Grog addition in fireclay during brick manufacture is done to_________________?

A. Producing monolithic linings
B. Patch work
C. Minimising the number of joints in the structure
D. All A., B. and C.

A. Soaking pit
B. Blast furnace
C. L.D. converter
D. Coke ovens

A. Less fusion point
B. Better spalling resistance
C. Both A. and B.
D. Neither A. not B.

A. Stable form of silica upto 870°C
B. Converted to Tridymite on firing between 870 to 1470°C
C. Transformed to Cristobalite on heating above 1470°C
D. All A., B. and C.

A. Decreases linearly
B. Remains unchanged
C. Increases
D. Decreases

A. Softening
B. Fracture due to uneven expansion at high temperature
C. Resistance to compressive loads
D. Resistance to chemical action of gases and molten fluxes