NPTEL Air pollution and Control Week 5 Assignment Answers 2024

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NPTEL Air pollution and Control Week 5 Assignment Answers 2024

1. What is the primary cause of exhaust emissions from vehicles?

  • Brake wear
  • Road resuspension
  • Incomplete combustion in the engine chamber
  • Evaporation of gasoline
Answer :- For Answer Click Here 

2. What pollutants are associated with non-exhaust emissions from vehicles?

  • PM10, PM2.5, and heavy metals
  • Carbon monoxide (CO)
  • Hydrocarbons (HC)
  • Nitrogen oxides (NOx)
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3. Which of the following air pollutants is NOT considered in the VAPI (Vehicular Air Pollution Inventory) model?

  • CO
  • CO2
  • PM
  • O3
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4. Emissions of which of the following air pollutants is NOT estimated by the GAINS model?

  • Heavy metals
  • PM
  • VOC
  • NH3
Answer :- 

5. What modes of operation are available for the GAINS (Greenhouse Gas and Air Pollution Interactions and Synergies) model?

  • Only in “optimization” mode
  • Only in “scenario analysis” mode
  • Only in “simulation” mode
  • In both “scenario analysis” and “optimization” modes
Answer :- 

6. There are emissions of various pollutants and GHGs from agricultural activities. Which of the following GHGs is released by livestock’s enteric fermentation and rice cultivation?

  • N2O
  • CO2
  • CH4
  • O3
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7. How do NH3 emissions from agricultural activities interact in the atmosphere, producing secondary inorganic aerosols?

  • React with CO2
  • React with CH4
  • React with SO2 and NOx
  • React with O3
Answer :- 

8. Which of the following is considered as a fuel combustion activity in the commercial sector?

  • Domestic cooking
  • Boiler operation
  • Fireplace use
  • Rural heating
Answer :- 

9. Aerosol Optical Depth expresses the quantity of light removed from a beam by ___ by aerosols during its path through the atmosphere.

  • Dispersion
  • Diffusion
  • Scattering
  • Adsorption
Answer :- 

10. What does Aerosol Optical Depth (AOD) correlate in satellite-based air quality monitoring?

  • Atmospheric pressure
  • Atmospheric temperature
  • Particulate concentrations
  • Wind velocity
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