Junior Officer Surface Material Readiness Course Practice Test 2026 – All-in-One Exam Prep

LLOL means Major Lube Oil Leak. This alarm signals that lubrication is being lost through a leak at a significant rate, which is critical because lube oil keeps bearings cooled and protected from friction. A major leak can quickly lead to bearing damage, overheating, and potential fire hazards if oil contacts hot surfaces. When this alarm displays, focus on quickly locating the leak source, isolating the affected system if safe, and reducing or stopping the oil supply to prevent further loss, while monitoring oil pressure and temperature and notifying the watch team per procedure. Containment and spill prevention are also important steps. The other terms refer to different problems: a lock/unlock shaft relates to a mechanism status, unusual noise is a general symptom of mechanical issues, and a hot line shaft bearing indicates bearing overheating rather than an oil leak.