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Mass Transfer

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

Truck
Rotary
Spouted bed
Tray

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Mass Transfer
Deairation (removal of O₂) of water is done by

Absorption
Rectification
Ion-exchange
Adsorption

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Mass Transfer
During the constant rate period of drying of a solid,

Surface evaporation of unbound moisture occurs
Increased air humidity decreases the rate of drying
None of these
Increasing the air temperature decreases the drying rate

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Mass Transfer
At a given equilibrium pressure, with increase in temperature, the concentration of adsorbed gas on solid adsorbant

Remains unchanged
Decreases
Increases exponentially
Increases

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Mass Transfer
Mass transfer co-efficient of liquid is

None of these
Not affected by the temperature
Affected much less by temperature than that for gases
Affected more by temperature than that for gases

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Mass Transfer
The slope of the operating line for a single component co-current absorber when plotted in terms of mole ratio units is

∞
-ve
+ve

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