Workshop Technology
The purpose of a riser is to

Deliver the molten metal from pouring basin to gate
Deliver molten metal into the mould cavity
Feed the molten metal to the casting in order to compensate for the shrinkage
Act as a reservoir for the molten metal

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Workshop Technology
In a simple die

Both cutting and non-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
Two or more cutting operations are performed at one station of the press in every stroke of the ram

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