Refractory Materials & Abrasives MCQs

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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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