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______________ requires less proportion of binders.

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in Foundry and Forging by (110k points)
______________ requires less proportion of binders.

(a) Natural Sand

(b) Synthetic Sand

(c) Loam Sand

(d) Silica Sand

The question was asked in final exam.

My question is taken from Requirements of the Base Sand in chapter Sand Moulding of Foundry and Forging

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Right choice is (b) Synthetic Sand

The best I can explain: Synthetic Sands are made by adding binders. Synthetic Sand properties are enhanced by adding external chemical agents which technically lessens the proportion of binders.

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