It takes 6 hours to dry a wet solid from 50% moisture content to the critical moisture content of 15%. How much longer it will take to dry the solid to 10% moisture content, under the same drying conditions? (The equilibrium moisture content of the solid is 5%).

Mass Transfer
It takes 6 hours to dry a wet solid from 50% moisture content to the critical moisture content of 15%. How much longer it will take to dry the solid to 10% moisture content, under the same drying conditions? (The equilibrium moisture content of the solid is 5%).

94 min

71 min

15 min

51 min

94 min

71 min

15 min

51 min

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Mass Transfer
The rate of mass transfer is not dependent upon the

Interfacial surface exposed between the phases

None of these

Both A & B

Degree of dispersion of one fluid in the other

Interfacial surface exposed between the phases

None of these

Both A & B

Degree of dispersion of one fluid in the other

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Mass Transfer
Use of raschig rings in place of crushed stones as packing in packed beds (other things being same)

Decreases pressure drop, increases surface area

Increases pressure drop, increases surface area

Increases pressure drop, decreases surface area

Decreases pressure drop, decreases surface area

Decreases pressure drop, increases surface area

Increases pressure drop, increases surface area

Increases pressure drop, decreases surface area

Decreases pressure drop, decreases surface area

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Mass Transfer
Drying operation under vacuum is carried out to

Dry materials having high bound moisture content

Reduce drying temperature

Dry those materials which have very high unbound mositure content

Increase drying temperature

Dry materials having high bound moisture content

Reduce drying temperature

Dry those materials which have very high unbound mositure content

Increase drying temperature

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Mass Transfer
In a binary system, separation is very efficient, when the relative volatility is

< 1

0.5

> 1

1

< 1

0.5

> 1

1

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Mass Transfer
The wet and 'dry bulb temperature for a vapour-gas mixture are 25°C and 30°C respectively. If the mixture is heated to 45°C at constant pressure, the wet bulb temperature will be __________ °C.

25

< 25

-25

> 25

25

< 25

-25

> 25

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Mass Transfer

Mass Transfer It takes 6 hours to dry a wet solid from 50% moisture content to the critical moisture content of 15%. How much longer it will take to dry the solid to 10% moisture content, under the same drying conditions? (The equilibrium moisture content of the solid is 5%).

Mass Transfer The rate of mass transfer is not dependent upon the

Mass Transfer Use of raschig rings in place of crushed stones as packing in packed beds (other things being same)

Mass Transfer Drying operation under vacuum is carried out to

Mass Transfer In a binary system, separation is very efficient, when the relative volatility is

Mass Transfer The wet and 'dry bulb temperature for a vapour-gas mixture are 25°C and 30°C respectively. If the mixture is heated to 45°C at constant pressure, the wet bulb temperature will be __________ °C.

Mass Transfer
It takes 6 hours to dry a wet solid from 50% moisture content to the critical moisture content of 15%. How much longer it will take to dry the solid to 10% moisture content, under the same drying conditions? (The equilibrium moisture content of the solid is 5%).

Mass Transfer
The rate of mass transfer is not dependent upon the

Mass Transfer
Use of raschig rings in place of crushed stones as packing in packed beds (other things being same)

Mass Transfer
Drying operation under vacuum is carried out to

Mass Transfer
In a binary system, separation is very efficient, when the relative volatility is

Mass Transfer
The wet and 'dry bulb temperature for a vapour-gas mixture are 25°C and 30°C respectively. If the mixture is heated to 45°C at constant pressure, the wet bulb temperature will be __________ °C.