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The ____________ process is employed to remove gases.

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in Foundry and Forging by (110k points)
The ____________ process is employed to remove gases.

(a) melting

(b) pouring

(c) scrapping

(d) refining

This question was posed to me in final exam.

This is a very interesting question from Sections in the Foundry in division Pattern Materials & Moulding Sand Tests of Foundry and Forging

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Correct answer is (d) refining

Easy explanation: The Refining is done to remove deleterious gases and elements from the molten metal to avoid casting defects. The material is added during the melting process to bring the final chemistry within a specific range specified by industry and/or internal standards.

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