What is the purpose of performing the aqua-glo test during recirculation?

Performing the aqua-glo test during recirculation serves the specific purpose of assessing contaminant levels within the fuel. This test is designed to detect the presence of water and other contaminants that may compromise fuel quality. During the recirculation process, the fuel is circulated through the system, allowing the aqua-glo test to sample the fuel effectively to identify any unwanted substances. Monitoring contaminant levels is crucial because excessive water or particulates in fuel can lead to engine performance issues, corrosion, and other operational problems.

In contrast, checking fuel viscosity involves analyzing the flow characteristics of the fuel, which isn't the primary focus of the aqua-glo test. Evaluating filter performance relates to determining how well the filters are functioning in removing particles and contaminants, not specifically measuring the contaminant levels through a direct test like the aqua-glo. Lastly, measuring fuel temperature is a separate assessment entirely and is not associated with the aqua-glo testing process. Thus, understanding the function of the aqua-glo test clarifies its role in ensuring fuel purity and system reliability.