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Mass Transfer

Mass Transfer
Diameter to height ratio for a rashig ring is

2
5
0.5
1

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Mass Transfer
Corresponding to Nusselt number in heat transfer, the dimensionless group in mass transfer is the __________ number.

Stanton
Schmidt
Peclet
Sherwood

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Mass Transfer
The drying time between fixed moisture content within diffusion controlled 'falling rate period' is proportional to (assuming that drying occurs from all surfaces of the solid) (where, T = thickness of the solid )

√T
T³
T
T²

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Mass Transfer
The change in enthalpy, when a unit quantity of gas is absorbed by relatively large quantity of adsorbent (on which a definite concentration of the adsorbed gas already exists) is termed as the

Differential heat of adsorption
Heat of wetting
None of these
Integral heat of adsorption

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Mass Transfer
Which of the following assumes constant molal vaporisation and overflow?

McCabe-Thiele method
Enthalpy concentration method
Plate absorption column
Ponchan-Savarit method

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Mass Transfer
__________ extractor is used for the concentration of radioactive nuclear waste.

Mixer-settler
Seive plate
Pulsed column
None of the listed here

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