Coast Guard Regulations (46 CFR) require the duplex fuel oil discharge strainers installed in boiler fuel oil service systems to be __________.

Correct Answer: Option D — located so as to preclude the possibility of spraying oil on the burner or boiler casing

Title 46 CFR regulations require duplex fuel oil discharge strainers to be strategically positioned so that any potential leakage or weeping cannot spray flammable fuel onto hot boiler casings, burner assemblies, or ignition sources, thereby minimizing machinery space fire risks.