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.Management Sciences
Category: Mass Transfer
Smoke is an example of ___________________?
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A. Solid dispersed in liquid
B. Solid dispersed in gas
C. Liquid dispersed in gas
D. Gas dispersed in liquid
Pick out the correct relationship. (Where, Ri = internal reflux ratio Ro = external reflux ratio.) ?
A. (1 + Ro) = Ro/Ri
B. (1 – Ro) = Ro/Ri
C. (1 + Ri) = Ro/Ri
D. (1 – Ri) = Ro/Ri
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
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