Search
.Management Sciences
Category: Mass Transfer
For a binary mixture with low relative volatility, continuous rectification to get pure products will require_____________________?
A. Low reflux ratio
B. Less number of trays
C. Small cross-section column
D. High reflux ratio
For ethanol-water system, the lowering of distillate quality from 95% to 92% will cause ____________________ plate requirement?
A. No change in theoretical
B. Marginal decrease in the number of
C. Major decrease in the number of
D. None of these
Flash distillation is _______________________?
A. Same as differential distillation
B. Used for multi-component systems like crude refining
C. Same as simple distillation
D. Most useful for handling binary systems
For _______________ drying, the effects of velocity, temperature and humidity of the gas and the thickness of the solid are the same?
A. Unsaturated surface
B. Constant rate
C. Both A. and B.
D. Neither A. nor B.
The recovery of penicillin from the acidified fermentation broth is done by__________________?
A. Distillation
B. Evaporation
C. Absorption
D. Liquid extraction
Binary distillation involves the mass transfer by ______________________ at the gas-liquid interface?
A. Unidirectional diffusion from liquid to gas phase
B. Unidirectional diffusion from gas to liquid phase
C. Either A. or B.
D. A counter diffusion at an almost equal molar rate
Dew point of an air-water vapor mixture_________________?
A. Decreases with decrease in pressure
B. At constant humidity & total pressure is fixed
C. Corresponding to any point on the humidity chart is obtained by projecting a line through this
point parallel to the temperature axis and to the saturation curve
D. All A , B. & C.
In distillation columns, the number of bubble caps per tray primarily depends upon the_______________________?
A. Allowable liquid velocity
B. Allowable gas velocity
C. Allowable gas and liquid velocities
D. Feed composition
Recent Comments