Test: Mass Transfer - 3 - Chemical Engineering MCQ

A coalescer in a mixer-settler liquid-liquid extraction coloumn

For the same feed, feed quality and separation (in a distillation column), with the increase of total pressure, the number of ideal plates will

Pick out the correct statement.

The operation involved when the soluble material is largely on the surface of an insoluble solid and is merely washed off by the solvent is called

In the constant rate period of the rate of drying curve for batch drying,

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%).

When the liquid phase and vapour phase of a binary system obeys Raoult's and Dalton's law respectively, the relative volatility is the ratio of

Agitator is provided in a crystalliser for

__________ diffusion is used for separating the isotopes of methane.

Ordinary diffusion process is also called __________ diffusion.

Pick out the wrong statement.

Pick out the wrong statement pertaining to the rotary dryer.

The reason for preferring packed towers over plate towers in distillation practice is that the packed tower operation gives

If the path of liquid across the plate is very long as in case of large diameter tower, Murphree efficiency can be __________ percent.

Compound A is extracted from a solution of A + B into a pure solvent S. A Co-current unit is used for the liquid-liquid extraction. The inlet rate of the solution containing A is 200 moles of B/hr.m² and the solvent flow, rate is 400 moles of S/m². hr. The equilibrium data is represented by Y = 3X² , where Y is in moles of a A/moles of B and X is in moles A/moles of S. The maximum percentage extraction achieved in the unit is

Raoult's law is applicable to the

Weeping in a distillation column

In case of binary distillation, increasing the reflux ratio above optimum does not result in the increase of

Wetted wall tower experiment determines the

In McCabe-Thiele method, at infinite reflux ratio

With decrease in the throughput (compared with the design capacity) for a bubble cap distillation column, its efficiency

Plate towers are preferred to packed towers, when large temperature changes are involved, because of the reason that the