Stack Effluent Dispersion Theories MCQ

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• For continuous point sources, the dispersion models are not based on which of the following?
  ক

  Plume behaviour

  খ

  Wind speed

  গ

  Plume temperature

  ঘ

  Eddy diffusion
• Which of the following is not a model used for plume rise modelling based on stability classification?
  ক

  Pasquill model

  খ

  Fick’s law

  গ

  ASME model

  ঘ

  McElroy model
• Fick’s molecular diffusion and Sutton’s statistical concepts are used for calculating dispersion models for which sources?
  ক

  Atmospheric stability

  খ

  Continuous point sources

  গ

  Instantaneous point sources

  ঘ

  Line sources
• Which law is used to determine the dispersion of air pollutants?
  ক

  Law of conservation

  খ

  Second law of thermodynamics

  গ

  First law of thermodynamics

  ঘ

  Fick’s law of molecular diffusion
• Why can’t plume rise expressions be accepted universally?
  ক

  They are empirical in nature

  খ

  Wind speed prediction is difficult

  গ

  Plume nature varies

  ঘ

  Height of the stack varies
• What is the expression for plume rise Δh? (hs – stack height)
  ক

  Δh buoyancy

  খ

  Δh buoyancy + Δh momentum

  গ

  Δh momentum + hs

  ঘ

  Δh buoyancy + hs
• Which of the following is not a factor plume rise depends on?
  ক

  Stack height

  খ

  Exit velocity

  গ

  Stack diameter

  ঘ

  Lapse rate
• What is meant by the effective stack height?
  ক

  Sum of stack height and plume rise

  খ

  Difference of stack height and plume rise

  গ

  Height of the plume

  ঘ

  Synonymous with the stack height
• Which of the following is not a factor upon which the emissions patterns from stacks depends?
  ক

  Wind profile

  খ

  Temperature of the wind

  গ

  Wind turbulence

  ঘ

  Distribution of temperature
• Which of the following is not a factor applied to evaluate the theories of plume rise?
  ক

  Wind speed

  খ

  Stack diameter

  গ

  Plume temperature

  ঘ

  Nature of the plume
• What are the two stages of dilution of air pollutant effluents?
  ক

  Plume rise and mixing

  খ

  Mixing and dispersion

  গ

  Plume rise and dispersion

  ঘ

  Diffusion and dilution