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A line perpendicular to the vertical plane appears in the elevation as

  • A.its true length
  • B.a foreshortened length
  • C.a line inclined to the reference line
  • D.a point

Answer: D

Correct answer: a point

A line perpendicular to a plane of projection is seen end on from that direction, so every part of it falls on the same spot and it projects as a point. Perpendicular to the vertical plane means a point in the elevation and a true length in the plan; the horizontal case gives the mirror image.

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