California Wastewater Treatment Operator Practice Exam

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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!

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What is the correct formula for solids in raw wastewater?

Non settleable solids + settleable solids = total suspended solids
Non settleable solids = settleable solids - total suspended solids
Non settleable solids x settleable solids = total suspended solids
Total suspended solids / settleable solids = non settleable solids

The correct answer is: Non settleable solids + settleable solids = total suspended solids

Total suspended solids (TSS) is the sum of non-settleable solids and settleable solids. Non-settleable solids are solids that remain suspended in water and do not settle out over time, while settleable solids are solids that settle out in a given period of time. Therefore, the formula for TSS must include both types of solids, making option A the correct answer. Option B is incorrect because it shows the result of subtracting two different types of solids, which is not an accurate representation of TSS. Option C is incorrect because multiplying two different types of solids is not a valid way to calculate TSS. Option D is incorrect because dividing TSS by settleable solids does not provide a complete picture of all solid particles in the wastewater.