Refractory Technology

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

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

A. Higher firing temperature
B. Higher moulding pressure
C. Finer grog size
D. All A., B. and C.

A. Thermal spalling
B. Slag attack
C. Fusion under load
D. CO attack

A. Crushing strength
B. Resistance to slag attack
C. Both A. and B.
D. Neither A. nor B.

A. Dead burnt magnesite ramming mass
B. Porous fireclay bricks
C. Semi-silica bricks
D. Silicon carbide bricks

A. 1350
B. 1715
C. 2570
D. 2800

A. 5-10
B. 10-25
C. 25-35
D. 35-50

A. Less load bearing capacity
B. Less resistance to slag attack
C. Low refractoriness
D. High resistance to thermal shock and creep

A. Al2O3. 2SiO2
B. 3Al2O3. 2SiO2
C. Al2O3. SiO2
D. 2Al2O3. 3SiO2