Name of the College : SREE CHAITANYA COLLEGE OF ENGINEERING
University : JNTUH
Department : Civil Engineering
Subject Code/Name :07A70108/AIR POLLUTION AND CONTROL
Year/Sem : IV/I
Website : scce.ac.in
Document Type : Model Question Paper
Download Model/Sample Question Paper : https://www.pdfquestion.in/uploads/scce.ac.in/4899-07A70108-AIRPOLLUTIONANDCONTROL.pdf
Air Pollution & Control Question Paper :
IV B.Tech I Semester Examinations,December 2011
Time: 3 hours
Max Marks: 80
Related : Sree Chaitanya College Of Engineering 07A70109 Ground Improvement Techniques B.Tech Question Paper : www.pdfquestion.in/4898.html
Answer any FIVE Questions :
All Questions carry equal marks :
1. List the various procedures for controlling the emission of NOx. Explain, how do you reduce the emissions of NOx by:
(a) Non Selective catalytic reduction.
(b) Electron beam irradiation. [16]
2. (a) Define air quality standards. How do you express the emission?
(b) Explain any three methods for determining Air Pollution index. [6+10]
3. (a) Discuss composition of Natural Gas.
(b) Discuss origin and properties of Natural gas. [10+6]
4. (a) Discuss the phenomenon of ozone layer depletion.
(b) Describe the history of green house eects. [8+8]
5. (a) What are the applications of electro static precipitators in various industries?
(b) A cylindrical electrostatic precipitator of diameter 0.3m is used for separating pulverized coal yash particles from a furnace gas stream.
If the volumetric flow rate of the gas is 0.05 m3/sec, what will be the length of precipitator for obtaining a collection eciency of 99.9%. What percent change in electrode collection area is required to increase the collection eciency from 99.9 to 99.95%? [8+8]
6. A thermal power burns 5.45 tonnes with 4.2% sulphur per hour and discharges through a stack of 75m eective height, average wind speed at top of stack is 6m/s. with moderate stable atmosphere, calculate max. GLC and the corresponding distance. [16]
7. (a) Explain any two major Air-Pollution disasters. How did these disasters challenge the environmentalists?
(b) Explain the term Green House Eect and the causes. Describe the globalscenario of the same. [9+7]
8. (a) Discuss the sources of Asbestos and Barium air pollutants.
(b) How domestic combustion of fuel contributes to the air pollution?
(c) Dierentiate between the automobiles using petrol and diesel fuels from air pollutants generation point of view. [4+6+6]
Code No: 07A70108
R07 Set No. 4
1. (a) Explain the eect of water bodies, ridges, valleys, terrain roughness on pollutant dispersion.
(b) Write a short notes on air pollution modelling. [10+6]
2. What are the various dry methods of control of SOx? Explain how do you control SOx by the following processes:
(a) SCOT Process
(b) Use of Metal oxides. [16]
3. (a) Most of the three wheelers of para transit transport (Auto-Rickshaws)are converted to CNG engines. Give your comments from air pollution point of view.
(b) Enlist the specific air pollutants. Explain the eects on human health of the same.
(c) Discuss the visibility impairment and the economic losses due to air pollution. [7+5+4]
4. (a) Write short notes on Emission standards for mobile sources.
(b) Write a short notes on:
i. Rating scales for indices
ii. Dissemination techniques for air pollution indices
iii. Index monitoring guidelines. [4+12]
5. (a) Describe the scenario of air pollutants generated in automobiles and Industrial processes.
(b) India’s one of the most widely used fossil fuels is coal. How does it affect our environment from air pollution point of view.
(c) Discuss the properties of oxides of sulphur with reference to air pollution.[6+7+3]
6. (a) Describe the eects of ozone holes on flora and fauna.
(b) Explain briefly the history of Ozone holes. [9+7]
7. (a) Explain the phenomenon of `Front’, in case of air mixing. How does it affect the air pollutants’ dispersion?
(b) Explain the following terms:
i. Fumigation
ii. Trapping
iii. Lofting. [10+6]
8. (a) What is the minimum size of the particulates removed though the following control equipments:
i. Settling chambers
ii. Cyclones
iii. Fabric filters
iv. ESP’s
(b) Design a parallel type electrostatic precipitator with 10 channels to handle 10,000 m3hr of gas for eciency of 99%. [6+10]