[Solved] Which of the following material cannot be machined using ECM?

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Q.	Which of the following material cannot be machined using ECM?
A.	high strength alloys
B.	hardened steels
C.	nonconductive materials
D.	all of the mentioned
Answer» C. nonconductive materials
Explanation: ecm can be used for machining high strength alloys and hardened steels which led to many cost-saving applications.

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