Question

What are the tolerances that are achieved using ECH process?

(a) ± 0.001 mm

(b) ± 0.002 mm

(c) ± 0.003 mm

(d) ± 0.004 mm

I had been asked this question at a job interview.

The doubt is from ECH-Process Characteristics, Applications in division Hybrid Electrochemical Processes of Advanced Machining

Answer 1

Right choice is (c) ± 0.003 mm

The explanation is: The value of the tolerances that are achieved during machining in ECH is about ± 0.003 mm.