Maximum alumina content in high alumina refractory can be as high as _____________ percent?

A. Resistance to slag penetration
B. Resistance to CO attack
C. RUL
D. Permanent linear change

A. Green strength
B. Voids
C. Shrinkage
D. Both B. and C.

A. Bakelite impregnated or fused periclase
B. Silica
C. Semi-silica
D. Fireclay

A. Fireclay
B. Silica
C. Chrome magnesite
D. None of these

A. Chrome magnesite
B. Magnesite
C. Dolomite
D. Silicon carbide

A. At the hearth bottom of the furnace on which stock is placed
B. Used for furnace insulation
C. Used in the roof of the furnace
D. None of these