Chromite refractories are used in_______________?

A. Firebrick
B. Sillimanite
C. Semi-silica
D. Aluminous firebrick

A. Increased by the addition of basic oxides
B. Reduced by the addition of basic oxides
C. Not affected by the addition of basic oxides
D. Always more than 2500°C

A. High porosity
B. Low thermal conductivity
C. Both A. and B.
D. Neither A. not B.

A. Have better spalling resistance than chrome magnesite refractories
B. Have very low thermal co-efficient of expansion
C. Are not at all resistant to the corrosive action of iron oxide
D. Have very low (50 kg/cm2) cold crushing strength (C.C.S.), and cannot be used in metalcase
form

A. Fireclay
B. Silicon carbide
C. Corundum
D. Siliceous fireclay

A. Mullite
B. Corundum
C. Bauxite
D. Dolomite