AMP - Aviation Maintenance Technician Powerplant Practice Exam

The purpose of a crossfeed valve in fuel systems is specifically to allow fuel transfer between tanks. This function is critical in aircraft with multiple fuel tanks, as it enables the redistribution of fuel to maintain balance, optimize fuel consumption, and ensure that engines receive the necessary fuel supply under various flying conditions. When the valve is opened, fuel can flow from one tank to another, which is vital during flight operations to manage fuel levels and assist in maintaining an aircraft's center of gravity.

Managing fuel pressure, measuring fuel temperature, and filtering out contaminants are important functions in fuel system design; however, those tasks are addressed by different components. For instance, fuel pumps and regulators manage pressure, temperature sensors measure fuel temperature, and dedicated filters are responsible for contaminant removal. Each subsystem plays a role in overall fuel system functionality, but the crossfeed valve's unique role is facilitating fuel transfer between tanks.