railway RRB JE (CBT I + CBT II) Mock Test 2024 Production Engineering (Manufacturing) Machining Processes and Machine Tools
In electro discharge machining, the erosion of metal is achieved
1
by inducing high voltage current in the workpiece
2
by inducing low voltage current in the work piece
3
by the rapidly recurring spark discharges impinging against the surface of workpiece
4
by passing electrolyte solution between the workpiece and tool