FAA Powerplant Written Practice Test

What components make up the reciprocating engine cooling system?

1. Oil cooler and intercooler

2. Engine cowling, cylinder baffles, and cylinder fins

3. Turbine blades and rotors

4. Fuel lines and filters

The correct answer is: Engine cowling, cylinder baffles, and cylinder fins

The components that make up the reciprocating engine cooling system primarily include the engine cowling, cylinder baffles, and cylinder fins. Engine cowling is designed to manage airflow around the engine, helping to guide the cooling air where it is needed most. It creates a streamlined path for airflow, promoting efficient cooling by preventing air from escaping without cooling the engine components adequately. Cylinder baffles play a crucial role in directing airflow specifically around the engine's cylinders. They help to ensure that the airflow is optimal for cooling by preventing hot air from recirculating and ensuring that cooler air enters directly over the cylinder heads. Cylinder fins are also essential for dissipating heat. They increase the surface area of the cylinders, allowing more efficient heat transfer to the surrounding air. The fins enhance the cooling process as air flows over them during operation, effectively removing heat from the engine. Together, these components work synergistically to regulate engine temperature, preventing overheating and ensuring reliable performance in a reciprocating engine. The other options do not pertain directly to the cooling needs of a reciprocating engine.