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.Management Sciences
Category: Mass Transfer
Mass transfer co-efficient is defined as__________________?
A. Flux = Co-efficient/concentration difference
B. Co-efficient = Flux/concentration difference
C. Flux=concentration difference/coefficient
D. None of these
In case of an ideal solution, the total vapor pressure varies ______________ with the composition expressed as mole fraction?
A. Inversely
B. Linearly
C. Exponentially
D. None of these
Rayleigh’s equation applies to ________________ distillation?
A. Continuous
B. Steam
C. Differential
D. Flash
The percentage humidity is less than the relative humidity only at __________________ percent humidity?
A. Zero
B. Hundred
C. Both zero and hundred
D. None of these
During dehumidification of unsaturated air wet bulb temperature & partial pressure of vapor are not constant. However, during evaporative cooling process with recirculated water supply, the _________________ remains constant ?
A. Wet bulb temperature
B. Partial pressure of water vapor
C. Relative humidity
D. None of these
Blowdown in a cooling tower____________________?
A. Means discarding a small fraction of circulating water to prevent and limit the concentration
of salt and impurities
B. Increases the scale forming tendencies of water
C. Is undesirable
D. All A., B. & C.
Weeping in a distillation column_____________________?
A. Increases tray efficiency
B. Provides large interfacial surface for mass transfer
C. Results due to very high gas velocity
D. Results due to very low gas velocity
An Azeotropic mixture is a ________________ mixture?
A. Binary
B. Ternary
C. Constant boiling point
D. None of these
Radioactive nuclear waste is treated in____________________?
A. Mixer-settler extractor
B. Rotating-disc contactor
C. Pulsed column extractor
D. Bollman extractor
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