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
A. Firebricks
B. Silica bricks
C. Silicon carbide bricks
D. Sillimanite
A. Soaking pit
B. Blast furnace
C. L.D. converter
D. Coke ovens
A. Are stored under controlled temperature & humidity to avoid hydration
B. Are used in outer lining of L.D. converters
C. Have poorer hydration resistance than pitch bonded bricks
D. All A., B. and C.
A. Decreased viscosity of slag
B. Increased thermal conductivity of brick
C. Oxidising condition in the furnace
D. None of these
A. Pottery furnace
B. Glass melting furnace
C. Crucibles
D. Gas retorts
A. 50-100
B. 100-150
C. 200-400
D. 500-1000
A. Basic Bessemer converter
B. Basic open hearth furnace
C. Electric furnaces
D. All A., B. and C.
A. Fireclay
B. Silica
C. Chrome magnesite
D. None of these
A. Attack by basic slag
B. Abrasion
C. Disintegration on sudden change of temperature
D. Both B. and C.