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A cutting plane on a drawing is indicated by a

  • A.continuous thick line drawn across the whole view
  • B.long chain line thickened at its ends and changes of direction
  • C.short-dashed line of uniform thin weight
  • D.continuous thin line with arrows at both ends

Answer: B

Correct answer: long chain line thickened at its ends and changes of direction

The cutting plane is a long chain line, thin along its length but thickened at each end and at every change of direction, with arrows at the ends showing the direction of viewing and capital letters identifying the section. The thickening marks exactly where the plane begins, ends and steps, which is what an offset section needs.

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