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Q: For ceramic material classified as refractory, identify the type of refractory having chief constituents as silica, quartz, sand, ganister, and silica brick.
  • A. Basic refractories
  • B. Neutral refractories
  • C. Carbonaceous refractories
  • D. Acid refractories
Correct Answer: Option D - Acid refractories– It combine readily with bases. Their chief constituent is silica, quartz, sand, ganister and silica bricks. Basic refractories– It is consist mainly of basic oxides, magnesite, dolomite. Neutral refractory bricks – It is consists of materials which do not combine with either basic or acidic oxides. Ex- Silicon carbide, chromite and carbon.
D. Acid refractories– It combine readily with bases. Their chief constituent is silica, quartz, sand, ganister and silica bricks. Basic refractories– It is consist mainly of basic oxides, magnesite, dolomite. Neutral refractory bricks – It is consists of materials which do not combine with either basic or acidic oxides. Ex- Silicon carbide, chromite and carbon.

Explanations:

Acid refractories– It combine readily with bases. Their chief constituent is silica, quartz, sand, ganister and silica bricks. Basic refractories– It is consist mainly of basic oxides, magnesite, dolomite. Neutral refractory bricks – It is consists of materials which do not combine with either basic or acidic oxides. Ex- Silicon carbide, chromite and carbon.