1.

What happens to raw bricks if an excess of alumina is present?(a) Becomes hard(b) Becomes brittle(c) Decay(d) Shrinkage

Answer» The correct answer is (d) Shrinkage

Easy explanation: Raw bricks develop shrinkage, cracks, warping in presence of excess alumina.  Other three changes happen on burnt bricks or final brick product due to excess of other constituents.


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