RUL of refractories depends on the _____________________?
Correct answer: D. All A., B. and C.
- A. Chemical composition
- B. Physical structure
- C. Presence of impurities like iron & alkali
- D. All A., B. and C.
Explanation
Refractoriness under load depends on composition, microstructure, and fluxing impurities such as iron and alkalis. These factors determine when the refractory begins to deform under temperature and pressure, so all three apply.
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