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Mass Transfer

Mass Transfer
Humid volume, at a given temperature is a/an __________ function of humidity.

Inverse
Logarithmic
Linear
Exponential

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Mass Transfer
Calcium ammonium nitrate (a fertiliser) is dried in a __________ dryer.

Tunnel
Tray
Rotary
Vacuum

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Mass Transfer
Molecular diffusivity of a liquid

Decreases with temperature
Increases with temperature
May increase or decrease with temperature
Is independent of temperature

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Mass Transfer
The cooling effect in a cooling tower can not be increased by

Lowering the barometric pressure
Reducing the humidity of entering air
Increasing the air velocity over the wet surfaces
None of these

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Mass Transfer
When a multistage tray tower uses a minimum reflux ratio, it implies

Minimum trays and maximum reboiler heat load
Infinite trays and minimum reboiler heat load
Minimum trays and minimum reboiler heat load
Infinite trays and maximum reboiler heat load

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Mass Transfer
Which of the following provides maximum contact surface for a liquid-vapour system?

Packed tower
Bubble-cap plate column
Wetted wall column
Seive-plate column

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