How can the chance of contaminating hydraulic fluid be decreased when working on hydraulic systems?

Correct Answer: Option C — Clean the fittings before they are disconnected.

Contamination is the primary cause of hydraulic component failure. Cleaning fittings and surrounding areas before disconnection prevents debris from entering the system. This practice is essential for maintaining fluid cleanliness standards required by 46 CFR Subchapter F, ensuring the longevity of precision valves, pumps, and actuators in marine service.