A 25 cm x 25 cm x 1 cm flat sheet weighing 1.2 kg initially was dried from both sides under constant drying rate conditions. It took 1500 seconds for the weight of the sheet to reduce to 1.05 kg. Another 1m x 1m x 1cm flat sheet of the same material is to be dried from one side only.Under the same constant drying rate conditions, the time required for drying (in seconds) from its initial weight of 19.2 kg to 17.6 kg is

Mass Transfer
A 25 cm x 25 cm x 1 cm flat sheet weighing 1.2 kg initially was dried from both sides under constant drying rate conditions. It took 1500 seconds for the weight of the sheet to reduce to 1.05 kg. Another 1m x 1m x 1cm flat sheet of the same material is to be dried from one side only.Under the same constant drying rate conditions, the time required for drying (in seconds) from its initial weight of 19.2 kg to 17.6 kg is

2000

1500

1000

2500

2000

1500

1000

2500

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Mass Transfer
Ion exchange process is similar to

Absorption

Leaching

Extraction

Adsorption

Absorption

Leaching

Extraction

Adsorption

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Mass Transfer
With increase in the mass velocity of the gas, the rate of drying during the constant rate period __________ , if the conduction and radiation through the solid are negligible.

Decreases

Increases linearly

Remains same

Increases

Decreases

Increases linearly

Remains same

Increases

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Mass Transfer
Drying operation under vacuum is carried out to

Dry those materials which have very high unbound mositure content

Dry materials having high bound moisture content

Increase drying temperature

Reduce drying temperature

Dry those materials which have very high unbound mositure content

Dry materials having high bound moisture content

Increase drying temperature

Reduce drying temperature

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Mass Transfer
The solvent used in liquid-liquid extraction should have __________ less than one.

Selectivity

Both A & B

Neither A nor B

Distribution co-efficient

Selectivity

Both A & B

Neither A nor B

Distribution co-efficient

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Mass Transfer
Unsaturated air (with dry bulb temperature and dew point being 35°C and 18°C respectively) is passed through a water spray chamber maintained at 15°C. The air will be cooled

And dehumidified with increase in wet bulb temperature

At the same relative humidity

And dehumidified with decrease in wet bulb temperature

And humidified

And dehumidified with increase in wet bulb temperature

At the same relative humidity

And dehumidified with decrease in wet bulb temperature

And humidified

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Mass Transfer

Mass Transfer Ion exchange process is similar to

Mass Transfer With increase in the mass velocity of the gas, the rate of drying during the constant rate period __________ , if the conduction and radiation through the solid are negligible.

Mass Transfer Drying operation under vacuum is carried out to

Mass Transfer The solvent used in liquid-liquid extraction should have __________ less than one.

Mass Transfer Unsaturated air (with dry bulb temperature and dew point being 35°C and 18°C respectively) is passed through a water spray chamber maintained at 15°C. The air will be cooled

Mass Transfer
Ion exchange process is similar to

Mass Transfer
With increase in the mass velocity of the gas, the rate of drying during the constant rate period __________ , if the conduction and radiation through the solid are negligible.

Mass Transfer
Drying operation under vacuum is carried out to

Mass Transfer
The solvent used in liquid-liquid extraction should have __________ less than one.

Mass Transfer
Unsaturated air (with dry bulb temperature and dew point being 35°C and 18°C respectively) is passed through a water spray chamber maintained at 15°C. The air will be cooled