_____________ nozzles are used in continuous casting of steel?
Correct answer: A. Zircon
- A. Zircon
- B. Thoria
- C. Carborundum
- D. Beryllia
Explanation
Zircon nozzles are used in continuous steel casting because zircon resists molten-steel attack, erosion and thermal shock. These properties give a longer service life than ordinary ceramic nozzle materials.
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