NPTEL Air pollution and Control Week 4 Assignment Answers 2024

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NPTEL Air pollution and Control Week 4 Assignment Answers 2024

1. What is assumed in the Gaussian Plume Model regarding the time required for pollutants to travel to the receptor?

  • Wind speed variations
  • Molecular Diffusion
  • Buoyancy effects
  • Steady state
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2. What is an advantage of the Gaussian Plume Model regarding its response time?

  • Slow response time
  • Immediate response time
  • Time-consuming calculations
  • Dependence on supercomputers
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3. What is the assumed ground condition in deriving the expression for pollutant concentration from a line source?

  • Elevated surface
  • Uneven terrain
  • Ground level surface
  • Water surface
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4. In what direction is the wind assumed to be blowing in the context of the line source model?

  • Parallel to the line
  • Perpendicular to the line
  • Diagonal to the line
  • Variable direction
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NPTEL Air pollution and Control Week 4 Assignment Answers 2024
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6. What is the potential consequence of low ventilation coefficient?

  • Improved air quality
  • Stagnation and poor air quality
  • Increased assimilative capacity
  • Enhanced pollutant disposal
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7. The height of the layer in which air pollutants or any constituents emitted or entrained into it is vertically dispersed due to turbulence and convection; it is called

  • Mixing height
  • Effective height
  • Plume rise
  • Ventilation coefficient
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8. The available assimilation capacity (AAC) is given as

  • AAC = Permissible Standard (NAAQS) – Ambient Pollutant concentration
  • AAC = Permissible Standard (NAAQS) + Ambient Pollutant concentration
  • AAC = Permissible Standard (NAAQS) x Ambient Pollutant concentration
  • AAC = Permissible Standard (NAAQS) / Ambient Pollutant concentration
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9. The basic equation for emission estimation is

  • Emission = Emission Factor – Activity Data
  • Emission = Emission Factor + Activity Data
  • Emission = Emission Factor × Activity Data
  • Emission = Emission Factor / Activity Data
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10. What does an Emission Factor (EF) represent in the context of air pollution modelling?

  • Random emission data
  • Mass of pollutants released per unit volume of raw material
  • Dispersion coefficient
  • Gridded emission inventory
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