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Refractory Materials & Abrasives MCQs – Chapter 13 DAE

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1. Refractories are used in





2. Refractories keep their------------ at high temperatures.





3. In Silica Bricks binding material is





4. The percentage of SiO2 in Fire Clay Bricks is





5. Corundum Refractories contain





6. High Alumina Bricks are mostly used in





7. Carborundum Refractories contain





8. Fusion temperature of super refractory in centigrade is more than





9. Zirconia bricks are-------------- Refractories.





10. Magnisite bricks are-------------- Refractories.





11. Dolomite bricks are-------------- Refractories.





12. The most popular scale of abrasive hardness is





13. Abrasives are important since all-------------- require it.





14. Which one is both a natural and man-made synthetic abrasive.





15. Which one is natural abrasive.





16. Which one is artificial (Synthetic) abrasive.





17. In emery the percentage of corundum is about





18. The hardness of Silicon Carbide in MOHS’ scale is





19. Which one is present in abrasive crocus.





20. Which abrasive is chemically carbon





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