Question

What are the values of gaps between the electrodes in EDM?

(a) 0.001 – 0.05 mm

(b) 0.01 – 0.5 mm

(c) 0.1 – 5 mm

(d) 1 – 15 mm

This question was addressed to me in an interview for internship.

My doubt is from EDM-Mechanism of Material Removal topic in section Thermal Processes of Advanced Machining

Answer 1

Correct choice is (b) 0.01 – 0.5 mm

Easiest explanation: In EDM, very small gaps that range between 0.01 – 0.5 mm are maintained.