California Wastewater Treatment Operator Practice Exam

Disable ads (and more) with a membership for a one time $2.99 payment

Study for the California Wastewater Treatment Operator Exam. Use flashcards and multiple-choice questions with detailed explanations to boost your readiness. Prepare with confidence and aim for success!

Each practice test/flash card set has 50 randomly selected questions from a bank of over 500. You'll get a new set of questions each time!

Practice this question and more.

Which of the following is not associated with a trickling filter?

plastic media
rock media
filamentous bacteria
fixed film growth

The correct answer is: filamentous bacteria

Filamentous bacteria is not associated with a trickling filter because trickling filters operate on the principle of fixed film growth, where microorganisms attach to a solid surface (such as plastic or rock media) and treat wastewater as it flows over them. Filamentous bacteria do not form a fixed film and are not commonly found in trickling filters. This type of bacteria is typically associated with activated sludge treatment processes, where they can cause sludge bulking and other operational issues. Therefore, options A, B, and D are all associated with a trickling filter, making C the correct answer.