FAA Powerplant Written Practice Test

What is the intended use of light corrosion preventative compounds?

1. To prevent all types of corrosion

2. To prepare engines for long-term storage

3. To preserve an engine for less than 30 days and to spray cylinders

4. To protect engines during flight

The correct answer is: To preserve an engine for less than 30 days and to spray cylinders

The intended use of light corrosion preventative compounds is primarily to preserve an engine for less than 30 days and facilitate the spraying of cylinders. These compounds are designed to protect metal surfaces from moisture and contaminants that can lead to corrosion, especially during periods when the engine may not be in frequent use. They are ideal for short-term storage applications, such as maintaining equipment in a serviceable state during brief downtimes, ensuring that rust and other forms of corrosion do not adversely affect engine components. While these compounds assist in providing a barrier against corrosion, they are not intended for long-term protection like heavier duty corrosion inhibitors. They also do not offer comprehensive protection during active flight, which involves different stressors and exposure. The focus on short-term preservation aligns with their formulation, ensuring engine components are adequately protected between regular operational cycles without the need for extensive maintenance measures.