Mass Transfer Multiple Choice Questions

Mass Transfer

Question 1.

Mass transfer rate between two fluid phases does not necessarily depend on the __________ of the two phases.

A.

 Chemical properties

B.

 Physical properties

C.

 Degree of turbulence

D.

 Interfacial area

Explanation :

Explanation Not Provided

Question 2.

For ethanol-water system, the lowering of distillate quality from 95% to 92% will cause __________ plate requirement.

A.

 No change in theoretical

B.

 Marginal decrease in the number of

C.

 Major decrease in the number of

D.

 None of these

Explanation :

Explanation Not Provided

Question 3.

The mass diffusivity, the thermal diffusivity and the eddy momentum diffusivity are same for, NPr = NSc = __________

A.

 1

B.

 0.5

C.

 10

D.

 0

Explanation :

Explanation Not Provided

Question 4.

The interfacial area per unit volume of dispersion, in a gas-liquid contactor, for fractional hold up of gas = 0.1 and gas bubble diameter = 0.5 mm is given by (in m²/m³)

A.

 500

B.

 1200

C.

 900

D.

 800

Explanation :

Explanation Not Provided

Question 5.

The ratio of Murphree plate efficiency to point efficiency is 1 in a __________ flow model.

A.

 Plug

B.

 Perfectly mixed

C.

 Both A & B

D.

 Neither A nor B

Explanation :

Explanation Not Provided