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.Management Sciences
Category: Mass Transfer
The rate of mass transfer is not dependent upon the______________________?
A. Degree of dispersion of one fluid in the other
B. Interfacial surface exposed between the phases
C. Both A. & B.
D. None of these
__________________ is concerned with the adsorption equilibria?
A. Fick’s law
B. Gibb’s equation
C. Freundlich equation
D. None of these
The Hatta number is important in_________________?
A. Multi-component distillation
B. Binary distillation
C. Gas absorption without chemical reaction
D. Gas absorption with chemical reaction
Ammonia present in the coke oven gas is removed by washing with___________________?
A. Caustic solution
B. Dilute ammoniacal liquor
C. Dilute HCl
D. Ethanolamine
The boiling points of pure components of a binary system ________________ with increase in total pressure of the system ?
A. Decreases
B. Increases
C. Remains unchanged
D. May increase or decrease, depends on the system
A solid is being dried in the linear drying rate regime from moisture content Xo to XF. The drying rate is zero at X = 0 and the critical moisture content is the same as the initial moisture Xo. The drying time for M = (Ls/ARc) is (where, L = total mass of dry solid, A = total surface area for drying Rc = Constant maximum drying rate per unit area X = moisture content (in mass of water/mass of dry solids)) ?
A. M(Xo – XF)
B. M(Xo/XF)
C. M ln(Xo/XF)
D. MXo ln(Xo/XF)
Which of the following is used for the concentration of rubber latex ?
A. Agitated film evaporator
B. Long tube vertical evaporator
C. Short tube evaporator
D. Calandria
Bollman extractor___________________?
A. Is a static bed leaching equipment
B. Is used for extraction of oil from oilseed
C. Is a centrifugal extractor
D. Employs only counter-current extraction
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