Workshop Technology
In a simple die

Two or more cutting operations are performed at one station of the press in every stroke of the ram
Two or more operations are performed simultaneously at the single stroke of the ram
None of the listed here
Both cutting and non-cutting operations are performed at one station of the press in every stroke of the ram

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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 cylindrical hole 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

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Workshop Technology
During hot working of metals

Porosity of the metal is largely eliminated
All of the listed here
Mechanical properties are improved due to refinement of grains
Grain structure of the metal is refined

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