Workshop Technology
The property of sand due to which it evolves a great amount of steam and other gases is called

Adhesiveness
Collapsibility
Permeability
Cohesiveness

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Workshop Technology
In permanent mould casting method

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
None of these
Molten metal is forced into mould under high pressure

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