.When the metal is removed by erosion caused by rapidly recurring spark discharges between the tool and work, the process is known as Options: A . &nbspelectro-chemical machining B . &nbspelectro-discharge machining C . &nbspultra-sonic machining D . &nbspnone of these

.When the metal is r

Question

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

Options:

A . electro-chemical machining

B . electro-discharge machining

C . ultra-sonic machining

D . none of these

Answer: Option B

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