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A hidden edge is shown on an orthographic drawing as a

  • A.long chain thin line
  • B.continuous thin wavy line
  • C.short-dashed thin line
  • D.continuous thick line

Answer: C

Correct answer: short-dashed thin line

A hidden edge is one that exists but cannot be seen from that direction, and it is drawn as a thin line of short dashes. Keeping it thin and dashed distinguishes it at a glance from a visible outline, which is continuous and thick, and from a centre line, which is a long chain. Line type is the drawing’s vocabulary and each type means one thing.

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