Arizona Driving Permit Written Practice Exam

What is the function of a continuous emissions monitoring system (CEMS)?

To monitor boiler water chemistry To measure the concentration of pollutants in the flue gas continuously To control fuel flow to the burner To monitor plant electrical output

Correct Answer:

To measure the concentration of pollutants in the flue gas continuously

Explanation:

CEMS provides continuous measurement of gases like NOx, SO2, CO, and O2 leaving the stack.

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