FAA Powerplant Written Practice Test

What is the primary purpose of the oil breather pressurization system in turbine engines?

1. To reduce engine noise

2. To provide a proper oil spray pattern from the main bearing oil jets

3. To maintain engine temperature

4. To control oil pressure automatically

The correct answer is: To provide a proper oil spray pattern from the main bearing oil jets

The primary purpose of the oil breather pressurization system in turbine engines is to provide a proper oil spray pattern from the main bearing oil jets. In turbine engines, the oil system is crucial for lubrication, cooling, and cleaning the engine components. The breather pressurization system ensures that the engine oil is delivered at the correct pressure and flow rate, which is essential for creating the ideal oil spray pattern. This pattern allows for effective lubrication of the bearings, which helps in reducing wear and tear, enhancing engine efficiency, and extending engine life. Having a proper oil spray pattern is vital because it ensures that all necessary components receive adequate lubrication. If the spray pattern is not optimized, it can lead to insufficient lubrication, increased friction, and ultimately engine failure. The breather system plays a key role in maintaining not just the delivery of oil but also the conditions under which oil and air can interact within the engine compartment, thereby facilitating an effective cooling and lubrication system.