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What is the least count of vernier bevel protractor?

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What is the least count of vernier bevel protractor?

(a) 10’

(b) 5’’

(c) 5’

(d) 10’’

This question was addressed to me in my homework.

The above asked question is from Vernier and Optical Bevel Protractor topic in section Angular Measurement and Circular Division of Engineering Metrology

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Best answer
Correct choice is (c) 5’

The best explanation: The least count of bevel protractor is 5’. It is commonly used for angular measurements where more precision is required like for angular measurement in workshops. Optical bevel protractors are the recent development of vernier bevel protractors.

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