JNTU
JNTU B.Tech III AIR POLLUTION AND CONTROL Previous Question Paper (March-2024 - R16)
Note: i) Question paper consists of Part A, Part B. ii) Part A is compulsory, which carries 25 marks. In Part A, Answer all questions. iii) In Part B, Answer any one question from each unit. Each question carries 10 marks and may have a, b as sub questions.
Part A
What is London smog?
Answer
London smog, also known as sulfurous or classical smog, is a type of air pollution characterized by a mixture of smoke and fog. It is primarily caused by the combustion of coal, which releases high concentrations of sulfur dioxide and particulate matter into the atmosphere under conditions of high humidity and temperature inversion.
Give the sources of air pollution.
Answer
Sources of air pollution are broadly classified into:
- Natural sources: Volcanic eruptions, forest fires, wind-blown dust, and pollen.
- Anthropogenic sources: Stationary sources (power plants, industrial boilers, refineries) and mobile sources (automobiles, aircraft, ships).
- Area sources: Residential heating, agricultural burning, and construction activities.
Mention the impacts of SOX on plants.
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What are the greenhouse gasses and their sources?
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What is the composition of gasses in troposphere and stratosphere?
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What is purpose of dispersion models?
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What is dry adiabatic lapserate?
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Explain the principle of electrostatic precipitator.
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What are the techniques for SOX and NOX analysis?
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How the NOX pollution is controlled in automobiles.
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Part B
Describe the point, non-point and line air pollution sources.
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What are the reasons for the production of ozone in the troposphere?
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What are the precursors for photochemical smog and explain the diurnal changes in the production of photochemical smog.
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How the secondary pollutants form?
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What are the impacts of aerosols?
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Why tropospheric ozone is called bad ozone and stratospheric ozone is called good ozone?
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How the VOC’s are produced in the amount and how VOCs are impacts the environment?
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Why the temperature difference is higher during the day between rural and urban areas?
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What are the factors important for good combustion and why?
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How to find out the unburnt hydrocarbon in a combustion process? Write the equation.
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What are the rate limiting factors for the formation of NOX.
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What is wind rose diagram and how it is useful for environmental management?
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Write down the different techniques available for particulate control.
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Discuss about different plume behavior at different lapserates.
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Gas viscosity (ugas) is 1kg/ms, inlet width (W) is 1.5m, effective turns (N) is 10, gas inlet velocity (vinlet) is 2ms, particle density (pparticle) is 0.1kg/m3, and gas density (pgas) is 0.01 kg/m3 calculate the cyclone separator cut diameter (dcut).
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Terminal drift velocity is 1m/s, Total collection area is 10m2, Volumetric air flow rate is 2m3/s. Calculate the collection efficiency of Electrostatic precipitator using Deutsch-Andersen Equation.
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Explain about adsorption process and write its application for the control of gaseous pollutants from stack emissions.
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Discuss about wet scrubbers.
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How to control the emissions in automobiles?
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How to monitor the SOX concentration in stack emissions? Explain the procedure.
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