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
The temperature of water cooled in cooling tower is always __________ temperature of entering air.

Less than the wet bulb

Equal to the wet bulb

More than the wet bulb

Equal to the dry bulb

Less than the wet bulb

Equal to the wet bulb

More than the wet bulb

Equal to the dry bulb

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Mass Transfer
Pick out the wrong statement. Raoult's law does not apply, when the

Size of component molecules are not equal

Attractive forces between like and unlike molecules in the solution are approximately equal

Component molecules are nonpolar

Chemical combination or molecular association between unlike molecules takes place in the formation of solution

Size of component molecules are not equal

Attractive forces between like and unlike molecules in the solution are approximately equal

Component molecules are nonpolar

Chemical combination or molecular association between unlike molecules takes place in the formation of solution

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Mass Transfer
Which of the following same diameter columns gives lowest pressure drop per unit height?

Packed column (stacked)

Bubble-cap column

Randomly packed column

Sieve-plate column

Packed column (stacked)

Bubble-cap column

Randomly packed column

Sieve-plate column

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Mass Transfer
When adsorption hysteresis is observed, the desorption equilibrium pressure is __________ that obtained by adsorption.

Always lower than

Dependent on the system; can be either lower or higher than

Same as

Always higher than

Always lower than

Dependent on the system; can be either lower or higher than

Same as

Always higher than

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Mass Transfer
The Kundsen diffusivity is proportional to (where, T = absolute temperature)

√T

T

T²

T⁴

√T

T

T²

T⁴

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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 temperature of water cooled in cooling tower is always __________ temperature of entering air.

Mass Transfer Pick out the wrong statement. Raoult's law does not apply, when the

Mass Transfer Which of the following same diameter columns gives lowest pressure drop per unit height?

Mass Transfer When adsorption hysteresis is observed, the desorption equilibrium pressure is __________ that obtained by adsorption.

Mass Transfer The Kundsen diffusivity is proportional to (where, T = absolute temperature)

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 temperature of water cooled in cooling tower is always __________ temperature of entering air.

Mass Transfer
Pick out the wrong statement. Raoult's law does not apply, when the

Mass Transfer
Which of the following same diameter columns gives lowest pressure drop per unit height?

Mass Transfer
When adsorption hysteresis is observed, the desorption equilibrium pressure is __________ that obtained by adsorption.

Mass Transfer
The Kundsen diffusivity is proportional to (where, T = absolute temperature)