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The ____________ sand is the most versatile sand.

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The ____________ sand is the most versatile sand.

(a) Loam sand

(b) Chromite sand

(c) Kaolinite

(d) Olivine sand

The question was posed to me in an online interview.

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

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Correct choice is (d) Olivine sand

For explanation: The olivine sand contains all the minerals such as Fosterite (Mg2SiO4) and Fayalite (Fe2SiO4) which is suitable for almost all the type of casting manufacturing processes. The same mixtures can be used for a range of steels but it is very expensive.

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