🔍 Key Concepts

• Fuel oil atomization and how droplet size affects combustion • Role of primary vs. secondary air in a boiler furnace • What component actually shapes and directs the air pattern around the atomized fuel

💭 Think About

• Which adjustment changes how air meets the fuel spray pattern, not just how much air enters the furnace? • Among the options, which device is specifically designed to control the air pattern around the burner tip? • Think about what must be adjusted when changing burner load to keep a clean, stable flame with minimal smoke or flame impingement.

✅ Before You Answer

• Identify which choice directly controls air distribution at the burner rather than overall furnace air quantity • Ask: does this part mainly move the burner, change air cones, or throttle air flow? Match that to proper mixing function • Verify which component is used to balance primary vs. secondary air for best combustion and flame shape