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Which of the following scales represent two different units having the same representative fraction?

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Which of the following scales represent two different units having the same representative fraction?

(a) Plain scale

(b) Diagonal scale

(c) Comparative scale

(d) Vernier scale

This question was posed to me by my college professor while I was bunking the class.

The query is from Types of Scales in portion Scales of Engineering Drawing

1 Answer

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Best answer
Right option is (c) Comparative scale

The best explanation: Comparative scales are those in which two different units are measured by using different graduations but have a same representative fraction. A drawing can be read in two units with the help of this scale.

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