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What is the flatness tolerance of acute angle attachment?

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What is the flatness tolerance of acute angle attachment?

(a) 0.005mm

(b) 0.0005mm

(c) 0.5mm

(d) 0.00005mm

I have been asked this question in an online interview.

The origin of the question is Vernier and Optical Bevel Protractor topic in division Angular Measurement and Circular Division of Engineering Metrology

1 Answer

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Best answer
The correct choice is (a) 0.005mm

Easiest explanation: Acute angle attachment can be fitted into the body. It can be clamped in any position. Working edge of acute angle attachment should be parallel to the working edge of the stock within 0.015 mm and flat to within 0.005 mm over the entire length of attachment.

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