Which outcome occurs when a PLC controlling a chemical reactor's temperature-regulating solenoid fails to de-energize after reaching setpoint?

💡 Explanation

A runaway exothermic reaction initiates because thermal runaway, unchecked by PLC shutoff, drives elevated temperatures feeding the reaction due to positive feedback rather than a cooled stabilized state. Therefore, temperature wildly and catastrophically rises rather than a stable output, catalyst degradation, or changed viscocity.

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