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Mass Transfer

Mass Transfer
Large scale drying of wheat is done in a __________ dryer.

Fluidised bed
Tray
Vacuum rotary
Spouted bed

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Mass Transfer
In a packed bed absorption column, the channelling will be noted by the

Sharp drop in pressure drop
Sharp rise in pressure drop
None of these
Increase in flow rate

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Mass Transfer
The value of NA/(NA + NB), for steady state equimolal counter diffusion of two gases 'A' and 'B' is

0.5
∞
2
1

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Mass Transfer
The film penetration model of mass transfer was enunciated by

Fick
Toor and Marchello
Stefan
Gilliland

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Mass Transfer
The unit of volumetric diffusivity is

Cm³/sec
Cm²/sec
Cm/sec
Cm²/seC₂

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Mass Transfer
HETP is numerically equal to HTU, only when the operating line

Lies above the equilibrium line
Lies below the equilibrium line
And equilibrium lines are parallel
Is far from the equilibrium line

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