NPTEL Air Pollution and Control Week 11 Assignment Answers 2025
1. In 1991, which of the following protocols was related to the control of emissions of volatile organic compounds (VOCs) or their transboundary fluxes?
- Geneva protocol
- Gothenburg Protocol
- Stockholm Convention
- Helsinki Protocol
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2. What is the primary goal of the Paris Agreement under the UNFCCC?
- To phase out ozone-depleting substances
- To limit global temperature rise to well below 2°C above pre-industrial levels
- To monitor and control air pollution in urban areas
- To eliminate greenhouse gas emissions entirely by 2030
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3. Which treaty focuses on reducing ozone-depleting substances?
- Kyoto Protocol
- Gothenburg Protocol
- Montreal Protocol
- Stockholm Convention
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4. What was an unintended consequence of improved air quality during lockdowns?
- Decrease in ozone levels in some regions
- Increased indoor air pollution
- Reduced visibility in urban areas
- A slight increase in ground-level ozone in certain cities
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5. To control the dust pollution at the construction site, which one of the mitigation measures would be most effective.
- Fogging system
- Ban on refuse burning
- Vehicle usage controls
- Bike parking facilities
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6. Which of the following mitigation strategies is focused to reduce the emissions from enhanced the use of clean fuel in rural and urban areas?
- Congestion pricing
- Non-motorised transportation
- Pradhan Mantri Ujjwala Yojana
- Auto Fuel Policy
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7. Blending of_______ methanol in gasoline can bring down GHG emissions by 20% in terms of particulate matter, NOx, and SOx, thereby improving the urban air quality.
- 10%
- 15%
- 20%
- 25%
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8. What is a finely divided, carbon-rich, porous substance that can be obtained from the crop stubble through the process of Pyrolysis.
- Composting
- Biochar
- Mechanical processing
- Happy seeder
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9. What is the size range of PM10 particles?
- Greater than 10 microns
- Less than 10 microns in diameter
- Between 10 and 50 microns
- Exactly 10 microns
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10. What is the 24 hour National Ambient Air Quality Standard (NAAQS) of PM10 for the residential area (in μg/m3) ?
- 40
- 60
- 80
- 100
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