A. Slide gate in teeming laddies
B. Continuous casting systems
C. Both A. and B.
D. Neither A. nor B.
Related Mcqs:
- Maximum alumina content in high alumina refractory can be as high as _____________ percent?
A. 30
B. 50
C. 70
D. 90 - With increase in the alumina content, the refractoriness of high alumina refractories_______________?
A. Increases
B. Decreases
C. Remain same
D. May increase or decrease - With increasing alumina content, the fusion point of high alumina refractories__________________?
A. Increases
B. Decreases
C. Remain constant
D. May increase or decrease; depends on its alumina content - Pure bauxite is the best raw material for the manufacture of high alumina refractories, in which maximum alumina content can be as high as _____________ percent?
A. 55
B. 70
C. 80
D. 90 - Carbon bricks are not used in the lining of the_________________?
A. Combustion chamber of blast furnace stoves
B. Electric furnaces
C. Highly chemical resistant equipments
D. Blast furnace hearth - Silica bricks are never used for lining the____________________?
A. Beehive coke ovens
B. By-product coke ovens
C. Dome of blast furnace stoves
D. Roof of open hearth furnace - Fireclay bricks is not used for lining the__________________?
A. Cupola
B. Gas producer
C. Bottom of hot metal mixer
D. Roof of open hearth furnace - High alumina refractory compared to fireclay bricks have____________________?
A. Less load bearing capacity
B. Less resistance to slag attack
C. Low refractoriness
D. High resistance to thermal shock and creep - Semi-silica bricks compared to silica bricks have_______________?
A. Less fusion point
B. Better spalling resistance
C. Both A. and B.
D. Neither A. not B. - Graphite or carbon refractories______________________?
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
