🔍 Key Concepts

• 46 CFR Subchapter F – Marine Engineering requirements for fuel oil service systems • Purpose of a fuel oil pump relief valve and where it is normally piped back to • How discharge pressure could affect suction piping in a closed loop fuel system

💭 Think About

• Look at which option protects the system from overpressure or backpressure conditions in the fuel piping. • Ask yourself: in a typical fuel oil system, where does excess pressure or flow safely return to? • Consider which options specify a very unusual or overly specific requirement that is unlikely to be written that way in 46 CFR.

✅ Before You Answer

• Verify which component the relief valve on a fuel oil service pump is supposed to protect and where its outlet normally leads. • Check if 46 CFR actually specifies a particular pipe schedule and material for discharge piping in this context. • Confirm whether regulations prefer simplex or duplex strainers on vital systems like fuel oil service.