Tennessee Wastewater Operator Practice Exam

What is a mechanical problem caused by excessive speeds of the distributor in a trickling filter?

1. Wear on the pipe fittings

2. Power surge

3. Damage to the bearing races of the turntable

4. Overheating of the motor

The correct answer is: Damage to the bearing races of the turntable

In a trickling filter, the distributor is critical for evenly distributing wastewater over the media surface. If the distributor operates at excessive speeds, one of the consequences is the potential for damage to the bearing races of the turntable. This is because the increased speed can impose excessive stress and strain on the bearings, leading to wear and potential failure. Bearings are designed to support rotational movement and maintain stability; however, when operated outside their intended speed range, heat and friction increase, accelerating deterioration. Understanding the distribution of stresses and operational limits is essential for maintaining equipment in wastewater treatment facilities. Damage to the bearing races can lead to misalignment and operational inefficiencies, ultimately affecting the performance of the trickling filter system. Proper maintenance schedules and speed controls are vital to prevent such mechanical issues from arising.