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Normal shrinkage allowance for aluminium is 18 mm per metre and that for cast iron 10 mm per metre. If the metal pattern is to be made of aluminium and the casting is to be of cast iron, the shrinkage allowed on wooden master pattern will be

[A].	8 mm/metre	[B].	10 mm/metre
[C].	18 mm/metre	[D].	28 mm/metre

Answer: Option D

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