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Which of the following is used in checking the instruments to measure angles with great accuracy?

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Which of the following is used in checking the instruments to measure angles with great accuracy?

(a) Circular Vernier scale

(b) Plain scale

(c) Diagonal scale

(d) Comparative scale

I had been asked this question during an online exam.

My doubt is from Types of Scales in division Scales of Engineering Drawing

1 Answer

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The correct option is (a) Circular Vernier scale

Explanation: The circular Vernier scale is used to check the instruments to measure angles with high accuracy. They are used in measuring instruments like micrometer in mechanical engineering. They work on the same principle as the linear Vernier scale.

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