Hot metal runner in blast furnace are lined with ______________ bricks?

Related Mcqs:

1. Outer combustion chamber of blast furnace stove is lined with _______________ bricks?

   A. Fireclay B. Silica C. Chrome magnesite D. Zirconia...

2. Roof of a basic electric furnace is made of ______________ bricks?

   A. Superduty fireclay B. Silica C. Chromite D. None of these...

3. 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 temperature D. Resistance to corrosion by slag...

4. 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...

5. 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...

6. 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...

7. Fireclay bricks are not used in the_________________?

   A. Blast furnace B. Hot blast stove C. Cupola D. Wall of coke oven...

8. 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...

9. 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...

10. 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....