🔍 Key Concepts

• 46 CFR requirements for fuel oil service systems on boilers • Fire prevention measures related to high‑pressure fuel leaks near burners and hot surfaces • The specific purpose and installation concerns of duplex fuel oil discharge strainers

💭 Think About

• Ask yourself which choice focuses most directly on reducing the danger from a high‑pressure leak at the strainer itself near a very hot area. • Consider which options describe general good practices versus wording that sounds like a specific, location‑related requirement you might see written in 46 CFR. • Think about whether duplex strainers are primarily about flow continuity, filtration location, enclosure, or vapor handling—and which one 46 CFR is likely to regulate explicitly.

✅ Before You Answer

• Identify which option directly addresses spray of oil onto hot boiler or burner parts, a known ignition hazard. • Check which answer choice sounds like a mandatory installation location requirement rather than a design feature or “good idea.” • Verify in 46 CFR whether the wording about the strainer mentions being located in relation to the burner/boiler, rather than enclosing it or venting vapors.