Oilers/Plant Tenders (HHC) Civil Service Practice Exam

How do most grease cups operate?

1. By atmospheric pressure

2. By spring pressure

3. By manual operation

4. By electric control

The correct answer is: By spring pressure

Grease cups are designed to deliver a controlled amount of lubricant to machinery components, and they typically operate through the principle of spring pressure. In this mechanism, the spring inside the grease cup provides the necessary force to push the lubricant out when needed. This system allows for a steady and consistent flow of grease, ensuring that machinery remains appropriately lubricated without requiring constant manual intervention. Using spring pressure allows for a controlled release; as the machinery operates and the lubrication is consumed, the spring is compressed and gradually releases more grease. This method is efficient as it takes advantage of mechanical force, maintaining the lubrication without the need for complex automation or frequent manual adjustments. Other operating methods, such as atmospheric pressure or manual operation, do not provide the same level of control and consistency as spring pressure does. Electric control systems are also less common in grease cups since they introduce potential complications and maintenance needs that are typically avoided in simple lubrication systems.