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A section is measured directly from the elevation of an obliquely cut prism and reported as the true shape. The figure will be

  • A.too large in the direction of the inclination
  • B.correct
  • C.correct only if the prism is square in plan
  • D.too small in the direction of the inclination

Answer: D

Correct answer: too small in the direction of the inclination

An inclined face is foreshortened in a principal view: the elevation shows its projected length rather than its real one, and the projection is always the shorter. Measuring from the elevation therefore understates the section in the direction of the inclination, which is precisely why an auxiliary view is projected.

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