Workshop Technology
Piercing is an operation of cutting

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

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Workshop Technology
In a hot chamber die casting machine

Ferrous alloys with low melting temperature are casted
Nonferrous alloys with high melting temperature are casted
Ferrous alloys with high melting temperature are casted
Nonferrous alloys with low melting temperature are casted

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Workshop Technology
A progressive limit gauge has

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

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