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

Direct contact of tool with the work
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
Using abrasive slurry between the tool and work

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Manufacturing And Production Technology
Which of the following statement is correct for oblique cutting system?

The cutting edge is inclined at an angle less than 90° with the normal to the velocity of the tool
The chip flows on the tool face at an angle less than 90° with the normal on the cutting edge
Frequently, more than one cutting edges are in action
All of these

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