To resist spalling tendency, a refractory should have________________?
Correct answer: C. All A., B. and C.
- A. Greater diffusivity
- B. Low specific heat
- C. All A., B. and C.
- D. Low thermal co-efficient of expansion
Explanation
Spalling is reduced when temperature gradients and thermal stresses are small, which is promoted by high thermal diffusivity, low specific heat, and a low thermal expansion coefficient. Therefore all three properties improve resistance to spalling.
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