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Mass Transfer

Mass Transfer
The suitable evaporator for concentration of foaming liquids is a __________ evaporator.

Long tube
Short tube
Falling film
Vacuum

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Mass Transfer
__________ column is used in gas absorption process.

Seive/perforated tray
Wetted wall
Packed
Bubble cap

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Mass Transfer
Mass transfer co-efficient is directly proportional to DAB according to the __________ theory.

Surface-renewal
Penetration
None of these
Film

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Mass Transfer
It takes 6 hours to dry a wet solid from 50% moisture content to the critical moisture content of 15%. How much longer it will take to dry the solid to 10% moisture content, under the same drying conditions? (The equilibrium moisture content of the solid is 5%).

15 min
94 min
71 min
51 min

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Mass Transfer
Paper industry employs __________ driers.

Rotary
Fluidised bed
Cylinder
Spray

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Mass Transfer
L/mG is the expression for

Slope of operating line in absorber
Absorption factor
Brinkman number
Slope of operating line in stripper

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