FAA AMT Airframe Test 2026 – 400 Free Practice Questions to Pass the Exam

Cold fuel is denser than hot fuel, which means that cold fuel is heavier per gallon compared to hot fuel. As fuel temperature decreases, its density increases, resulting in a higher weight per gallon. This phenomenon is important to consider when calculating fuel quantities for aircraft weight and balance purposes. Therefore, the correct answer is A.

Option B is incorrect because hot fuel is actually lighter per gallon due to its decreased density at higher temperatures. Option C is incorrect because temperature does affect fuel weight, as explained above. Option D is also incorrect because cold fuel is indeed heavier per gallon, not lighter.