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State whether the following is true or false.
A sample taken from the top of a stockpile is representative of the whole pile.

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

Answer: B

Coarse particles roll to the base and fines stay near the point of discharge, so the top of a pile is systematically finer than its average. A representative sample requires increments from many points, or sampling from a moving stream.

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