1.

If the measurement required is in three units, which scale would you prefer?(a) Plain(b) Comparative(c) Diagonal(d) Vernier

Answer» Right choice is (c) Diagonal

Easiest explanation: Diagonal scales are used when very minute distances such as 0.1 mm etc. are to be accurately measured or when measurements are required in three units; example- dm, cm and mm, or yard, foot and inch. While other options only give measurement in single unit.


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