# Separation Processes Questions and Answers – Membrane Materials-2

This set of Separation Processes Multiple Choice Questions & Answers (MCQs) focuses on “Membrane Materials-2”.

1. At what temperature is film stretching done?
a) Room temperature
b) Melting point of polymer
c) 100oc
d) 200oc

Explanation: Film stretching is done at melting point of polymer.

2. Which method is not employed in preparation of asymmetric membrane?
a) Precipitation by cooling
b) Track etching
c) Precipitation by evaporation
d) Precipitation by immersion in a solvent

Explanation: Track etching is not used in making asymmetric membranes.

3. What is a composite membrane?
a) Same as symmetric membrane
b) Same as asymmetric membrane
c) Asymetric membrane cast on a support
d) Two types of membrane are together

Explanation: A composite membrane functions like a asymmetric membrane but it is cast on a solid support.

4. Ceramic membrane is a type of:
a) Polymeric membrane
b) Liquid membrane
c) Inorganic membrane
d) Gas membrane

Explanation: Ceramic membrane is a type of inorganic membrane.

5. Microporous membrane s a type of
a) Ceramic membrane
b) Liquid membrane
c) Polymeric membrane
d) Inorganic membrane

Explanation: Microporous membrane is a type of polymeric membrane.
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6. What is the molar transmembrane flux of species if
Premeability P= 10 units
Membrane thickness l= 10units
Driving force = 500units
a) 500
b) 200
c) 400
d) 600

Explanation: Since P/l(driving force)= N, hence N= 500.

7. What is the molar transmembrane flux of species if
Premeability P= 10 units
Membrane thickness l= 5units
Driving force = 500units
a) 500
b) 200
c) 400
d) 1000

Explanation: Since P/l(driving force)= N, hence N= 1000.

8. What is the molar transmembrane flux of species if
Premeability P= 10 units
Membrane thickness l= 10units
Driving force = 200units
a) 500
b) 200
c) 400
d) 600

Explanation: Since P/l(driving force)= N, hence N= 200.

9. What is the molar transmembrane flux of species if
Premeability P= 50 units
Membrane thickness l= 10units
Driving force = 100units
a) 5000
b) 2005
c) 4003
d) 6000

Explanation: Since P/l(driving force)= N, hence N= 5000.

10. What is the molar transmembrane flux of species if
Premeability P= 10 units
Membrane thickness l= 100units
Driving force = 700units
a) 500
b) 20
c) 40
d) 70

Explanation: Since P/l(driving force)= N, hence N= 70.

Sanfoundry Global Education & Learning Series – Separation Processes.

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