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Which of the following is the most basic binder used in the molding sand?

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in Foundry and Forging by (110k points)
Which of the following is the most basic binder used in the molding sand?

(a) Clay

(b) Zircon

(c) Alumina

(d) Manganese oxide

The question was posed to me during an online exam.

My question comes from Moulding Sand Binders and Additives in chapter Pattern Materials & Moulding Sand Tests of Foundry and Forging

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Best answer
Correct answer is (a) Clay

Easy explanation: Even though the major portion of the molding sand in silica (96%), clay and water form the binder component of this sand. It is used to provide these sand grains adhesive property so that the grains stick to the pattern to form a casting of appropriate and required shape.

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