GTU Civil Engineering (Semester 8)
Air Pollution Control
May 2015
Total marks: --
Total time: --
INSTRUCTIONS
(1) Assume appropriate data and state your reasons
(2) Marks are given to the right of every question
(3) Draw neat diagrams wherever necessary


1 (a) Discuss types of air pollutants and their sources.
7 M
1 (b) What are Photochemical oxidants? Discuss their effects.
7 M

2 (a) Discuss Bhopal Gas Tragedy, its reasons, its effects and the lesson which should be learnt by mankind.
7 M
2 (b) Discuss impact of air pollution on climate change and its subsequent effects.
7 M
2 (c) Sketch and describe the effects of air pollutants on plants leaves .
7 M

3 (a) What is CFC? What is its impact? Discuss in details.
7 M
3 (b) Discuss: Plume behaviour under different atmospheric conditions.
7 M
3 (c) Enlist the exhaust gases produced by an automobile. Discuss its remedial measures.
7 M
3 (d) What is a Hybrid car? How does it help to solve problem of vehicular pollution?
7 M

4 (a) Suggest alternatives for reducing pollution due to automobiles.
7 M
4 (b) Discuss effects of Carbon monoxide and Sulfur dioxide on human health.
7 M
4 (c) Discuss Process of adsorption for gaseous contaminants.
7 M
4 (d) Discuss application of scrubbers for removal of particulate matter from gas streams.
7 M

5 (a) Sketch and explain the principle, construction and working of a bag house filter.
7 M
5 (b) Discuss a gravitational settling chamber and its application. Calculate the minimum size of the particle that will be removed with 100 percent efficiency from a settling chamber under following conditions:
i) Particle : Specific gravity=2.0.
ii) Horizontal velocity=0.25 m/s.
iii) Temperature= 75°C
iv) Chamber
1) Length=8.0 m
2) Height=1.6 m
v) Viscosity of air at 75°C=2.0×10-5Kg/ms
vi) Take correction factor=2.
7 M
5 (c) Calculate effective height of a stack for following data:
i) Physical height of stack=150m.
ii) Inside diameter of stack=1.0m
iii) Wind velocity =3.20m/s
iv) Air temperature =12°C.
v) Barometric Pressure = 1000 millibars
vi) Stack gas velocity = 9 .6 m/s
vii) Stack gas temperature = 160°C.
7 M
5 (d) Sketch and explain working and use of a cyclone as particle removal device from the gas stream.
7 M



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