Manufacturing And Production Technology
Fixtures are used

To check the accuracy of workpiece
For holding the work in milling, grinding, planing or turning operations
None of these
For holding and guiding the tool in drilling, reaming or tapping operations

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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
Maintaining an electrolyte between the work and tool in a very small gap between the two
Direct contact of tool with the work
Using abrasive slurry between the tool and work

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