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Q3 (5+5) (CILO2) The hollow electrode in an ECM operation has outer diameter =50mm and inner diameter =20mm. The applied current =1800 amps and the voltage =12 volts. The specific removal rate of work material is 3.42102mm3/As ). (a) If the process is 80% efficient, determine the rate of metal removal. (b) If the resistivity of the electrolyte =140ohmmm, find the working gap. Q4 (6+6) (CILO1) (a) What is high speed machining, and which tool materials are suitable for high-speed machining of steels? Can diamond work well for steel machining