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

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

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Manufacturing And Production Technology
Glazing in grinding wheels can be decreased by

Using a softer wheel or by decreasing the wheel speed
Using a softer wheel or by increasing the wheel speed
Using a harder wheel or by decreasing the wheel speed
Using a harder wheel or by increasing the wheel speed

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Manufacturing And Production Technology
Shrinkage allowance on pattern is provided to compensate for shrinkage when

The temperature of metal drops from pouring to room temperature
The metal changes from liquid to solid state at freezing temperature
The temperature of solid phase drops from freezing to room temperature
The temperature of liquid metal drops from pouring to freezing temperature

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Manufacturing And Production Technology
A fixture is defined as a device which

All of these
Is used to check the accuracy of workpiece
Holds and locates a workpiece and guides and controls one or more cutting tools
Holds and locates a workpiece during an inspection or for a manufacturing operation

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