During the described air pollution event, some monitors maxed out with ratings of what?

During the described air pollution event, some monitors maxed out with ratings of what?

• A. 999
• B. 800
• C. 500
• D. 1000

Answer: (A)

When measurement devices are overwhelmed by extremely high pollution levels, they can saturate and display their maximum possible reading. That top-end value tells you the instrument has reached its limit and cannot quantify how much higher the actual concentration is. This makes sense for the described event: some monitors showing the highest rating available indicates saturation, meaning the real pollution level was likely far beyond what the scale could report. The key idea is the data reflect a limit of the instrument, not an exact concentration.

When measurement devices are overwhelmed by extremely high pollution levels, they can saturate and display their maximum possible reading. That top-end value tells you the instrument has reached its limit and cannot quantify how much higher the actual concentration is.

This makes sense for the described event: some monitors showing the highest rating available indicates saturation, meaning the real pollution level was likely far beyond what the scale could report. The key idea is the data reflect a limit of the instrument, not an exact concentration.