______________ bricks are used in the burning zone of a cement rotary kiln ?

Related Mcqs:

1. Rotary kilns meant for calcination of limestone are lined with chrome magnesite in ______________ zone?

   A. Preheating B. Cooling C. Burning D. All the above...

2. Bauxite calcining rotary kilns are lined with ________________ bricks?

   A. Fireclay B. Carbon C. 85% alumina D. Corundum...

3. 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....

4. Maximum shrinkage in volume occurring during burning/firing of dried refractories may be as high as ______________ percent?

   A. 10 B. 15 C. 20 D. 30...

5. Cold crushing strength of fireclay bricks is about ______________ kgf/cm2?

   A. 50-100 B. 100-150 C. 200-400 D. 500-1000...

6. . Refractoriness under load (RUL) of fireclay bricks (under a load of 2 kg/cm2) is ______________ °C?

   A. 500 B. 1000 C. >1350 D. >2000...

7. Walls, roofs & combustion chambers of annealing furnaces are made of ______________ bricks?

   A. High duty fireclay B. Silica C. Mullite D. Carborundum...

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

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

9. Hot blast main (carrying air at 1000°C) in blast furnace are lined with ______________ bricks?

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

10. ______________ bricks should not be used in oxidising atmosphere?

    A. Tar dolomite B. Carbon C. Silica D. Fireclay...