Walls, roofs & combustion chambers of annealing furnaces are made of ______________ bricks?
Correct answer: A. High duty fireclay
- A. High duty fireclay
- B. Silica
- C. Mullite
- D. Carborundum
Explanation
High-duty fireclay bricks are commonly used for the walls, roofs, and combustion chambers of annealing furnaces because they tolerate high temperatures at a reasonable cost. Silica and specialty refractories are reserved for more specific service conditions.
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