Refractoriness/fusion points of 'Superduty' refractories is _______________ °C?
Correct answer: D. > 1730
- A. 1520-1630
- B. 1630-1670
- C. > 2000
- D. > 1730
Explanation
Superduty refractories withstand fusion temperatures above approximately 1730°C. The lower ranges correspond to lower-duty refractory classifications.
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