Q.

During wire cut EDM, the size of the cavity produced by the wire while machining depends upon            

A. material of the workpiece
B. di-electric fluid used
C. wire material
D. electric current
Answer» D. electric current
Explanation: while machining a high electric current passes through the dielectric fluid and heats the workpiece surface from a very small area. the corresponding workpiece area melts and what is left, is a small round cavity. the cavity size depends on the electric current and potential.
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