Manufacturing And Production Technology
In metal machining, the work-tool contact zone is a zone where heat is generated due to

None of these
Friction between the moving chip and the tool face
Burnishing friction
Plastic deformation of metal

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Manufacturing And Production Technology
In ultrasonic machining, the metal is removed by

Erosion caused by rapidly recurring spark discharges between the tool and work
Direct contact of tool with the work
Maintaining an electrolyte between the work and tool in a very small gap between the two
Using abrasive slurry between the tool and work

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