Question

As per IS 5359-1969, what is the permissible tolerance on mean diameter of the rollers in 100mm sine bars?

(a) 0.005 mm

(b) 0.001 mm

(c) 0.002 mm

(d) 0.01 mm

This question was posed to me during an online exam.

Question is from Sine Principle and Sine Bars topic in chapter Angular Measurement and Circular Division of Engineering Metrology

Answer 1

Right option is (c) 0.002 mm

Easiest explanation: As per IS 5359-1969, the permissible tolerances for mean diameters of rollers and distance between roller axes are 0.002 mm and ±0.03 mm respectively for sine bars of size 100 mm.