FAA Powerplant Written Practice Test

What components make up the magnetic system of a magneto?

1. Rotating magnet, pole shoes, and ignition coils

2. Rotating magnet, pole shoes, pole shoe extensions, and the coil core

3. Magnet, stator, and rotor

4. Breakers, coils, and rectifiers

The correct answer is: Rotating magnet, pole shoes, pole shoe extensions, and the coil core

The magnetic system of a magneto is comprised of various key components that work together to generate the high voltage needed to ignite the fuel-air mixture in an engine. The correct answer highlights the presence of a rotating magnet, pole shoes, pole shoe extensions, and the coil core. The rotating magnet creates a magnetic field as it spins within the magneto. This is essential for inducing electrical current in the ignition coils, as the changing magnetic field interacts with the coils. The pole shoes are critical as they help channel and concentrate the magnetic field, ensuring that the maximum amount of magnetic flux passes through the coil core. The pole shoe extensions play a vital role in reinforcing the magnetic circuit, increasing the efficiency of magnetic flux and enhancing the overall performance of the magneto. The coil core is the component where the coils are wound, and it serves to focus the magnetic field, thus improving inductance and the generation of voltage. These components together create the magnetic system that is essential for the magneto's operation, ensuring that it produces a strong enough spark for ignition. Other options mentioned include various components that are either not part of the magnetic system of a magneto or are components of different systems altogether, which do not adequately describe the specific components required for the magneto