FAA Powerplant Written Practice Test

What common concern exists with all internally driven reciprocating supercharger systems?

1. Fuel contamination

2. Overheating of the fuel-air mixture

3. Decreased engine performance

4. Increased weight of the engine

The correct answer is: Overheating of the fuel-air mixture

Internally driven reciprocating supercharger systems are designed to compress the intake air, thereby increasing the engine's power output. One common concern associated with these systems is the overheating of the fuel-air mixture. As the air is compressed, it experiences an increase in temperature due to the physics of compression. If the temperature of the fuel-air mixture becomes too high, it can lead to several issues, including pre-ignition or detonation within the engine, which can cause significant damage. Monitoring the temperature of the fuel-air mixture is crucial to ensure that it remains within operational limits to maintain engine performance and longevity. This concern highlights the need for effective cooling systems and careful management of the supercharger's operation to avoid excessive heat generation.