FAA AMT Airframe Practice Exam 2026 – All-in-One Study Guide to Master Aviation Maintenance Technician Certification!

A digital fuel totalizer is used to measure the amount of fuel used, fuel remaining, and the current rate of consumption during a flight. While weight aboard at takeoff is a factor in determining fuel usage, the totalizer does not directly measure weight. The color, viscosity, and octane rating of the fuel do not impact the measurement of fuel usage and are not factors that are displayed on a digital fuel totalizer. Therefore, the correct answer is A and the other options are incorrect in the context of measuring fuel usage during a flight.