Test: Mass Transfer - 1 - Chemical Engineering MCQ

Which of the following is the most suitable for extraction in a system having very low density difference ?

The term "cooling range" in a cooling tower refers to the difference in the temperature of

Total reflux in a distillation operation requires minimum

The amount of steam required per unit quantity of distillate in case of steam distillation will be reduced by

The difference of wet bulb temperature and adiabatic saturation temperature of unsaturated mixture of any system is

Fenske's equation for determining the minimum number of theoretical stages in distillation column holds good, when the

When the temperature and humidity of air is low, we usually use __________ draft cooling tower.

Pick out the correct statement.

__________ columns are used for liquid dispersion in a continuous gas phase.

Overall efficiency of the distillation column is

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

Which is the controlling factor for a drum drier?

Drying operation under vacuum is carried out to

Air initially at 101. 3 kPa and 40^oC and with a relative humidity of 50%, is cooled at constant pressure to 30^oC. The cooled air has a

Separation of two or more components of a liquid solution can not be achieved by

Stefan's law describes the mass transfer by

At minimum reflux ratio for a given separation

Relative humidity is the ratio of the

In batch distillation with constant reflux, overhead product composition __________ with time.

Psychrometry deals with the properties of gas-vapor mixture. Humidity can be determined by the measurement of the __________ of a fibre.

Heat in BTU necessary to increase the temperature of 1 lb of gas and its accompanying vapour by 1^oF is called the

To increase the absorption factor, (where, G = gas flow rate, S = solvent flow rate)