Q. Which of the following is a destructive method in measuring surface finish?

  • (A) gloss measurement
  • (B) taper sectioning
  • (C) diffraction technique
  • (D) micro interferometer
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✅ Correct Answer: (B) taper sectioning
Explanation: in taper sectioning method, a section is cut through the surface to be inspected at a shallow angle, thus magnifying height variations by a factor of cot theta, and the section is studied by optical microscope. it is an accurate but destructive method.

Published by Mr. Dubey ⭐ 104.82K Points at 21-Sep-2023 06:51 pm in Metrology and Measurements

Explanation by: Mr. Dubey
in taper sectioning method, a section is cut through the surface to be inspected at a shallow angle, thus magnifying height variations by a factor of cot theta, and the section is studied by optical microscope. it is an accurate but destructive method.

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