FAA Powerplant Written Practice Test

Which type of cleaners can be used for turbine engine parts?

1. Water-based cleaners

2. Emulsion type cleaners

3. Solvent-free cleaners

4. Acid-based cleaners

The correct answer is: Emulsion type cleaners

Emulsion type cleaners are designed specifically to remove heavy contamination from turbine engine parts. These cleaners combine oil-based and water-based solutions, allowing them to effectively break down and remove oils, greases, and other contaminants that can accumulate on engine components. The emulsion helps ensure that the cleaner adheres to surfaces while also providing the ability to emulsify and lift away dirt and grime. When choosing a cleaner for turbine engine parts, it's critical to select a product that is effective and safe for the materials involved, preventing any damage to sensitive components. Emulsion type cleaners are formulated to avoid harming metals and other materials commonly found in turbine engines, making them suitable for this application. Other types of cleaners mentioned might pose risks or lack the necessary effectiveness. For instance, water-based cleaners may not adequately remove heavier oils and contaminants, while solvent-free cleaners might not effectively break down the greasy substances typical of turbine engine deposits. Acid-based cleaners can be too aggressive and may damage certain materials used in engine construction, making them inappropriate for use on turbine engine parts.