760 mmHg, find the vapour pressure of B.
149.21 mmHg
159.21 mmHg
169.21 mmHg
600.8 mmHg
What is the saturated molar absolute humidity of the gas(A)-water vapour(B) mixture at 100 °C (given the vapour pressure of A is 300 mmHg and the total pressure is 760 mmHg)?
0.39
0.65
0.60
Cannot determine
For an air(A)-water vapour(B) mixture, the partial pressure of the air is 5 Pa, and the total pressure of the system is 15 Pa. The absolute humidity in mass of air/mass of water vapour is therefore
0.311
0.805
0.705
0.411
Enthalpy is similar throughout the initial and final conditions in a particular kind of operation. These operations are called
Non-adiabatic
Adiabatic
Isothermal
Non-isothermal
Partial pressure equals vapour pressure if it is
Isothermal
Unsaturated
Saturated
None of the above
The vapour pressure of the nitrogen gas is 400 mmHg and the partial pressure is 300 mmHg. Find the relative saturation.
75
133
100
50
In humidification, the gas is __ in the liquid for the mass transfer.
Soluble
Insoluble
Partially soluble
Inert
