Wastewater B Test Exam Questions And Answers

Wastewater B Test Exam Questions And Answers Percent of volatile solids normally in sludge - ANS 70-80% D.O. levels in a primary clarifier - ANS 0.5-1.0 MG/L Why are precautionary measures needed around an aeration basin? - ANS undertow and turbulence O.S.H.A. approved trench - ANS narrow excavation in which the depth is greater than the width; the width must be less than 15 feet What causes bulking? - ANS 1. Excessive hydraulic loading, 2. Solids not promptly removed from clarifier 3. Inadequate weir length 4. Improper ratio of depth to surface area of the final clarifier What are the 5 elements of a trickling filter? - ANS 1. Floor 2. under drain 3. Wall containing the filter bed 4. media 5. filter distribution arm When and where are monthly reports submitted? - ANS by the 20th of the following month; submitted to Austin How and when do you report a bypass? - ANS as soon as possible by phone within 24 hours; followed by in writing within 5 working days What are the 5 events of stream purification? - ANS 1. Pollution 2. Degradation 3. Decomposition 4. Recovery 5. Clear What are the 2 methods for measuring D.O.? - ANS 1. Winkler method 2. meter What is needed for good communication? - ANS good listening How much chlorine gas comes from one part liquid chlorine? - ANS 450