Refractory castables are used for__________________?

Related Mcqs:

1. Sillimanite (Al2O3.SiO2) refractory, which is a neutral refractory, is not used in________________?

   A. Pottery furnace B. Glass melting furnace C. Crucibles D. Gas retorts...

2. Mixing of ground refractory material and water is done in a ______________ mill?

   A. Pug B. Ball C. Tube D. Rod...

3. High thermal conductivity of a refractory material is not important, when it is to be used in the______________________?

   A. Coke oven regenerators B. Muffle furnace C. Blast furnace D. Recuperators...

4. Test piece for determination of RUL of a refractory is heated in a/an____________________?

   A. Oxidising atmosphere B. Reducing atmosphere C. Electric furnace D. Neutral atmosphere...

5. Carbon refractory blocks ___________________?

   A. Are wetted by molten iron B. Are used in the hearth of blast furnace C. Are acidic in nature D. All A., B. and C....

6. Spalling resistance of a refractory cannot be increased by ____________________?

   A. Increasing its porosity B. Using a coarser grog during its manufacture C. Decreasing its thermal co-efficient of expansion D. Making it denser...

7. Periclase refractory contains mainly________________?

   A. CaO B. MgO C. Al2O3 D. SiO2...

8. Pyrometric cone equivalent (PCE) of a refractory is the measure of its_________________?

   A. Spalling resistance B. Fusion point C. Resistance to slag penetration D. Resistance to carbon monoxide attack...

9. Addition of zircon to silica refractory brick improves its_____________________?

   A. Crushing strength B. Resistance to slag attack C. Both A. and B. D. Neither A. nor B....

10. Fusion point of a basic refractory material is__________________?

    A. Reduced by the addition of acid oxides B. Increased by the addition of acid oxides C. Not affected by the addition of acid oxides D. Always less than 1000°C...