🔍 Key Concepts

• Purpose of a day tank in a fuel system • How settling and water separation can occur in fuel storage • Which tank actually supplies fuel directly to engines

💭 Think About

• Think about what makes a day tank different from storage or settling tanks in a fuel system layout. • Which one of the listed functions is absolutely essential for the engine to keep running on a daily basis? • Consider whether a day tank is primarily for fuel conditioning (cleaning) or for ensuring a steady, immediate fuel supply.

✅ Before You Answer

• Identify the main function of a day tank in relation to the engines. • Decide whether settling out impurities and decanting water are primary or secondary/incidental effects of using a day tank. • Ask: if only one function could be guaranteed by the day tank, which one would be most critical for safe, continuous operation?