Lewis number (Le) is___________________?
A. Sc × Pr
B. Pr × St
C. Sh × Pr
D. St × Sh
Month: February 2019
In a gas-liquid absorption column, for obtaining the maximum absorption efficiency____________________?
In a gas-liquid absorption column, for obtaining the maximum absorption efficiency____________________?
A. Liquid stream should be distributed uniformly
B. Gas stream should be distributed uniformly
C. Both gas as well as liquid streams should be distributed uniformly
D. By passing should be completely avoided
Answer: Option C
The slope of the operating line for a single component co-current absorber when plotted in terms of mole ratio units is__________________?
The slope of the operating line for a single component co-current absorber when plotted in terms of mole ratio units is__________________?
A. 0
B. ∞
C. -ve
D. +ve
For a ternary mixture, in which equilateral triangular co-ordinate is used in leaching and extraction, a _______________ of the equilateral triangular co-ordinates?
For a ternary mixture, in which equilateral triangular co-ordinate is used in leaching and extraction, a _______________ of the equilateral triangular co-ordinates?
A. Binary mixture is represented by the apex
B. Binary mixture is represented by any point inside
C. Ternary mixture is represented by the sides
D. Pure component is represented by the apex
Leaching of uranium ore and gold ore is done in________________________?
Leaching of uranium ore and gold ore is done in________________________?
A. Centrifugal extractor
B. Pachuca tanks
C. Bollman extractor
D. None of these
In case of physical adsorption, the difference between heat of adsorption and heat of normal condensation is__________________?
In case of physical adsorption, the difference between heat of adsorption and heat of normal condensation is__________________?
A. Equal to the heat of formation of surface compound
B. Equal to the heat of wetting
C. Zero
D. Called integral heat of adsorption
Powdery materials can be guarded against caking tendency on storage by_________________?
Powdery materials can be guarded against caking tendency on storage by_________________?
A. Providing irregular grain size
B. Providing minimum percentage of voids
C. Having maximum possible points of contact
D. None of these
The minimum liquid rate to be used in an absorber corresponds to an operating line_______________________?
The minimum liquid rate to be used in an absorber corresponds to an operating line_______________________?
A. Of slope = 1
B. Of slope = 0.1
C. Tangential to the equilibrium curve
D. None of these
Separation of two volatile liquids by distillation makes use of their________________________?
Separation of two volatile liquids by distillation makes use of their________________________?
A. Selectivity
B. Relative volatility
C. Solubility
D. Density difference
The critical moisture content in case of drying indicates the _______________ rate period?
The critical moisture content in case of drying indicates the _______________ rate period?
A. Beginning of falling
B. Beginning of constant
C. End of falling
D. None of these