Porosity of fireclay refractories is _______________ percent?
Correct answer: B. 10-25
- A. 5-10
- B. 10-25
- C. 25-35
- D. 35-50
Explanation
Fireclay refractories are relatively porous, commonly having about 10 to 25% porosity. Their porosity permits some penetration by slag, while denser high-alumina products generally resist penetration better.
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