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Mass Transfer

Mass Transfer
Sand is dried in foundaries in a___drier.

Spray
Rotary
Fluidisedbed
Vacuum

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Mass Transfer
In a packed tower, the value of HETP equals HTUOG, when the equilibrium and the operating lines are (where, HETP = height equivalant to a theoretical plate HTUOG = overall gas phase height of a transfer unit)

Neither A nor B
Parallel
Both A & B
Straight

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Mass Transfer
Under conditions of flooding in packed tower, the gas pressure drop

Increases rapidly
Is maximum
Decreases rapidly
Remains constant

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Mass Transfer
When the feed to a distillation column is a saturated liquid, slope of the feed line is

Unity
Zero
None of these
Infinity

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Mass Transfer
If mass diffusivity in a mixture is equal to the thermal diffusivity, then the Lewis number is

< 1
1
> 1

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Mass Transfer
The dimension of diffusivity is same as that of the

Velocity head
Density
Kinematic viscosity
Molal concentration

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