Question

What is the accuracy of comparison method used for calibration of polygons?

(a) ±0.1 seconds

(b) ±0.2 seconds

(c) ±0.3 seconds

(d) ±0.4 seconds

The question was asked in final exam.

I'm obligated to ask this question of Calibration of Polygons topic in division Angular Measurement and Circular Division of Engineering Metrology

Answer 1

The correct option is (c) ±0.3 seconds

The best explanation: If all the exterior angles of the upper polygon are compared with the angle between any two faces of the lower polygon then by comparison method of calibration of polygons, the accuracy of ± 3 seconds can be obtained.