A. Silica
B. Carborundum
C. Fireclay
D. Magnesite
Related Mcqs:
- Outer combustion chamber of blast furnace stove is lined with _______________ bricks?
A. Fireclay
B. Silica
C. Chrome magnesite
D. Zirconia - Roof of a basic electric furnace is made of ______________ bricks?
A. Superduty fireclay
B. Silica
C. Chromite
D. None of these - Which property of refractories is the most important for top section of the blast furnace ?
A. Resistance to abrasion
B. Resistance to slag penetration
C. Stability of volume at high temperatureD. Resistance to corrosion by slag
- A metal oxide is reduced by heating it in a stream of hydrogen. After complete reduction, it is found that 3.15 gm of the oxide has yielded 1.05 gm of the metal. It may be inferred that the ____________________?
A. Atomic weight of the metal is 4
B. Equivalent weight of the metal is 4
C. Atomic weight of the metal is 2
D. Equivalent weight of the metal is 8 - Pure oxide refractories are generally monocrystalline in nature and are self bonded ______________ bricks are generally used as moderator in nuclear reactors?
A. Beryllia
B. Carborundum
C. Corundum
D. Thoria - Spalling of silica bricks occurs due to abrupt volume changes, when it is cooled below a temperature of ______________ °C?
A. 770
B. 570
C. 270
D. 70 - Fireclay bricks are not used in the_________________?
A. Blast furnace
B. Hot blast stove
C. Cupola
D. Wall of coke oven - Lower wall courses of soaking pits are made of _____________ bricks to avoid the action of molten slag & scale?
A. Chrome or magnesite
B. Silicon carbide
C. Silica
D. Low duty fireclay - Fireclay bricks are not used in the________________?
A. Beehive coke oven
B. By-product coke oven walls
C. Combustion chamber of B.F. stoves
D. Coke oven regenerators - High porosity refractory bricks have________________?
A. Poor resistance to the penetration of molten slag, metal & flue gases
B. Poor heat conductivity & low strength
C. Better thermal spalling resistance
D. All A., B. and C.
