Mass Transfer MCQs

Question 1

Sticky material can be dried in a __________ dryer.

Accepted Answer

Tray

Answer

Rotary

Answer

Fluidised bed

Answer

None of these

Question 2

Molarity is defined as the number of gm moles of solute per __________ of solvent.

Accepted Answer

Litre

Answer

Kg

Answer

Gm

Answer

C.c

Question 3

Alcohol is dehydrated using __________ distillation.

Accepted Answer

Azeotropic

Answer

Extractive

Answer

Steam

Answer

Molecular

Question 4

For stripping of a gas in a counter current stripper, the operating line

Accepted Answer

Can lie above or below the equilibrium curve

Answer

Lies above the equilibrium curve

Answer

Lies below the equilibrium curve

Answer

Is always parallel to the equilibrium curve

Question 5

For __________ drying, the effects of velocity, temperature and humidity of the gas and the thickness of the solid are the same.

Accepted Answer

Both A & B

Answer

Unsaturated surface

Answer

Constant rate

Answer

Neither A nor B

Question 6

In triangular co-ordinates, the ternery composition point falls __________ of the triangle.

Accepted Answer

Inside

Answer

In the corners

Answer

On the sides

Answer

None of these

Question 7

Pick out the correct statement.

Accepted Answer

In Ponchon-Savarit method of no. of theoretical plate determination, the stripping and rectifying operating lines are vertical at total reflux

Answer

The slope of the stripping line is always less than unity

Answer

For a given separation in a binary distillation column, with increase in reflux ratio (above the minimum reflux ratio), the fixed cost of the distillation column first increases and then decreases

Answer

Kremsor-Brown-Souder's equation is used to calculate the efficiency of a plate tower

Question 8

With increase in pressure, the relative volatility for a binary system

Accepted Answer

Decreases

Answer

Increases

Answer

Remains same

Answer

Either A or B, depends on the system

Question 9

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

Accepted Answer

> 100

Answer

100

Answer

< 100

Answer

None of these