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Which of the following is not a source of moulding sand?

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in Casting-Forming-Welding I by (687k points)
Which of the following is not a source of moulding sand?

(a) Sea

(b) Lakes

(c) Desert

(d) Forests

I had been asked this question by my college director while I was bunking the class.

The doubt is from Molding Sands in division Molding and Core Sands of Casting-Forming-Welding I

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Correct option is (d) Forests

Explanation: There are a variety of soils which can be found in forests. But the soils found there cannot be used for casting purposes. Hence forests are not a source for finding moulding sand, whereas sea, lakes and deserts are a source of finding them.

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