Workshop Technology
The metal is subjected to mechanical working for

Reducing original block into desired shape
All of these
Refining grain size
Controlling the direction of flow lines

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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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Workshop Technology
Swab is used for

Moistening the sand around the edge before removing pattern
Smoothing and cleaning out depressions in the mould
Reinforcement of sand in the top part of the moulding box
Cleaning the moulding sand

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