Refractoriness under load (RUL) is the most important property for the refractory bricks_________________?
Correct answer: B. At the hearth bottom of the furnace on which stock is placed
- A. Used for furnace insulation
- B. At the hearth bottom of the furnace on which stock is placed
- C. Used in the roof of the furnace
- D. None of these
Explanation
RUL measures how well a refractory supports a mechanical load at high temperature without deforming. This is especially important for hearth bricks carrying the weight of the furnace stock.
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