🔍 Key Concepts

• Auxiliary exhaust steam is usually low-pressure steam from auxiliary machinery exhausts, often reused for heating services to improve efficiency. • Different steam users on a ship require different steam pressures and qualities (e.g., high vs low pressure, clean vs slightly wet). • Think about which equipment typically uses low‑pressure heating steam rather than high‑pressure motive steam.

💭 Think About

• Consider which option most logically uses steam mainly as a heating medium rather than as a high‑energy driving or atomizing source. • Ask yourself: which of these systems could still work efficiently with lower-pressure exhaust steam instead of fresh high‑pressure steam? • Eliminate any choices that clearly require high-pressure, clean motive steam for proper operation.

✅ Before You Answer

• Verify which systems (from the choices) on a steam ship are normally supplied by low‑pressure exhaust steam in standard marine steam-plant diagrams. • Check marine engineering references: which loads are classified as steam-heated services (heaters/coils) instead of motive-steam consumers (jets, ejectors, atomizers). • Make sure the option you select is one where using waste/exhaust steam would improve overall plant efficiency by recovering heat that would otherwise be lost.