An air-water vapour mixture has a dry bulb temperature of 60°C and a dew point temperature of 40°C. The total pressure is 101.3 kPa and the vapour pressure of water at 40°C and 60°C are 7.30 kPa and 19.91 kPa respectively.The humidity of air sample expressed as kg of water vapour/kg of dry air is

Mass Transfer
An air-water vapour mixture has a dry bulb temperature of 60°C and a dew point temperature of 40°C. The total pressure is 101.3 kPa and the vapour pressure of water at 40°C and 60°C are 7.30 kPa and 19.91 kPa respectively.The humidity of air sample expressed as kg of water vapour/kg of dry air is

0.152

0.122

0.079

0.048

0.152

0.122

0.079

0.048

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Mass Transfer
In case of absorption, both the operating and equilibrium lines will be straight for

Dilute solutions and isothermal operation

None of these

Dilute solutions

Isothermal operation

Dilute solutions and isothermal operation

None of these

Dilute solutions

Isothermal operation

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Mass Transfer
A distillation column with N plates is being operated under normal conditions. At some point of time, the operation is shifted to total reflux condition (i.e., no product and residue are being withdrawn and feed to the column is stopped). At the new steady state,

The top and bottom compositions correspond to the maximum enrichment available

Composition of vapors and that of liquid do not vary throughout the column

The top and bottom compositions are unchanged with and without total reflux

Reboiler load and condenser load are minimum

The top and bottom compositions correspond to the maximum enrichment available

Composition of vapors and that of liquid do not vary throughout the column

The top and bottom compositions are unchanged with and without total reflux

Reboiler load and condenser load are minimum

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Mass Transfer
For achieving rapid drying rate in a spray dryer, the diameter of the particles in the feed should be in the range of __________ microns (1 mm = 1000 microns).

22190

> 500

200-300

43835

22190

> 500

200-300

43835

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Mass Transfer
On addition of solute in the solvent, the __________ of the solution decreases.

Freezing point

Vapour pressure

Both B and C

Boiling point

Freezing point

Vapour pressure

Both B and C

Boiling point

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Mass Transfer
Unsaturated air (with dry bulb and wet bulb temperatures being 45°C and 25°C respectively) is passed through a water spray chamber maintained at 23°C. The air will be cooled and

None of these

Humidified with wet bulb temperature decreasing

Dehumidified

Humidified at constant wet bulb temperature

None of these

Humidified with wet bulb temperature decreasing

Dehumidified

Humidified at constant wet bulb temperature

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Mass Transfer

Mass Transfer In case of absorption, both the operating and equilibrium lines will be straight for

Mass Transfer A distillation column with N plates is being operated under normal conditions. At some point of time, the operation is shifted to total reflux condition (i.e., no product and residue are being withdrawn and feed to the column is stopped). At the new steady state,

Mass Transfer For achieving rapid drying rate in a spray dryer, the diameter of the particles in the feed should be in the range of __________ microns (1 mm = 1000 microns).

Mass Transfer On addition of solute in the solvent, the __________ of the solution decreases.

Mass Transfer Unsaturated air (with dry bulb and wet bulb temperatures being 45°C and 25°C respectively) is passed through a water spray chamber maintained at 23°C. The air will be cooled and

Mass Transfer
In case of absorption, both the operating and equilibrium lines will be straight for

Mass Transfer
A distillation column with N plates is being operated under normal conditions. At some point of time, the operation is shifted to total reflux condition (i.e., no product and residue are being withdrawn and feed to the column is stopped). At the new steady state,

Mass Transfer
For achieving rapid drying rate in a spray dryer, the diameter of the particles in the feed should be in the range of __________ microns (1 mm = 1000 microns).

Mass Transfer
On addition of solute in the solvent, the __________ of the solution decreases.

Mass Transfer
Unsaturated air (with dry bulb and wet bulb temperatures being 45°C and 25°C respectively) is passed through a water spray chamber maintained at 23°C. The air will be cooled and