What should be visually tested at the nozzle after fuel recirculation?

Visually testing the color of the fuel at the nozzle after fuel recirculation is essential to ensure the quality and integrity of the fuel. Color can provide immediate visual cues about the presence of contaminants or degradation of the fuel. For instance, the appearance of any discoloration, cloudiness, or particulates can indicate contamination, which may compromise fuel quality and performance.

By assessing the color, operators can quickly identify issues that may not be detectable through other means, prompting further investigation or remediation actions to maintain safe and effective fuel handling practices. This step is crucial in averting risks associated with compromised fuel, such as equipment malfunction or safety hazards.

Other factors like temperature, density, and pH level, while relevant in specific contexts, are typically measured using specialized equipment and are not typically assessed through visual inspection at the nozzle.