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A dimension should appear on a drawing

  • A.once only, on the view that shows the feature best
  • B.on every view in which the feature appears
  • C.twice, as a check against transcription error
  • D.only in the accompanying written specification

Answer: A

Correct answer: once only, on the view that shows the feature best

Repeating a dimension invites the two copies to disagree after a revision, and there is then no way to tell which is correct. So each dimension appears once, on the view where the feature is seen most clearly, and any figure repeated for information is enclosed in parentheses to show it is not to be worked to.

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