south-dakota-wastewater-treatment-class-1 Practice Test

1Multiple ChoiceSelect all that apply

During routine operation of a sedimentation basin, which two observations most directly indicate that the clarifier may be approaching solids overload? (Choose two.)

A.Sludge blankets rise toward the effluent weirs
B.The dissolved oxygen concentration in the aeration basin increases
C.Effluent turbidity and suspended solids increase
D.The influent sewer becomes deeper without entering the plant
E.The bar screen's rake remains stationary during a low-flow period

Reveal the answer to continue