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

51 min

15 min

94 min

71 min

51 min

15 min

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Mass Transfer
In a binary distillation column, if the feed contains 40 mole % vapour, the q line will have a slope of

0.6

-1.5

1.5

-0.6

0.6

-1.5

1.5

-0.6

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Mass Transfer
High pressure at the bottom of a distillation tower handling heat sensitive materials results in

Thermal decomposition of bottoms

Very efficient operation

Increased relative volatility

Erosion of the tower

Thermal decomposition of bottoms

Very efficient operation

Increased relative volatility

Erosion of the tower

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Mass Transfer
When the mixture to be distilled has a very high boiling point and the product material is heat sensitive, the separation technique to be used is __________ distillation.

Azerotropic

Continuous

Steam

None of these

Azerotropic

Continuous

Steam

None of these

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Mass Transfer
Experiments were conducted to determine the flux of a species A in a stagnant medium across a gas-liquid interface. The overall mass transfer co-efficient based on the liquid side for dilute systems for the above was estimated to be 4 x 10⁻³ kg mole/m².s. The equilibrium data for the system is given as y = 2x. The flux across the interface (in kg mole/m² .s) for bulk concentrations of A in gas phase and liquid phase as y = 0.4 and x = 0.01 respectively is

5.6 x 10⁻³

8.5 x 10⁻³

5.6 x 10⁻⁴

8.5 x 10⁻⁴

5.6 x 10⁻³

8.5 x 10⁻³

5.6 x 10⁻⁴

8.5 x 10⁻⁴

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Mass Transfer
Rotary dryers cannot handle __________ materials.

Dry

Grannular

Sticky

Free flowing

Dry

Grannular

Sticky

Free flowing

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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 In a binary distillation column, if the feed contains 40 mole % vapour, the q line will have a slope of

Mass Transfer High pressure at the bottom of a distillation tower handling heat sensitive materials results in

Mass Transfer When the mixture to be distilled has a very high boiling point and the product material is heat sensitive, the separation technique to be used is __________ distillation.

Mass Transfer Rotary dryers cannot handle __________ materials.

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
In a binary distillation column, if the feed contains 40 mole % vapour, the q line will have a slope of

Mass Transfer
High pressure at the bottom of a distillation tower handling heat sensitive materials results in

Mass Transfer
When the mixture to be distilled has a very high boiling point and the product material is heat sensitive, the separation technique to be used is __________ distillation.

Mass Transfer
Rotary dryers cannot handle __________ materials.