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Air Pollution and Control Week 5 NPTEL Assignment Answers 2025

By / February 16, 2025

NPTEL Air Pollution and Control Week 5 Assignment Answers 2025

1. Which of the following limitations is/are NOT associated with the EMPA model used for estimating vehicular emissions?
(i) Inclusion of a catalyst model should lead to improvements in the existing model
(ii) It has been developed only for Light Duty Vehicle
(iii) Include the dynamic behavior of the engine

  • (i), (iii)
  • (ii)
  • (iii)
  • (i), (ii) & (iii)
Answer :- For Answers Click Here

2. Which of the following air pollutants is NOT considered in the VAPI (Vehicular Air Pollution Inventory) model?

  • CO
  • CO2
  • PM
  • O3
Answer :-

3. What is the primary purpose of the MARKAL (MARKet ALlocation) model?

  • To assess the economic growth of developing countries
  • To model energy systems and compliance with climate change agreements
  • To monitor air quality and pollution
  • To optimize agricultural productivity
Answer :-

4. What is the primary focus of the GAINS model?

  • Managing international energy trade agreements
  • Estimating costs and potentials for air pollution control and GHG mitigation
  • Monitoring local air quality using satellite imagery
  • Predicting future changes in rainfall patterns due to pollution
Answer :-

5. Which of the following pollutants is primarily emitted from livestock enteric fermentation and rice cultivation?

  • Methane (CH4)
  • Nitrous oxide (N2O)
  • Ammonia (NH3)
  • Fine particulate matter (PM2.5)
Answer :- For Answers Click Here

6. What source contributes to the release of volatile organic compounds (VOCs) in agriculture?

  • Metabolic processes of vegetation and livestock
  • Fertilization of soils
  • Diesel engines in machinery
  • Both (a) and (c)
Answer :-

7. What activities are covered under the residential sector in relation to fuel combustion?

  • Heating, boiler operation, and commercial cooking
  • Domestic cooking and use of fireplaces
  • Captive power generation in offices
  • Waste management and recycling
Answer :-

8. Which of the following facilities are commonly found in urban areas contributing to commercial sector emissions?

Hospitals, shopping malls, and crematoriums
Agricultural fields and farmhouses
Rural community centers and livestock farms
Schools and public parks

Answer :-

9. Which component is used to detect CO, CO2, and HC in transport emission inventory using remote sensing?

  • Twin dispersive ultraviolet (UV) spectrometer
  • Non-dispersive infrared (NDIR) component
  • Laser interferometer
  • Gas chromatography
Answer :-

10. What is the primary purpose of Aerosol Optical Depth (AOD)?

  • To express the quantity of light removed by aerosols in the atmosphere
  • To measure the concentration of NO2 in urban areas
  • To determine the source of gaseous emissions
  • To calculate the pH level of rainwater
Answer :- For Answers Click Here

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