Which of the following options is NOT a component of a lubrication system?

A lubrication system is composed of several key components that work together to ensure machinery operates smoothly and efficiently. The lubricant reservoir serves as the storage area for the lubricating oil or grease, providing a supply that can be delivered to components needing lubrication. The pump is critical for moving the lubricant from the reservoir to the machinery parts that require it, ensuring adequate flow and pressure. The filter plays an essential role in removing contaminants from the lubricant, helping to maintain its effectiveness and extend the life of both the lubricant and the machinery.

While heating elements can be involved in certain lubrication systems, particularly to maintain the viscosity of oils in cold temperatures or as part of specialized applications, they are not a standard or necessary component for all lubrication systems. Standard lubrication systems primarily rely on a reservoir, pump, and filter to deliver and maintain the lubricant. Therefore, the correct understanding of a typical lubrication system excludes the heating element as a fundamental component, making it the accurate answer to identify as not being part of such a system.