🔍 Key Concepts

• auxiliary boiler burner operation and how a stable flame should look and sound • effects of incorrect fuel/air mixture on combustion (smoke, pulsation, color) • how ignition system problems usually show up (failure to light, intermittent lighting) vs steady running problems

💭 Think About

• Think about what specifically causes a burner flame to become smoky and to pulsate once it is already lit and running continuously. • Ask yourself which of the choices describes a condition that would affect the entire combustion process all the time, not just the moment of ignition. • Consider which problems would most likely prevent the burner from lighting at all, instead of causing a smoky, surging flame after ignition.

✅ Before You Answer

• Identify which option is directly related to the combustion quality (how completely the fuel burns). • Decide which options relate only to starting/ignition versus ongoing operation after the flame is established. • Recall the typical signs of too much fuel or too little air (or vice versa): smoke, flame color, and flame stability.