______________ 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