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Calibration of test instruments matters most when

  • A.the test is a routine rather than a type test
  • B.the machine is small rather than large
  • C.the result is close to the acceptance limit
  • D.the result is far away from the acceptance limit

Answer: C

Correct answer: the result is close to the acceptance limit

Where a result sits comfortably inside or outside the limit, a modest instrument error changes nothing. Near the boundary it decides the outcome, and an uncalibrated instrument may pass a machine that should fail or reject one that is sound. This is why calibration certificates are looked at hardest for marginal results.

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