ERAU Commercial Checkride Practice Test

In a Cessna 172, the total usable fuel capacity is indeed 53 gallons. This figure represents the amount of fuel that can be utilized for flight after accounting for fuel that may be left in the tank due to usability limitations, such as fuel unavailability during certain maneuvers or levels of fuel in the tanks. It’s essential for pilots to understand the usable fuel capacity as it directly affects flight planning and performance, including weight and balance calculations and determining the aircraft's range. The Cessna 172 typically has two fuel tanks, each holding 28 gallons, giving a total capacity of 56 gallons; however, the end number that pilots work with for flight planning is 53 gallons, which ensures a safety margin. This understanding is crucial for pilots to maximize safety and efficiency during operations.