🔍 Key Concepts

• How fuel oil heating coils are arranged inside tanks on steam ships • Difference between boiler feed water and the liquids inside fuel/settling/service tanks • Why steam that has touched oil or fuel is handled differently from clean steam used for feedwater or distillation

💭 Think About

• Which choice talks about preventing oil or fuel from getting into the boiler feed system? • Is a "contaminated steam" system normally used to MAKE clean water, or to KEEP dirty steam separate from clean systems? • Look at each option and ask: does this describe steam that is already suspect/dirty, or steam that must be kept clean for feed or potable water?

✅ Before You Answer

• Identify which answers involve potable (drinking) water versus boiler feed water • Focus on the option that clearly deals with return steam from fuel tank heating coils and its effect on feedwater purity • Eliminate any choice that treats contaminated steam as if it were the source for making high‑purity feedwater or drinking water