NPTEL Air Pollution and Control Week 6 Assignment Answers 2025
1. What is EPA’s AP-42 (2000) used for emission calculations?
- Modeling wind speed
- Measuring the concentration of gaseous pollutants
- Providing emission factors for pollutants not listed elsewhere
- Determining the thermal efficiency of fuels
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2. Where is a kerb site location typically found?
- Near a water body
- Alongside a pavement
- On the outskirts of a city
- Far from any pavement
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3. What is the primary goal of the bottom-up or source-based method?
- To ignore emissions sources
- To avoid documenting the potential for secondary aerosol formation
- To locate pollution sources and develop emission inventories
- To avoid chemical transport modeling
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4. In the mass balance equation given below, xij represents:
- The concentration of the jth species in the ith sample
- Source profile for the kth source
- The emission factor of a pollutant
- The meteorological factor influencing dispersion
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5. Which of the following pollutants are receptor models mainly used to analyze?
- Ozone (O3)
- Carbon dioxide (CO2)
- Particulate matter (PM)
- Nitric oxide (NO)
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6. What visual test is commonly used to assess the normality of data?
- Normal probability plots
- Pie charts
- Line graphs
- Bar charts
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7. Which is a common myth about air pollution?
- Air pollution occurs only outdoors
- Air pollution occurs indoors and outdoors equally
- Air pollution is harmless
- Air pollution is caused by poor air quality only
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8. Which of the following is NOT a cause of indoor air pollution?
- Air tightness of buildings
- Poorly designed air conditioning systems
- High altitudes
- Indoor sources of pollution
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9. How does excess oxygen affect the formation of carbon monoxide?
- It decreases the formation of CO
- It increases the formation of CO
- It has no effect on CO formation
- It makes CO more visible
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10. Where are levels of lead in soil typically higher?
- Near schools and playgrounds
- Near sources such as lead smelters, mines, and heavily trafficked roadways
- In urban parks
- Near agricultural fields using organic methods
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