USCG Exam PracticeMaintenance, machine tools, drawings, and tables
Before performing any internal maintenance work on a diesel engine, which sequence of actions is required?
- A. Reduce engine to idle, isolate fuel, and post a watch
- ✓ Stop the engine, allow it to cool, isolate starting air and fuel, and engage the turning gearCorrect
- C. Stop the engine, isolate fuel only, and lock the throttle
- D. Engage the turning gear while the engine is still warm to prevent thermal distortion
Why B is correct
NAVEDTRA 14075 §3-1 specifies that before any internal work the engine is stopped, cooled, the starting air and fuel are isolated, and the turning gear is engaged so it cannot roll. All four steps are required; omitting any one leaves a hazard.
Cited:NAVEDTRA 14075 §3-1