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

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

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Manufacturing And Production Technology
Trepanning is an operation of

Making a cone-shaped enlargement of the end of a hole
Sizing and finishing a small diameter hole
Smoothing and squaring the surface around a hole
Producing a hole by removing metal along the circumference of a hollow cutting tool

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Manufacturing And Production Technology
When the temperature of a solid metal increases,

Strength of the metal increases but ductility decreases
Both strength and ductility of the metal increases
Strength of the metal decreases but ductility increases
Both strength and ductility of the metal decreases

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