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Mass Transfer

Mass Transfer
Free flowing granular materials can be best dried in a __________ drier.

Drun
Rotary
Cylinder
Freeze

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Mass Transfer
Absorption accompanied with chemical reaction is exemplified by the absorption of

All of these
SO₂ in alkaline solution
Benzol present in coke oven gas by wash oil
Ammonia in water

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Mass Transfer
Which of the following plays an important role in problems of simultaneous heat and mass transfer?

Lewis number
Prandtl number
Schmidt number
Sherwood number

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Mass Transfer
Design calculation for multiple component distillation is done by

Ponchon-Savarit method
Tray to tray calculations
Enthalpy concentration method
Mccabe-Thiele method

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Mass Transfer
In a single stage extraction process, 10 kg of pure solvent S (containing no solute A) is mixed with 30 kg of feed F containing A at a mass fraction xf = 0.2. The mixture splits into an extract phase E and a raf-finate phase R containing A at xB = 0.5 and xR = 0.05 respectively. The total mass of the extract phase is (in Kg)

10
8.25
8.89
6.89

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Mass Transfer
The Kundsen diffusivity is proportional to (where, T = absolute temperature)

T²
T
√T
T⁴

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