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.Management Sciences
Category: Mass Transfer
Large scale usage of flash distillation is practised in __________________?
A. Soap manufacturing
B. Ammonia synthesis plant
C. Polymerisation industry
D. Petroleum refining
Unit of molal diffusivity is____________________?
A. cm2/sec gm . mole
B. gm moles/cm2 . sec
C. gm moles/cm. sec
D. gm moles/cm2. sec
For absorbing a sparingly soluble gas in a liquid ___________________?
A. Gas side mass transfer co-efficient should be increased
B. Liquid side mass transfer co-efficient should be increased
C. Liquid side mass transfer co-efficient should be decreased
D. Mass transfer co-efficient must be kept constant
Which of the following is directly concerned with Psychrometry ?
A. Lewis relationship
B. Galileo number
C. Weber number
D. Dean number
Leaching of coffee from coffee beans is done by___________________?
A. Hot water
B. Hexane
C. Lime water
D. Dilute H2SO4 (hot)
Alcohol is dehydrated using ______________ distillation?
A. Extractive
B. Azeotropic
C. Steam
D. Molecular
Can the efficiency of a plate in the distillation tower be greater than 100% ?
A. Yes
B. Normally not; but is possible if infinite number of plates are put
C. Never
D. Yes; if the reflux ratio is maximum
Coffee is prepared from coffee beans by leaching with____________________?
A. Cold water
B. Hot water
C. Dilute hot caustic solution
D. Naphtha
Cox chart is useful in the design of___________________?
A. Distillation column
B. Evaporator
C. Dryer
D. Crystalliser
At 750°K and 1 atm, the approximate value of Schmidt number for air is_________________?
A. 0.01
B. 0.1
C. 1
D. 10
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