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Silica refractories are also known as ______ refractories.

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Silica refractories are also known as ______ refractories.

(a) Acid

(b) Basic

(c) Neutral

(d) Magnesia

The question was posed to me in unit test.

This intriguing question originated from Properties of Refractories in division Refractories & Dielectric Materials of Engineering Material & Metallurgy

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Correct answer is (a) Acid

To explain: Silica containing refractories are referred to as silica or acid refractories. They possess a high-temperature capacity to withstand loads.  The common types of acid refractories are silica, aluminum silica, alumina, and silimanite.

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