1.

After how many heats, should the refractory lining be renewed?(a) 50-100(b) 100-200(c) 200-300(d) 300-400

Answer» Right option is (c) 200-300

Easy explanation: The refractory lining must be renewed, as the constant heating processes may cause it to damage. After approximately, 200 to 300 heats, the refractory lining should be renewed for a smooth operation.


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