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.Management Sciences
Category: Mass Transfer
The overall mass transfer co-efficient for the absorption of SO2 in air with dilute NaOH solution can be increased substantially by___________________?
A. Increasing the gas film co-efficient
B. Increasing the liquid film co-efficient
C. Increasing the total pressure
D. Decreasing the total pressure
_____________ extractor is used for the concentration of radioactive nuclear waste?
A. Pulsed column
B. Sieve plate
C. Mixer-settler
D. Bollman
Stefan’s law describes the mass transfer by________________?
A. Diffusion
B. Bulk flow
C. Both A. & B.
D. Neither A. nor B.
Which of the following can be calculated theoretically using steam table and Dalton’s law of partial pressure; if the relative humidity and dry bulb temperature of moist air is known ?
A. Dew point
B. Humidity ratio
C. Wet bulb temperature
D. None of these
The difference of wet bulb temperature and adiabatic saturation temperature of unsaturated mixture of any system is___________________?
A. +ve
B. -ve
C. Zero
D. None of these
_______________ column is used in gas absorption process ?
A. Wetted wall
B. Sieve/perforated tray
C. Bubble cap
D. Packed
Dorr thickener is an equipment used for______________________?
A. Classification
B. Sedimentation
C. Clarification
D. Leaching
Ponchon-Savarit method analyses the fractional equipment based on___________________?
A. Enthalpy balance only
B. Material balance only
C. Both enthalpy and material balances
D. The assumption of constant molal-overflow
Mass transfer rate between two fluid phases does not necessarily depend on the ______________ of the two phases?
A. Chemical properties
B. Physical properties
C. Degree of turbulence
D. Interfacial area
For a binary mixture with low relative volatility___________________?
A. Use steam distillation
B. Use molecular distillation
C. Use high pressure distillation
D. An azeotrope may be formed during distillation
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