Pre-Solo Aeronautical Knowledge Practice Test

Question: 1 / 400

What is the primary component of the C172S ignition system?

One electric starter

One magneto system

Two engine-driven magnetos and spark plugs

The primary component of the C172S ignition system is the configuration consisting of two engine-driven magnetos and spark plugs. This traditional ignition system is crucial for generating the necessary spark to ignite the fuel-air mixture in the engine's cylinders.

The use of two magnetos increases the reliability of the engine because if one magneto fails, the other can still provide adequate ignition, allowing the engine to continue running. Each magneto independently supplies electricity to its own set of spark plugs, ensuring redundancy and enhancing safety. Furthermore, the combined delivery of sparks from both sets of spark plugs helps ensure optimal combustion efficiency and smooth engine operation.

Overall, the design of the ignition system in the C172S, with its dual-magneto setup, emphasizes reliability and safety in flight operations, which is a critical consideration for light aircraft.

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