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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Which of the following is true about COD and BOD?

  1. They are direct measurements of the organic content in the influent

  2. They are measurements of inorganic content in the effluent

  3. They are indirect measurements of the organic content in the influent

  4. They are not related to wastewater treatment processes

The correct answer is: They are indirect measurements of the organic content in the influent

COD and BOD are both parameters used to measure the organic content in wastewater, but they do so in different ways. COD directly measures the amount of oxygen required to oxidize organic matter, while BOD measures the amount of oxygen consumed by microorganisms in breaking down organic matter. Therefore, neither A nor B is the correct answer. Additionally, D is incorrect as both COD and BOD are closely related to wastewater treatment processes. Overall, C is the correct answer because although these measurements indirectly measure the organic content, they do so in different ways and are both integral to understanding and managing wastewater treatment processes.

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