Tennessee Wastewater Operator Practice Exam

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Study for the Tennessee Wastewater Operator Exam. Prepare with flashcards and multiple choice questions, each with hints and explanations. Get exam-ready!

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What is a common preventative maintenance task for mixer aerators?

Adjusting the air flow rate
Changing the oil after the recommended amount of run time
Cleaning the tank thoroughly
Replacing the sparger every year

The correct answer is: Changing the oil after the recommended amount of run time

Changing the oil after the recommended amount of run time is a common preventative maintenance task for mixer aerators. This task is essential because mixer aerators often operate continuously, and the moving parts create wear and tear over time. Proper lubrication is necessary to reduce friction, prevent overheating, and extend the life of the equipment. By following the manufacturer's recommendations for oil changes, operators ensure that the aerator performs efficiently and effectively, thereby maintaining optimal aeration in the treatment process. Preventative maintenance is critical in wastewater treatment facilities, as it helps prevent unexpected breakdowns and costly repairs that can disrupt operations. Regularly changing the oil is a straightforward and vital step in ensuring the reliability of mixer aerators.