Which of the following is an example of an item that can trip an interlock and shut down a furnace?
A. High stack temperature
B. Low levels of O2 in the stack
C. Low levels of NOx in the stack
D. Low levels of CO in the stack
A. Correct. High stack temperature is an example of an item that can trip an interlock and shut down a furnace.
B. Incorrect. Excessive levels of O2 in the stack is an example of an item that can trip an interlock and shut down a furnace.
C. Incorrect. Excessive levels of NOx in the stack is an example of an item that can trip an interlock and shut down a furnace.
D. Incorrect. Excessive levels of CO in the stack is an example of an item that can trip an interlock and shut down a furnace.
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