🔍 Key Concepts

• Fuel oil system layout: relationship between storage tanks, settling tanks, and service (day) tanks • How water contamination affects boiler burners and combustion • Differences between changing suction source vs. changing pumps or pump speed

💭 Think About

• Which option actually removes or bypasses the water in the fuel reaching the burners, instead of just moving it around? • Think about where water usually collects in a settling tank and how engineers normally isolate a contaminated tank. • Which action would give the boiler the cleanest fuel in the shortest time without shutting it down?

✅ Before You Answer

• Identify which component (settling tank vs. service tank vs. pump suction) is likely contaminated with water. • Check which action changes the source of fuel rather than only changing how it is pumped. • Verify which option is a standard immediate response in marine boiler practice when one settling tank shows signs of water.