How are most compressors lubricated?

Answer: B — From the engine lubrication system

Most compressors are lubricated from the engine lubrication system. This method is effective because the compressor is often integrated with or driven by the engine itself. By using the same lubrication system, the compressor benefits from a consistent supply of oil, ensuring that it operates smoothly and reduces friction and wear on internal components. This shared lubrication aspect is crucial, especially in systems where maintaining adequate lubrication is necessary for optimal performance and longevity. The other methods of lubrication, such as external oil pumps, self-lubrication, or manual lubrication systems, are less common for compressors in automotive and heavy machinery applications. External oil pumps might require additional components and complexity in the system, while self-lubrication alone may not provide sufficient lubrication under high-stress conditions. Manual systems can be impractical for continuous operation and maintenance, which is why the integration with the engine’s lubrication system is generally favored for consistent performance.