Workshop Technology
A progressive limit gauge has

'Go' member at one end and 'Not go' member at the other end
Separate 'Go' and 'Not go' members
None of the listed here
'Go' and 'Not go' member on the same side of the gauge

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Workshop Technology
Piercing is an operation of cutting

A number of holes evenly spaced in a regular pattern on a sheet of metal
A flat sheet to the desired shape
A hole (other than cylindrical) in a sheet of metal by the punch and the die
A cylindrical hole in a sheet of metal by the punch and the die

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