Engineering :: Foundry Technology

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If an old casting is to be used as a pattern, to account for various allowances.

[A].	casting is shaken while withdrawing from mould	[B].	the surfaces are lagged with thin strips of wood or leater
[C].	the castings are cleaned and made smooth	[D].	to provide draw screws, holes can be drilled and tapped in the castings

Answer: Option B