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Vernier scale consists of two important parts, vernier scale and _________

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Vernier scale consists of two important parts, vernier scale and _________

(a) Secondary scale

(b) Initial scale

(c) Main scale

(d) Large scale

This question was posed to me by my school teacher while I was bunking the class.

This intriguing question originated from Scales in division Lettering Practice, Scales & Curves of Civil Engineering Drawing

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Best answer
Correct option is (c) Main scale

Explanation: The scale on the larger, fixed portion of the calliper. It gives the most significant digits in the reading, while the vernier is the sliding portion giving the least significant digits in the reading. It can be further divided into sub-parts as internal jaws, external jaws, locking screw etc.

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