Engineering Questions with Answers - Multiple Choice Questions

# Separation Processes MCQ’s – Membrane Modules

1 - Question

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 - Question

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 - Question

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.

4 - Question

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 - Question

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 - Question

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 - Question

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 - Question

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 - Question

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 - Question

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