What indicates a class 3 leak?

A class 3 leak is defined by the presence of fluid that visibly drips during an inspection. This classification indicates that the leak is significant enough to result in a measurable loss of fluid and could potentially lead to safety issues or equipment malfunction if not addressed promptly. Class 3 leaks are concerning because they can lead to greater damage if they are not repaired, thus necessitating immediate attention.

In this context, other options do not meet the criteria for a class 3 leak. A fluid that does not form drops or is merely present without visible dripping suggests lesser severity, while evaporating fluid does not constitute a leak at all since it disappears before it can show evidence of escape. Therefore, the presence of dripping fluid clearly delineates a class 3 leak and highlights the importance of timely maintenance actions.