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.Management Sciences
Category: Mass Transfer
Stacked packing compared to dumped packing_________________?
A. Provides poorer contact between the fluids
B. Gives lower pressure drop
C. Both A. and B.
D. Gives higher pressure drop
The falling rate period in the drying of a solid is characterised by__________________?
A. Increase in rate of drying
B. Increasing temperatures both on the surface and within the solid
C. Decreasing temperatures
D. None of these
With increase in absolute humidity, the dew point of an unsaturated mixture of air and water vapor (at constant pressure and temperature) ?
A. Increases
B. Remains unchanged
C. Decreases
D. Decreases linearly
In an interphase mass transfer process, the lesser the solubility of a given solute in a liquid, the higher are the chances that the transfer process will be_________________?
A. Liquid phase resistance-controlled
B. Gas phase resistance controlled
C. Impossible
D. Driven by a non-linear driving force
Hydrogenation of oil is carried out in a/an _______________ in Vanaspati manufacturing plant?
A. Agitated vessel
B. Sieve tray column
C. Bubble cap column
D. Packed tower
Dimension of mass diffusivity is the same as that of_____________________?
A. Kinematic viscosity
B. Dynamic viscosity
C. Surface tension
D. Pressure
Back-trapping in a distillation column ?
A. Increases tray efficiency
B. Decreases tray efficiency
C. Reduces pressure drop
D. Is desirable, as it provides improved vapour-liquid contact
On addition of solute in the solvent, the ______________ of the solution decreases ?
A. Boiling point
B. Freezing point
C. Vapour pressure
D. Both B. and C.
The vapour pressure exerted by the moisture contained in a wet solid depends upon the____________________?
A. Nature of the moisture
B. Temperature
C. Nature of the solid
D. All A., B. and C.
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