Particle Size Measurements
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Questions and Answers

Which parameter is used to define the size of irregular particles?

  • Actual diameter
  • Equivalent diameter (correct)
  • Surface area
  • Density

    • What is the equivalent diameter of a particle?

  • The diameter of the particle
  • The diameter of a sphere with the same surface area as the particle
  • The diameter of a sphere with the same volume as the particle (correct)
  • The average diameter of the particle

    • How is the size of irregular particles determined?

  • By estimating the density of each particle
  • By determining the equivalent diameter of each particle (correct)
  • By measuring the actual diameter of each particle
  • By calculating the surface area of each particle

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