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_____________ is used to make a metallic die in Investment mould.

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in Foundry and Forging by (110k points)
_____________ is used to make a metallic die in Investment mould.

(a) Sweep Pattern

(b) Master Pattern

(c) Single Piece Pattern

(d) Skeleton Pattern

I got this question in an online interview.

This intriguing question comes from Type of Sand Moulds topic in portion Sand Moulding of Foundry and Forging

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Right option is (b) Master Pattern

For explanation I would say: The surface finish and the accuracy in dimensions of the castings are high in Investment mould. Hence, the master pattern is used in the Investment mould. The pattern is reusable as well.

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