Search
.Management Sciences
Category: Mass Transfer
Unsaturated air (with dry bulb and wet bulb temperatures being 45°C and 25°C respectively) is passed through a water spray chamber maintained at 23°C. The air will be cooled and _________________?
0
A. Humidified with wet bulb temperature decreasing
B. Humidified at constant wet bulb temperature
C. Dehumidified
D. None of these
Total reflux in a distillation operation requires minimum____________________?
A. Reboiler load
B. Number of plates
C. Condenser load
D. All A., B. and C.
In Azeotropic mixture, the equilibrium vapour composition is____________________?
A. More than liquid composition
B. Less than liquid composition
C. Same as liquid composition
D. Independent of pressure
During constant rate period, the rate of drying decreases with the______________________?
A. Decrease in air temperature
B. Increase in air humidity
C. Both A. and B.
D. Neither A. nor B.
The binary diffusivity in gases does not depend upon the ___________________?
A. Pressure
B. Temperature
C. Nature of the components
D. None of these
For experimental determination of mass transfer co-efficient by wetted wall tower, the mass transfer area is___________________?
A. Calculated
B. Unknown
C. Known
D. Not required
Which is not concerned directly with mass transfer ?
A. Schmidt number
B. Sherwood number
C. Lewis relationship
D. Froude number
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
Recent Comments