Question

What is the accuracy of the working surfaces of multipurpose angle plates?

(a) 0.002 mm in 25 mm length

(b) 0.005 mm in 25 mm length

(c) 0.005 mm in 50 mm length

(d) 0.002 mm in 50 mm length

The question was asked in exam.

I'm obligated to ask this question of Angle Plates in section Linear Measurements of Engineering Metrology

Answer 1

Right choice is (a) 0.002 mm in 25 mm length

The best I can explain: Working surfaces and end surfaces of plates should be square within the accuracy of 0.002 mm in 25 mm length and 0.005 mm in 25 mm length respectively.