Addition of grog in fireclay brick during its manufacture is advantageous, because it results in

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NA

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less shrinkage in heating, decreased apparent porosity & increased specific gravity.

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high strength & thermal spalling resistance.

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less addition of water to get a workable plasticity & lesser time required for drying the raw refractories and hence increased rate of production.

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all (a), (b) and (c).

1.	Addition of grog in fireclay brick during its manufacture is advantageous, because it results in
A.	less shrinkage in heating, decreased apparent porosity & increased specific gravity.
B.	high strength & thermal spalling resistance.
C.	less addition of water to get a workable plasticity & lesser time required for drying the raw refractories and hence increased rate of production.
D.	all (a), (b) and (c).
Answer» E.

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