🔍 Key Concepts

• Basic energy conversion in a boiler (chemical → thermal → mechanical) • Primary purpose of each component: furnace, superheater, steam drum, economizer • Where fuel actually burns in the system

💭 Think About

• Which component is directly involved with burning fuel and producing heat, rather than just transferring or storing it? • For each option, ask: does this part mainly burn fuel, store steam/water, increase steam temperature, or preheat feedwater? • In a typical boiler diagram, where does combustion physically take place?

✅ Before You Answer

• Be clear on the definition of chemical energy (in fuel) vs thermal energy (heat). • Match each listed component to its main function in the steam cycle. • Confirm which option is the combustion space where fuel and air mix and burn.