Stoichiometry

A. Are not resistant to the action of basic slags
B. Combine with salts (e.g. chlorides sulphates etc.) & bases (e.g. lime, magnesia etc.) forming
fusible aluminates silicates etc
C. Shrink during firing
D. All A., B. and C.

A. Beehive coke ovens
B. By-product coke ovens
C. Dome of blast furnace stoves
D. Roof of open hearth furnace

A. High insulating properties
B. Low heat capacity
C. Low thermal conductivity
D. Greater strength

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

A. Beryllia
B. Carborundum
C. Corundum
D. Thoria

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. Increases
B. Decreases
C. Remain same
D. May increase or decrease

A. 1520-1630
B. 1630-1670
C. > 1730
D. > 2000

A. Spalling resistance
B. Refractoriness
C. Refractoriness under load (RUL)
D. None of these