For the air water system under ambient conditions, the adiabatic saturation temperature and the wet bulb temperature are nearly equal, because

Mass Transfer
For the air water system under ambient conditions, the adiabatic saturation temperature and the wet bulb temperature are nearly equal, because

Lewis number is close to unity

Water has a high latent heat of evaporation

Solubility of the components of air in water is very small

They are always equal under all circumstances

Lewis number is close to unity

Water has a high latent heat of evaporation

Solubility of the components of air in water is very small

They are always equal under all circumstances

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Mass Transfer
In McCabe-Thiele method of theoretical plate calculation for a distillation column, the operating lines of stripping and rectifying sections coincide with the diagonal at __________ reflux.

Total

Minimum

Maximum permissible

Operating

Total

Minimum

Maximum permissible

Operating

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

Same as

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

Always lower than

Always higher than

Same as

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

Always lower than

Always higher than

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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
A natural draft cooling tower is filled with wooden grids, which covers about __________ percent of the tower height.

90-100

30-40

44119

70-80

90-100

30-40

44119

70-80

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Mass Transfer
In case of steam distillation, the steam leaving the liquid is not completely saturated with distillate vapour, because

Temperature is less

Total pressure is less

Saturated steam is used for steam distillation

Mixing of steam with the material being vaporised is not so intimate as to result in equilibrium condition

Temperature is less

Total pressure is less

Saturated steam is used for steam distillation

Mixing of steam with the material being vaporised is not so intimate as to result in equilibrium condition

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Mass Transfer

Mass Transfer For the air water system under ambient conditions, the adiabatic saturation temperature and the wet bulb temperature are nearly equal, because

Mass Transfer In McCabe-Thiele method of theoretical plate calculation for a distillation column, the operating lines of stripping and rectifying sections coincide with the diagonal at __________ reflux.

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

Mass Transfer A natural draft cooling tower is filled with wooden grids, which covers about __________ percent of the tower height.

Mass Transfer In case of steam distillation, the steam leaving the liquid is not completely saturated with distillate vapour, because

Mass Transfer
For the air water system under ambient conditions, the adiabatic saturation temperature and the wet bulb temperature are nearly equal, because

Mass Transfer
In McCabe-Thiele method of theoretical plate calculation for a distillation column, the operating lines of stripping and rectifying sections coincide with the diagonal at __________ reflux.

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

Mass Transfer
A natural draft cooling tower is filled with wooden grids, which covers about __________ percent of the tower height.

Mass Transfer
In case of steam distillation, the steam leaving the liquid is not completely saturated with distillate vapour, because