Question

What are the values of voltages used in ECM?

(a) 1 to 8 V

(b) 10 to 30 V

(c) 40 to 80 V

(d) 90 to 110 V

The question was asked during an interview.

My question is taken from ECM-Theory of ECM topic in portion Electrochemical Processes of Advanced Machining

Answer 1

Right option is (b) 10 to 30 V

For explanation: Low voltages, ranging between 10 to 30 V are used in Electrochemical machining.