What could be a likely cause for two large bubble compressors in a wastewater treatment plant switching over constantly?

The correct choice in this scenario focuses on the condition of the air filters. When air filters become dirty, they restrict airflow to the compressors. This restriction can lead to poor performance and fluctuations in pressure, causing the compressors to switch over frequently as they attempt to maintain the necessary airflow and pressure levels required for optimal operation.

In a wastewater treatment plant, maintaining a consistent air supply is crucial for processes such as aeration, which relies on stable and adequate pressurization. If the air filters are clogged with debris, dirt, or other material, the compressors may struggle to operate effectively, leading to constant switching between the two compressors as they respond to the changing pressure conditions.

Other factors like power supply issues, faulty pressure gauges, or incorrect settings can contribute to compressor difficulties, but in this case, the immediate impact of dirty air filters directly affects airflow, making it a likely cause for the compressors' instability.