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Percentage of alumina in good brick earth should be about ________

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Percentage of alumina in good brick earth should be about ________

(a) 5-10%

(b) 20-30%

(c) 35-40%

(d) 45-60%

I have been asked this question in semester exam.

The origin of the question is Bricks topic in section Glass, Lime, Clay Products & Bricks of Construction & Building Materials

1 Answer

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Right choice is (b) 20-30%

Explanation: Percentage of alumina in good brick earth should be about 20-30%. Alumina is the main constituent of every kind of clay and it imparts plasticity to earth.

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