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%).

15 min

51 min

71 min

94 min

15 min

51 min

71 min

94 min

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Mass Transfer
Heat sensitive materials with very high latent heat of vaporisation may be economically separated using

Distillation

Absorption

Evaporation

Liquid extraction

Distillation

Absorption

Evaporation

Liquid extraction

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Mass Transfer
Relative humidity is the ratio of the

Partial pressure of the vapour to the vapour pressure of the liquid at gas temperature

Actual humidity to saturation humidity

None of these

Partial pressure of the vapour to the vapour pressure of the liquid at room temperature

Partial pressure of the vapour to the vapour pressure of the liquid at gas temperature

Actual humidity to saturation humidity

None of these

Partial pressure of the vapour to the vapour pressure of the liquid at room temperature

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Mass Transfer
Overall efficiency of the distillation column is

Always more than the point efficiency

The ratio of number of actual plates to ideal plates

Same as the Murphree efficiency

The ratio of number of ideal plates to actual plates

Always more than the point efficiency

The ratio of number of actual plates to ideal plates

Same as the Murphree efficiency

The ratio of number of ideal plates to actual plates

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Mass Transfer
When the __________ the relative humidity of air decreases, despite an increase in the absolute humidity.

Pressure falls

Temperature falls

Pressure rises

Temperature rises

Pressure falls

Temperature falls

Pressure rises

Temperature rises

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Mass Transfer
When an unsaturated air-water mixture is heated at constant pressure, then

The specific humidity decreases

The relative humidity decreases

The relative humidity increases

The partial pressure of water vapour increases

The specific humidity decreases

The relative humidity decreases

The relative humidity increases

The partial pressure of water vapour increases

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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 Heat sensitive materials with very high latent heat of vaporisation may be economically separated using

Mass Transfer Relative humidity is the ratio of the

Mass Transfer Overall efficiency of the distillation column is

Mass Transfer When the __________ the relative humidity of air decreases, despite an increase in the absolute humidity.

Mass Transfer When an unsaturated air-water mixture is heated at constant pressure, then

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
Heat sensitive materials with very high latent heat of vaporisation may be economically separated using

Mass Transfer
Relative humidity is the ratio of the

Mass Transfer
Overall efficiency of the distillation column is

Mass Transfer
When the __________ the relative humidity of air decreases, despite an increase in the absolute humidity.

Mass Transfer
When an unsaturated air-water mixture is heated at constant pressure, then