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Proof testing a batch of ceramic components involves

  • A.firing every component through a second time
  • B.loading every one above its service stress
  • C.testing a random sample of them to destruction
  • D.measuring the bulk density of each component

Answer: B

Survivors are known to be free of flaws above a certain size, and the failures are removed. The cost is the loss of the pieces that break and the possibility of damaging those that survive. Proof testing is reserved for components where failure is unacceptable.

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