Which safety precaution should be followed when servicing high-pressure fuel systems on a naval vessel?

Study for the Machinery Repairman Test. Enhance skills with comprehensive questions, detailed hints, and insightful explanations. Dominate your exam!

Controlling energy and preventing exposure is the core idea here. High‑pressure fuel systems hold a lot of stored energy and flammable vapors, so the first step is to eliminate those hazards before you touch anything. Lockout/tagout stops any accidental re-energizing or re-pressurizing of the system. Depressurizing and relieving pressure ensures there’s no residual force that could spray fuel. Isolating lines prevents unintended flow or cross-connection during work. Wearing the right PPE protects you from splash, burns, and fumes, while proper ventilation helps disperse vapors so they don’t reach ignition sources. Following the established procedures ensures every step is performed in the correct order and under the right conditions. Together, these actions address the root hazards of high‑pressure, flammable systems.

Wearing only safety glasses leaves you unprotected against splashes and vapors. Working while the system remains pressurized risks a sudden fuel release. Merely cooling with water spray tackles heat but does not address depressurization, isolation, or energy control, and it can spread fuel or create additional hazards.