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Omitting the projection symbol from a drawing is serious because the component may be

  • A.given the wrong surface finish on its faces
  • B.manufactured as a mirror image of what was intended
  • C.made to the wrong overall dimensions
  • D.produced in the wrong material entirely

Answer: B

Reading a first angle drawing as third angle, or the reverse, transposes the side views and so reverses the part. Dimensions would be correct and the shape wrong, which is the most expensive kind of error to discover late.

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