Workshop Technology
In a ___ two or more operations are performed simultaneously at the single stroke of the ram.

Compound die
Simple die
Progressive die
Combination die

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Workshop Technology
The purpose of a riser is to

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

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