🔍 Key Concepts

• Trace the flow of water/steam between the right-hand steam drum and the left-hand heat exchanger marked by component 1. • Think about what happens to boiler water when it passes through tubes exposed to engine exhaust gas. • Review the differences between economizer/evaporator, superheater, and condenser functions in a waste‑heat boiler system.

💭 Think About

• Look at where the fluid entering component 1 comes from and where it goes afterward—does it return to the steam drum, go to the turbine, or go back to the feed system? • Ask yourself: is the steam leaving component 1 likely to be saturated or superheated, based on what equipment appears downstream before it reaches the turbine? • Which option describes what typically occurs inside exhaust‑gas‑heated tube banks in a waste‑heat boiler connected to a steam drum?.

✅ Before You Answer

• Confirm whether any separate superheater section is shown between the steam drum and turbine; if not, what kind of steam is most likely produced at this stage? • Verify that component 1 is directly in the engine exhaust gas path, indicating its role as a heat‑absorbing surface rather than level control equipment. • Eliminate any choice that would require heat removal (condensing) instead of heat addition (evaporation) in the presence of hot exhaust gas.