With increase in the alumina content, the refractoriness of high alumina refractories_______________?
Correct answer: A. Increases
- A. Increases
- B. Decreases
- C. Remain same
- D. May increase or decrease
Explanation
Alumina has a very high melting point, so increasing its proportion raises the temperature at which the refractory softens or melts. High-alumina bricks therefore have greater refractoriness than ordinary fireclay bricks.
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