🔍 Key Concepts

• Purpose of settling tanks in a fuel oil system • What happens to water and sediment when fuel is held warm and still • Difference between settling, heating for atomization, and blending with steam

💭 Think About

• Ask yourself: What is the main job of a settling tank compared with a service tank or the burner itself? • Which option describes something that requires time and gravity rather than pressure or burner operation? • Which process must happen before the fuel reaches the burners for combustion, to protect the system from damage and poor performance?

✅ Before You Answer

• Verify which choice involves removing contaminants (like water and sludge) from fuel before use • Check which options involve processes that normally occur at or near the burner, not in the settling tanks • Confirm that settling tanks are used with fuel kept warm and relatively still, which promotes a specific physical separation process