A. 8
B. 24
C. 44
D. 58
Maximum apparent porosity of magnesite bricks is about _____________ percent? Read More »
Refractory Technology A. Bottom of soaking pits
B. Between acid & basic linings in basic open hearth furnaces to prevent their chemical action
with each other
C. Both A. & B.
D. Neither A. and B.
Chromite refractories are used in_______________? Read More »
Refractory Technology A. Are wetted by molten iron
B. Are used in the hearth of blast furnace
C. Are acidic in nature
D. All A., B. and C.
Carbon refractory blocks ___________________? Read More »
Refractory Technology A. Furnaces allowed to cool frequently
B. Flues
C. Chimney linings
D. All A., B. and C.
Fireclay bricks are used in the___________________? Read More »
Refractory Technology A. Spalling resistance
B. Thermal conductivity
C. Fusion point
D. Slag penetration resistance
High density refractory bricks have lower__________________? Read More »
Refractory Technology A. Washing action of metal
B. Corrosion by layer of slag
C. Both A. & B.
D. Neither A. nor B.
A. Corundum
B. Carborundum
C. Bauxite
D. Periclase
A. Slide gate in teeming laddies
B. Continuous casting systems
C. Both A. and B.
D. Neither A. nor B.
Alumina-graphite bricks are used for lining the ____________________? Read More »
Refractory Technology A. 5 to 10
B. 20 to 30
C. 45 to 60
D. 60 to 75
Porosity of silica bricks varies from ______________ percent? Read More »
Refractory Technology A. Coke oven walls
B. Beehive coke ovens
C. Dome and upper portion of B.F. stoves
D. Open hearth furnace roof
Silica refractories are not used in _________________? Read More »
Refractory Technology