FAA AMT Airframe Practice Exam 2026 – Complete Exam Prep Guide

The other options are incorrect because they do not directly address the problem of excessive voltage in the generator system. Reducing the load may help prevent further increases in voltage, but it does not address the root cause of the issue. Closing the main power switch may temporarily cut off power to the system, but it does not actively control or regulate the voltage. Increasing the resistance may help to limit the flow of electricity, but it may not be enough to prevent excessively high voltage. Opening the shunt field circuit is the most effective option as it reduces the strength of the magnetic field, which in turn lowers the voltage output of the generator. This helps to protect the generator system from potential damage caused by excessive voltage.