Manufacturing And Production Technology
Which of the following statement is correct about EDM machining?

The tool and work are never in contact with each other
All of these
It produces high degree of surface finish
It can machine hardest materials

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Manufacturing And Production Technology
In a CNC program block, N002 GO2 G91 X40 Z40......, GO2 and G91 refer to

Circular interpolation in counter clockwise direction and incremental dimension
Circular interpolation in clockwise direction and incremental dimension
Circular interpolation in counter clockwise direction and absolute dimension
Circular interpolation in clockwise direction and absolute dimension

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