Workshop Technology
When a hole or cavity to be cored is not in line with the parting surface, then a ________ is used.

Balanced core
Horizontal core
Vertical core
Drop core

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Workshop Technology
Piercing is an operation of cutting

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
A flat sheet to the desired shape

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