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State whether the following is true or false.
The choice of grinding media is purely a matter of cost.

  • A.True
  • B.False
  • C.True only at large scales
  • D.False only at small scales

Answer: B

Density, hardness, chemical compatibility with the powder and the acceptable level of contamination all enter the decision. Cost is one consideration among several rather than the governing one. A cheap medium that spoils the batch is no economy at all.

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