MCQ PracticePolluted water having low BOD are most economically treated inSubject: Chemical EngineeringTopic: Environmental Engineering In CeASedimentation tanksBOxidation pondsCSludge digesterDClarifierCorrect Answer: BPractice QuizBack to MCQsRelated MCQsCurrent flows in a circuit whenEighttenths coulomb passes a point in 4 s. The current in amperes isThe unit of electrical charge is the