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.Management Sciences
Category: Mass Transfer
Diffusion co-efficient generally depends upon the temperature, pressure & the nature of the components of the system. Its dimension is not the same as that of the_________________?
A. Mass transfer co-efficient
B. Thermal diffusivity
C. Kinematic viscosity
D. Volumetric diffusivity
The value of „L/mG’ ratio for economical absorption operation ranges from _____________________?
A. 0.5 to 0.8
B. 0.8 to 1.2
C. 1.25 to 2.0
D. 2.5 to 3.5
Which of the following is not a continuous drier ?
A. Drum drier
B. Spray drier
C. Tunnel drier
D. Tray drier
HETP is numerically equal to HTU, only when the operating line ______________________?
A. Lies below the equilibrium line
B. Lies above the equilibrium line
C. And equilibrium lines are parallel
D. Is far from the equilibrium line
The reciprocal of stripping factor is termed as ________________________?
A. Selectivity index
B. Relative volatility
C. Absorption factor
D. Murphree efficiency
The equation, NA = (DAB . Pt /RTZ) (y1 – y2) is for _______________________?
A. Steady state equimolar counter diffusion
B. Fick’s first law of diffusion
C. Steady state diffusion for stagnant case
D. Liquid M.T.C. by penetration theory
When the liquid phase and vapour phase of a binary system obeys Raoult’s and Dalton’s law respectively, the relative volatility is the ratio of________________________?
A. Vapour pressure of component A to that of component B
B. Vapour pressure of component A to the total pressure
C. Vapour pressure of component A to the partial pressure of A
D. Partial pressure of component A to the total pressure
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