Manufacturing And Production Technology
Tool life is measured by the

Number of pieces machined between tool sharpenings
Volume of material removed between tool sharpenings
All of the listed here
Time the tool is in contact with the job

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

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

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