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What is the chief purpose of layers in a CAD drawing?

  • A.to separate categories of information for control
  • B.to store successive revisions of the same drawing
  • C.to hold the drawing at several different scales
  • D.to record who drew each part of the geometry

Answer: A

Putting centre lines, hidden detail, dimensions and hatching on their own layers lets each be given its line type and colour once and be turned off when not wanted. It is what makes one drawing serve several purposes without being redrawn.

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