Q
Resistance to slag attack of a refractory _____________________?
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A
A. Depends on the nature of slag & refractory
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B
B. Decreases at higher temperature
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C
C. Decreases, if defective joints & cracks exist in the refractory
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D
D. All a., b. and c.
Correct Answer:
D. D. All a., b. and c.