Silica bricks are attacked by basic slags at high temperature. Which of the following is not used solely as a binding material ?

Related Mcqs:

1. 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....

2. Porosity of silica bricks varies from ______________ percent?

   A. 5 to 10 B. 20 to 30 C. 45 to 60 D. 60 to 75...

3. Silica bricks have low spalling resistance below 600°C, due to its________________?

   A. Very high thermal conductivity B. High co-efficient of expansion upto this temperature C. High thermal diffusivity D. Low refractoriness...

4. Use of higher percentage of lime for bonding silica bricks, reduces their__________________?

   A. Strength B. Abrasion resistance C. Both A. & B. D. Neither A. nor B....

5. The maximum linear expansion of silica bricks during firing is about ______________ percent?

   A. 0.5 B. 1 C. 2 D. 3.5...

6. 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...

7. Which is the most stable crystalline form of silica at room temperature ?

   A. Quartz B. Cristobalite C. Tridymite D. None of these...

8. Refractoriness of a typical silica brick corresponds to Segar cone number, ’32’, which is equivalent to a temperature of _____________ °C?

   A. 1380 B. 1520 C. 1710 D. 1915...

9. Fusion temperature of pure silica (SiO2) is _______________ °C?

   A. 1350 B. 1715 C. 2570 D. 2800...

10. Roof of a basic open hearth furnace is lined with ______________ bricks?

    A. Silica B. Fireclay C. Dolomite D. Magnesite...