Engineering Questions with Answers - Multiple Choice Questions
Separation Processes MCQ’s – Separation in Membranes-2
1 - Question
Which of the following is not true about membrane separations?
a) Components which are passed through the membrane is called permeate
b) Components which are not passed through are called retentate
c) Non-porous membrane is never used
d) Membrane separations require a driving force
View Answer
Explanation: Non-porous membranes are called as dense membranes and are used.
2 - Question
What is the driving force in Microfiltration?
a) Pressure difference
b) Pervaporation
c) Difference in fugacity
d) Concentration difference
View Answer
Explanation: Pressure difference is the driving force in microfiltration.
3 - Question
What is the driving force in Dialysis?
a) Pressure difference
b) Pervaporation
c) Difference in fugacity
d) Concentration difference
View Answer
Explanation: Concentration difference is the driving force in dialysis.
4 - Question
What is the driving force in pervaporation?
a) Pressure difference
b) Activity difference
c) Difference in fugacity
d) Concentration difference
View Answer
Explanation: The driving force in pervaporation is the activity difference.
5 - Question
What is the driving force in gas separation?
a) Pressure difference
b) Pervaporation
c) Difference in fugacity
d) Concentration difference
View Answer
Explanation: The driving force in gas separation is difference in fugacity.
6 - Question
The selection of membrane does not depend on which property?
a) Pore size distribution
b) Water permeability
c) Perporometry
d) Film thickness formed
View Answer
Explanation: The film thickness formed is not a property that is taken into account when deciding the membrane.
7 - Question
What is the bubble point method used for?
a) To determine the pore size distribution
b) To determine size of all pores
c) To determine size of largest pore
d) To determine membrane thickness
View Answer
Explanation: The bubble point method is for determining the size of the largest pore.
8 - Question
What is perporometry used for?
a) To determine the size distribution of active pores
b) To determine the size distribution of the dead pores
c) To determine the size distribution of the membrane
d) To see the permeability of the solvent through the membrane
View Answer
Explanation: Perporometry is used to determine the size distribution of the active pores.
9 - Question
How is the resistance to solvent flow determined?
a) By measuring pore size distribution
b) By measuring amount of air passing
c) By measuring the volume of solvent passed after a certain time
d) By calculating water permeability
View Answer
Explanation: The resistance to solvent flow can be determined by calculating water permeability. The water is passed through the membrane at a given pressure gradient.
10 - Question
What is the advantage of track etching?
a) Pores are large
b) Narrow size distribution
c) Dense membrane
d) Less expensive
View Answer
Explanation: The advantage if track etching is that there are straight pores and narrow size distribution.