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Mass Transfer

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

T²
T⁴
√T
T

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Mass Transfer
Moisture content of a substance when at equilibrium with a given partial pressure of the vapour is called the __________ moisture.

Bound
Unbound
Equilibrium
Free

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Mass Transfer
Occurrence of 'case hardening' during drying of a high moisture solid cake __________ the drying rate.

Increases
Decreases
Does not affect
Exponentially increases

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Mass Transfer
Hydrogenation of oil is carried out in a/an __________ in Vanaspati manufacturing plant.

Packed tower
Sieve tray column
Agitated vessel
Bubble cap column

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Mass Transfer
With increase in absolute humidity, the dew point of an unsaturated mixture of air and water vapor (at constant pressure and temperature)

Remains unchanged
Decreases
Increases
Decreases linearly

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Mass Transfer
Which is the controlling factor for a drum drier?

Both A & B
Heat transfer
Neither A nor B
Diffusion

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