When the metal is removed by erosion caused by rapidly recurring spark discharges between the tool and work, the process is known as

When the metal is removed by erosion caused by rapidly recurring spark

1.	When the metal is removed by erosion caused by rapidly recurring spark discharges between the tool and work, the process is known as
A.	lectrochemical machining
B.	lectro-discharge machining
C.	ltrasonic machining
D.	one of these
Answer» C. ltrasonic machining

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When the metal is removed by erosion caused by rapidly recurring spark discharges between the tool and work, the process is known as

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