Refractory Technology

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. Spalling rate
B. Fusion point
C. Shrinkage ability
D. None of these

A. Wetting characteristics
B. Refractoriness
C. Thermal conductivity
D. Both B. and C.

A. Does not react with basic slags
B. Is produced from baddeleyite
C. Cannot be used as an insulator
D. Has poor electrical conductivity at high temperature

A. Exhibit wetting characteristics
B. Should be used in neutral or reducing atmosphere
C. Exhibit high shrinkage on thermal treatment
D. Are not resistant to corrosion by slag

A. Segar cones
B. Orton cones
C. Pressure vessels
D. Ovens & retorts

A. Side walls of soaking pits and arc furnaces
B. Copper melting furnaces & converters
C. Burner block of glass tanks
D. All A., B. and C.

A. Silica
B. Fireclay
C. Dolomite
D. Magnesite

A. Silica bricks
B. Fireclay bricks
C. High alumina bricks
D. Tar dolomite bricks

A. Quartz
B. Cristobalite
C. Tridymite
D. None of these