# Separation Processes Questions and Answers – Membrane Modules

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

1. What is a membrane module?
a) A membrane module is a representation of the type of pores in a membrane
b) A membrane module is a unit housing the membrane
c) A membrane is representation of an ideal membrane
d) A membrane module is representation of the concentration changes during separation

Explanation: A membrane module is a unit housing the membrane and its arrangement.

2. What is the use of cross flow in plate and frame module?
a) Reduces fouling
b) Reduces loss
c) Reduces efficiency
d) Increases efficiency

Explanation: Cross flow ensures that there is less fouling.

3. What is the packing density of plate and frame module?
a) 100-400m2/m3
b) 500-100m2/m3
c) 200-400 m2/m3
d) 500-1000 m2/m3

Explanation: The packing density of plate and frame module is 100-400 m2/m3.
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4. What is the packing density of spiral-wound module?
a) 100ft2/ft3
b) 200 m2/m3
c) 400 m2/m3
d) 1000 m2/m3

Explanation: The packing density if spiral-wound module is 100ft/ft3.

5. Which membrane module represents a spiral heat exchanger?
a) Plate and frame module
b) Spiral wound module
c) Hollow fibre module
d) No module exists

Explanation: A spiral wound module represents a spiral heat exchanger.

6. What is the life spiral-wound module?
a) 2 months
b) 10years
c) 2-3 years
d) 5-9 years

Explanation: The life of spiral wound module is 2-3 years.

7. What is the packing density of hollow-fibre module?
a) 200 ft2/ft3
b) 4000 ft2/ft3
c) 5000 ft2/ft3
d) 10000 ft2/ft3

Explanation: The hollow fibre module has high packing density of about 10000ft2/ft3.

8. Why is there a chance of fouling in hollow fibre module?
a) Fibres form a bundle and there is little free space
b) High packing density
c) Narrow pores
d) Excessive density of membrane material

Explanation: The hollow fibre membranes is sensitive to fouling as fibres form a bundle and there is little free space.

9. What is the alternate feed and permeate regions in plate and frame modules called as?
a) Spacers
b) Stop disk
c) Tie rod
d) Channel

Explanation: The alternate feed and permeate regions in plate and frame modules are called as spacers.

10. Which module is preferred for reverse osmosis operation?
a) Hollow fibre module
b) Plate and frame module
c) Spiral wound module
d) No module is used

Explanation: Spiral wound module is used for reverse osmosis operations.

Sanfoundry Global Education & Learning Series – Separation Processes.

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