Which type of integral tank transfers fuel to associated main tanks to extend aircraft range?

• A. Extended-range tanks
• B. Main tanks
• C. Auxiliary tanks
• D. Sump box

Answer: (A)

Extended-range tanks are designed to feed extra fuel into the aircraft’s main tanks. They carry additional fuel and are connected to the associated main tanks so a pump or transfer line moves fuel from the extended section into the main tanks as needed. This increases usable fuel without needing to carry only external, separate tanks, and it helps maximize range while keeping the aircraft’s center of gravity within limits. The other options don’t describe this transfer capability: main tanks are simply the primary storage, auxiliary tanks add capacity but aren’t defined by transferring to the main tanks, and a sump box collects fuel rather than transferring it to extend range.