Workshop Technology
In a unilateral system of tolerance, the tolerance is allowed on

One side of the actual size
Both sides of the actual size
One side of the nominal size
Both sides of the nominal size

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Workshop Technology
In permanent mould casting method

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
None of these

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