NPTEL Air pollution and Control Week 3 Assignment Answers 2024

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NPTEL Air pollution and Control Week 3 Assignment Answers 2024

1. What critical relationship exists between atmospheric stability and pollutant concentrations in relation to plumes? 

  • Horizontal motion of air parcels
  • Vertical motion of air parcels
  • Atmospheric pressure variation
  • Pollutant adhesion to surfaces
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2. Which of the following plume types exists under the neutral lapse rate when wind speed is greater than 32 km per hour?

  • Looping
  • Fanning
  • Coning
  • Lofting
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3. What is the property of a plume that influences the dispersion of air pollutants?

  • Wind speed
  • Exit velocity
  • Atmospheric stability
  • Turbulence
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4. Turbulence consists of irregular swirls of motion of wind called________________? 

  • Uniform wind patterns
  • Wind direction
  • Eddies
  • Atmospheric stability
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5. What does the Mixing Height determine in relation to pollutants?

  • Wind direction
  • Volume of atmosphere available for dispersion
  • Atmospheric temperature
  • Solar radiation levels
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6. Why is air monitoring carried out in places of high natural environmental value?

  • To assess natural disasters
  • To evaluate urbanization
  • To understand population density
  • To preserve natural ecosystems
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7. What types of monitoring are included in the air quality monitoring network in India?

  • Only online monitoring
  • Only manual monitoring
  • Both online and manual monitoring
  • Periodic monitoring
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8. When does eclipsing occur in the context of air pollution indices?

  • When pollution is overestimated
  • When concentrations of pollutants are within acceptable limits
  • When pollution is underestimated
  • When historical data is missing
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9. Which type of air quality models deal with pollutants like PM, SO2, and CO?

  • Reactive models
  • Long-term models
  • Non-reactive models
  • Trajectory models
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10. How are Screening models characterized in terms of their complexity and input data requirements? 

  • Detailed treatment of physical and chemical atmospheric processes
  • Simple estimations with worst-case meteorological conditions
  • Complex estimations with worst-case meteorological conditions
  • Trajectory-based calculations
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