Q. Which of the following is the direct measure of surface finish in Wallace surface dynamometer?

  • (A) time of swing
  • (B) angle of swing
  • (C) length of swing
  • (D) height of swing
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✅ Correct Answer: (A) time of swing
Explanation: in the case of wallace surface dynamometer, if the surface to be tested is smooth, there will be less friction and pendulum swings for a longer time period. so, time of swing of pendulum is a direct measure of surface finish.

Published by Mr. Dubey ⭐ 111.54K Points at 21-Sep-2023 06:51 pm in Metrology and Measurements

Explanation by: Mr. Dubey
in the case of wallace surface dynamometer, if the surface to be tested is smooth, there will be less friction and pendulum swings for a longer time period. so, time of swing of pendulum is a direct measure of surface finish.

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