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Mass flow in a silo means that

  • A.the silo is filled and emptied by mass rather than by volume
  • B.all the material is in motion whenever any is withdrawn
  • C.the silo empties completely once a shift
  • D.material flows only through a central channel

Answer: B

In mass flow the whole contents move, so the material discharges first in first out and no stagnant region forms. Funnel flow, its alternative, moves a central core and leaves the rest standing until the silo is run right down.

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