Which of the following psychrometric processes is followed by water vapour laden unsaturated air, when it is passed through solid or liquid adsorbent?

Mass Transfer
Which of the following psychrometric processes is followed by water vapour laden unsaturated air, when it is passed through solid or liquid adsorbent?

Dehumidification with dry bulb temperature remaining constant

Heating and dehumidification at almost constant wet bulb temperature

Cooling and dehumidification

None of these

Dehumidification with dry bulb temperature remaining constant

Heating and dehumidification at almost constant wet bulb temperature

Cooling and dehumidification

None of these

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Mass Transfer
During constant rate period, the rate of drying decreases with the

Decrease in air temperature

Increase in air humidity

Both A & B

Neither A nor B

Decrease in air temperature

Increase in air humidity

Both A & B

Neither A nor B

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Mass Transfer
Though, theoretically the adsorption & desorption isotherms is expected to coincide but sometimes at least a part of the isotherms does not coincide and this phenomenon is known as adsorption hysterisis. In such cases, the desorption equilibrium pressure is __________ that obtained for adsorption.

Either same or higher than

Same as

Higher than

Lower than

Either same or higher than

Same as

Higher than

Lower than

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Mass Transfer
The relation among various mass transfer co-efficients (M.T.C) for ideal gases is given by (where, Kc & Km are M.T.C. for equimolar counter diffusion with concentration & mole fraction respectively as the driving force. and, Kp = M.T.C. for diffusion of a gas through a stagnant inert gas with pressure as driving force.)

Kc = Kp . RT = Km . RT/p

Kc = Kp/RT = Km . RT/P

Kc = Kp = Km

None of these

Kc = Kp . RT = Km . RT/p

Kc = Kp/RT = Km . RT/P

Kc = Kp = Km

None of these

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Mass Transfer
The percentage humidity is less than the relative humidity only at __________ percent humidity.

Hundred

Zero

None of these

Both zero and hundred

Hundred

Zero

None of these

Both zero and hundred

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Mass Transfer
With increase in temperature, the mutual solubility of two liquids

Remains unchanged

Decreases exponentially

Increases

Decreases

Remains unchanged

Decreases exponentially

Increases

Decreases

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Mass Transfer

Mass Transfer Which of the following psychrometric processes is followed by water vapour laden unsaturated air, when it is passed through solid or liquid adsorbent?

Mass Transfer During constant rate period, the rate of drying decreases with the

Mass Transfer The percentage humidity is less than the relative humidity only at __________ percent humidity.

Mass Transfer With increase in temperature, the mutual solubility of two liquids

Mass Transfer
Which of the following psychrometric processes is followed by water vapour laden unsaturated air, when it is passed through solid or liquid adsorbent?

Mass Transfer
During constant rate period, the rate of drying decreases with the

Mass Transfer
The percentage humidity is less than the relative humidity only at __________ percent humidity.

Mass Transfer
With increase in temperature, the mutual solubility of two liquids