Workshop Technology
Lancing is the operation of

Removal of metal to the desired shape from the edge of a plate
Cutting a sheet of metal in a straight line along the length
Bending a sheet of metal along a curved axis
Cutting a sheet of metal through part of its length and then bending the cut portion

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Workshop Technology
The purpose of a gate is to

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

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Workshop Technology
In permanent mould casting method

None of these
Molten metal is forced into mould under high pressure
Molten metal is poured in a metallic mould, retained in the mould long enough for the outer skin to solidify and finally mould is turned over to remove molten metal still in molten condition
Molten metal is poured and allowed to solidify while the mould is revolving

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