Pure bauxite is the best raw material for the manufacture of high alumina refractories, in which maximum alumina content can be as high as _____________ percent?

Related Mcqs:

1. Maximum alumina content in high alumina refractory can be as high as _____________ percent?

   A. 30 B. 50 C. 70 D. 90...

2. With increase in the alumina content, the refractoriness of high alumina refractories_______________?

   A. Increases B. Decreases C. Remain same D. May increase or decrease...

3. With increasing alumina content, the fusion point of high alumina refractories__________________?

   A. Increases B. Decreases C. Remain constant D. May increase or decrease; depends on its alumina content...

4. The main raw material for manufacture of silicon carbide refractories is_________________?

   A. Corundum B. Carborundum C. Bauxite D. Periclase...

5. Faster rate of drying of moulded refractories results in high _____________ of refractories?

   A. Green strength B. Voids C. Shrinkage D. Both B. and C....

6. High alumina refractories are used in the ___________________?

   A. Dome of blast furnace stoves B. Electric arc furnace roof C. Glass melting furnaces D. All A., B. and C....

7. 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...

8. Which of the following is not a high alumina refractory material ?

   A. Kyanite B. Sillimanite C. Diaspore D. Periclase...

9. With increase in the alumina content in firebricks, its fusion point (refractoriness) ?

   A. Decreases linearly B. Remains unchanged C. Increases D. Decreases...

10. 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...