Question

Between which values does the frontal gap’s surface roughness vary?

(a) 0.02 to 0.13 µm

(b) 0.30 to 1.90 µm

(c) 1.93 to 2.64 µm

(d) 2.73 to 4.26 µm

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

I want to ask this question from ECM-Process Characteristics topic in chapter Electrochemical Processes of Advanced Machining

Answer 1

The correct answer is (b) 0.30 to 1.90 µm

The explanation: Surface roughness varies between 0.30 to 1.9 µm for frontal gap area.