🔍 Key Concepts

• ALCAP fuel oil purification system operation and purpose of the opening solenoid valve • What happens if fuel oil or water is unintentionally bypassing the normal separation path • Relationship between purifier leaks and sludge production, electrical load, and engine speed

💭 Think About

• Think about what the opening solenoid valve controls in an ALCAP system and what happens if it does not fully close. • Which part of the system would see an abnormal increase in flow or contamination if the valve is leaking by? • Ask yourself: would a small internal leak in a purifier valve directly change engine speed, or more likely change something in the separator’s discharge/output behavior?

✅ Before You Answer

• Verify which of the options is directly tied to purifier flow and discharge rather than engine control or electrical control. • Check which symptom would show up over time in routine engine room rounds (tank levels, electrical readings, RPM logs). • Eliminate choices that would require a direct connection to engine governor or electrical supply, and focus on the one that logically follows from extra oil/water going where it normally shouldn’t.