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A form of cast iron in which free carbon is present in the form of nodules in the matrix of cementite and ferrite. This form of cast iron is ____________

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A form of cast iron in which free carbon is present in the form of nodules in the matrix of cementite and ferrite. This form of cast iron is ____________

(a) Malleable iron

(b) Pig iron

(c) Wrought iron

(d) None of these

I had been asked this question in an international level competition.

I'm obligated to ask this question of Mold Materials topic in division Molding and Core Sands of Casting-Forming-Welding I

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The correct choice is (a) Malleable iron

The explanation: Malleable iron is one type of cast iron in which free carbon is present in the form of nodules in the matrix of cementite and ferrite.

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