Lower wall courses of soaking pits are made of _____________ bricks to avoid the action of molten slag & scale?

Related Mcqs:

1. Refractory bricks having lower porosity have _____________________?

   A. High insulating properties B. Low heat capacity C. Low thermal conductivity D. Greater strength...

2. Refractory bricks with lower permeability is produced by using _________________?

   A. Higher firing temperature B. Higher moulding pressure C. Finer grog size D. All A., B. and C....

3. Water content in ground refractory material to be shaped into bricks by hand moulding is about _____________ percent?

   A. 5 B. 20 C. 40 D. 55...

4. 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...

5. Fireclay bricks are not used in the_________________?

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

6. Permeability of bricks is a measure of the___________________?

   A. Refractoriness B. Melting point C. Rate at which a fluid will pass through the pores D. Expansion during heating...

7. 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....

8. Fireclay bricks are used in the______________?

   A. Coke ovens regenerator B. Outer lining of L.D. converter C. Hearth bottom of blast furnace D. Coke oven walls...

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

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

10. An insulating refractory brick should have high porosity and low thermal conductivity. Which of the following is not used for inducing porosity in the insulating refractory bricks during its manufacture ?

    A. Cork B. Saw dust C. Sand D. Chemically prepared foam...