With decrease in porosity, the ______________ of the refractories decreases?
Correct answer: C. Spalling resistance
- A. Strength
- B. Thermal conductivity
- C. Spalling resistance
- D. None of these
Explanation
Lower porosity usually improves strength and thermal conductivity but reduces the ability of a refractory to absorb sudden thermal strain. Therefore, spalling resistance decreases as porosity falls.
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