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Q: Brick earth should contain about_______ of silica.
- A. 5%-7%
- B. 50%-60%
- C. <10%
- D. 15%-20%
Correct Answer:
Option B - Ingredients of good brick earth–
Silica – 50-60%
Alumina – 20-30%
Lime – 10%
Magnesia – 1%
Ferric oxide – 7%
Alkalies – 10%
B. Ingredients of good brick earth–
Silica – 50-60%
Alumina – 20-30%
Lime – 10%
Magnesia – 1%
Ferric oxide – 7%
Alkalies – 10%
Explanations:
Ingredients of good brick earth– Silica – 50-60% Alumina – 20-30% Lime – 10% Magnesia – 1% Ferric oxide – 7% Alkalies – 10%Address
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