Oilers/Plant Tenders (HHC) Civil Service Practice Exam

A mechanical force feed lubricator on a steam engine adjusts oil delivery based on what factor?

1. The type of oil used

2. Engine temperature changes

3. Engine speed changes

4. Load on the engine

The correct answer is: Engine speed changes

The correct answer relates to how a mechanical force feed lubricator operates in a steam engine environment. These lubricators are designed to deliver oil to the engine components in a way that corresponds to the engine's speed changes. As the engine speed increases, the lubricator adjusts the flow of oil to ensure that moving parts receive an adequate amount of lubrication, protecting them from excessive wear and ensuring efficient operation. In contrast, while factors such as engine temperature and load on the engine do influence lubrication needs, a mechanical force feed lubricator specifically relies on the variations in engine speed to modulate oil delivery effectively. The type of oil used can affect viscosity and flow but does not determine the delivery adjustments made by the lubricator itself. Therefore, the focus of the lubricator's operation is primarily on engine speed changes, which is vital for maintaining optimal lubrication conditions in a dynamic engine environment.