🔍 Key Concepts

• Function of a superheater in a marine boiler and what it does to the steam coming from the steam drum • Gas flow path: from furnace, across generating tubes, then over superheater, then to the convection bank/economizer • Physical appearance of superheater elements compared with generating tubes or the burner/FD fan

💭 Think About

• Trace the path of the hot gases from the burner at the bottom and look for where those gases first contact the steam-carrying elements after leaving the main generating bank. • Compare the shapes: which labeled area shows small, closely spaced tubes arranged in loops for steam, rather than the larger furnace enclosure or burner hardware? • Ask yourself which labels obviously mark the burner air fan or furnace floor, and eliminate those that clearly are not heat‑exchange surfaces for steam.

✅ Before You Answer

• Confirm which label marks the burner/forced-draft fan and eliminate it as a superheater candidate. • Identify which labeled areas are part of the furnace or grate/combustion zone, not steam tubes, and eliminate those. • Verify that the remaining choice is located in the gas pass above or just beyond the main generating tubes, where superheater elements are normally installed.