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

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

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Manufacturing And Production Technology
The strength of a brazed joint

Decreases with increase in gap between the two joining surfaces
Increases up to certain gap between the two joining surfaces beyond which it decreases
Decreases up to certain gap between the two joining surfaces beyond which it increases
Increases with increase in gap between the two joining surfaces

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