California Wastewater Treatment Operator Practice Exam

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Prepare for the California Wastewater Treatment Operator Exam. Gain knowledge through multiple-choice questions and flashcards. Understand key concepts and regulations essential for wastewater treatment operations in California.

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Why is it important to maintain a horizontal weir in a clarifier?

to prevent short circuiting
to increase settling time
to reduce aeration
to improve skimming

The correct answer is: to prevent short circuiting

It is important to maintain a horizontal weir in a clarifier to prevent short circuiting. Short circuiting can occur when the water or wastewater does not flow evenly across the settling area, resulting in some particles settling too quickly while others are not given enough time to settle. This can lead to ineffective clarifier performance and poor water quality.