USCG Exam PracticeLube oil and fuel oil systems
Under 46 CFR §56.50-60(d)(3), a power-operated shutoff valve on a fuel oil tank is equipped with a fluid power actuator that is not opened against spring pressure. Which of the following requirements applies specifically to the energy storage system for that actuator?
- A. The energy storage system must be cross-connected to the fire main to ensure availability during emergencies
- ✓ The energy storage system must be used for no other purpose and must have sufficient capacity to cycle all connected valves from the initial position to the opposite position and returnCorrect
- C. The energy storage system must be capable of holding all valves in the closed position indefinitely without recharging
- D. The energy storage system must be located inside the machinery space for immediate access by the engineer on watch
Why B is correct
46 CFR §56.50-60(d)(3)(i) requires that fluid power actuated valves not opened against spring pressure must be provided with an energy storage system that is used for no other purpose and has sufficient capacity to cycle all connected valves from the initial valve position to the opposite position and return. The regulation also requires the system to be protected from fire and mechanical damage as far as practicable — not located inside the machinery space for convenience.
Cited:46 CFR §56.50-60