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.Management Sciences
Category: Mass Transfer
Large scale drying of wheat is done in a ________________ dryer?
A. Fluidised bed
B. Spouted bed
C. Tray
D. Vacuum rotary
Use of natural draft cooling tower is practised, when the air has low ?
A. Humidity
B. Temperature
C. Both A. & B.
D. Neither A. nor B.
Humidification involves mass transfer between a pure liquid phase and a fixed gas, which is___________________?
A. Insoluble in the liquid
B. Soluble in the liquid
C. Non-ideal in nature
D. At a fixed temperature
Moisture content of a substance when at equilibrium with a given partial pressure of the vapour is called the _______________ moisture?
A. Free
B. Unbound
C. Equilibrium
D. Bound
Separation of two or more components of a liquid solution cannot be achieved by___________________?
A. Fractional crystallisation
B. Liquid extraction
C. Absorption
D. Evaporation
The ratio of Murphree plate efficiency to point efficiency is 1 in a ______________________ flow model?
A. Plug
B. Perfectly mixed
C. Both A. & B.
D. Neither A. nor B.
Lewis number, which is important in problems involving simultaneous heat and mass transfer, is the ratio of__________________?
A. Mass diffusivity to momentum diffusivity
B. Thermal diffusivity to mass diffusivity
C. Momentum diffusivity to thermal diffusivity
D. None of these
Physical absorption is__________________?
A. An irreversible phenomenon
B. A reversible phenomenon
C. Accompanied by evolution of heat
D. Both B. and C.
Dorr thickener is an equipment used for___________________?
A. Classification
B. Sedimentation
C. Clarification
D. Leaching
For contacting a highly soluble gas with a liquid ____________________?
A. Bubble the gas through liquid
B. Spray the liquid on gas stream
C. Either A. or B. would suffice
D. None of these
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