USCG Exam PracticeLube oil and fuel oil systems
According to NAVEDTRA 14075 §3-2, what is the consequence of air becoming trapped in a diesel fuel injection system after a filter change?
- A. Injection timing advances, causing the engine to knock
- B. The water separator floods, contaminating the injectors
- ✓ Vapor in the injection line prevents the pump from delivering solid fuelCorrect
- D. The duplex filter bypass opens, sending unfiltered fuel to the injectors
Why C is correct
NAVEDTRA 14075 §3-2 states that air trapped in the fuel system after filter changes or running a tank dry must be bled off because vapor in the injection line prevents the pump from delivering solid fuel. The other options describe separate failure modes not caused by air entrapment.
Cited:NAVEDTRA 14075 §3-2