Discussion
The pyrometric cone equivalent of a refractory indicates its
Answer: D
Correct answer: softening temperature
The pyrometric cone equivalent compares a cone made of the refractory with a series of standard cones fired alongside it, and reports the number of the standard cone that deforms to the same extent. It measures the temperature at which softening begins under its own weight, and it says nothing about behaviour under load, thermal shock or slag attack.
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