OperatorMaster
Practice QuestionsPractice ExamMath CenterCoursesPremiumAbout
Start Practicing
OperatorMaster

Free study tools for water and wastewater operators.

AccountSettingsAboutPricing and PaymentExam Prep BooksGet the iPhone AppSupportPrivacyTermsExam Disclaimer

Appearance

Operator Master is independent and is not affiliated with WPI, PSI, ABC, the Washington State Department of Ecology or any other state or provincial certification agency.
‹ Back to Advanced MathSolids Inventory
Exit

Try independently

Solve It Your Way

An aeration basin holds 1.2 MG at 2,800 mg/L MLSS. How many pounds of MLSS are in the basin?

Choose one answer

Optional help

Use Only What You Need

Hints stay hidden unless you ask for them.

Operator Master
0
Family source boundary

Curated values support math practice only. They are not facility targets, design assumptions, or operating recommendations.