Workshop Technology
In a unilateral system of tolerance, the tolerance is allowed on

Both sides of the nominal size
One side of the actual size
Both sides of the actual size
One side of the nominal size

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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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