Question

Which of the following materials can be machined using ECM?

(a) Hard nonconductive materials

(b) Hard conductive materials

(c) All nonconductive materials

(d) None of the mentioned

I have been asked this question during an interview for a job.

I would like to ask this question from ECM-Advantages and Disadvantages in section Electrochemical Processes of Advanced Machining

Answer 1

Correct option is (b) Hard conductive materials

To explain I would say: Hard conductive materials can be machined and nonconductive materials cannot be machined using ECM.