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Bulk density quoted for a silo calculation should be

  • A.the tapped density as measured in the laboratory
  • B.the true density of the mineral itself when solid
  • C.the consolidated density under the head expected
  • D.the loose poured density of a freshly taken bulk sample

Answer: C

Material at the bottom of a deep silo is compressed by everything above it, so it is denser than a poured sample and much denser than the loose figure suggests. Using the wrong one underestimates both the mass stored and the wall loads.

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