Career Enlisted Aviator Fundamentals Practice Test 2026 – Complete Exam Prep

Unlock all questions

This demo includes only 20 questions. Upgrade to access hundreds of questions, flashcards, exam simulations, and disable ads.

Full question bankExam simulationsFlashcards

From $12.50Unlock all

Session length

1 / 20

What is a fuel crossfeed and why is it used?

A crossfeed increases fuel temperature for efficiency.

A crossfeed stores extra fuel in the wing tips.

A crossfeed vents fuel vapors overboard.

A crossfeed allows fuel from multiple tanks to balance fuel quantity and ensure engine feed if one tank is low.

Fuel crossfeed is a system that links multiple fuel tanks so fuel can be drawn from any tank and delivered to the engines. This lets you balance the amount of fuel across tanks, maintain proper center of gravity, and keep an engine fed if one tank runs low or a pump or line becomes inoperative. In practice, opening the crossfeed allows fuel to be transferred from tanks that still have fuel to those that are needed, ensuring continuous engine operation even with uneven fuel usage or a failed tank. This is why it’s used: to balance remaining fuel and guarantee a reliable feed to all engines.

The other descriptions don’t fit crossfeed. It doesn’t aim to raise fuel temperature for efficiency, store extra fuel in wing tips, or vent vapors overboard; those are different functions outside the crossfeed purpose.