Question

Very small dimensions, up to which value can be controlled using ECM?

(a) 0.01 mm

(b) 0.05 mm

(c) 0.07 mm

(d) 0.12 mm

The question was posed to me in my homework.

My question comes from ECM-Advantages and Disadvantages topic in section Electrochemical Processes of Advanced Machining

Answer 1

Right option is (b) 0.05 mm

Easiest explanation: Due to less electrode gap very small dimensions up to 0.05 mm can be controlled.