🔍 Key Concepts

• Behavior of burners when fuel supply is restricted or interrupted • Typical causes of sputtering in steam boiler fires under otherwise steady operating conditions • Difference between problems caused by pumps, strainers, and settling tanks

💭 Think About

• What would cause a momentary or partial loss of fuel flow to the burners without changing any controls? • Which component in the fuel system is most likely to become gradually restricted during normal operation? • Among the options, which action directly addresses a likely restriction without suddenly changing pressure or suction source?

✅ Before You Answer

• Be clear on the fuel system flow path: settling tank → service pump → strainer → burners • Think about which item is a common point for gradual clogging during normal operation • Avoid options that would mask the symptom instead of removing the likely cause of restricted flow