Wastewater Class B Operator Solutions 2024

Bio-monitoring involves the use of aquatic life to test the toxicity of a wastewater treatment plant effluent. - Correct Answer TRUE The definition of an oxygen-deficient atmosphere is one that contains less than, what percentage of oxygen? - Correct Answer 19.5 1.) What is the function of a grit auger? - Correct Answer To Separate Organic from Inorganics 2.) Running a 30 min settling test is the best indication of what? - Correct Answer What is taking place in the Clarifier. 3.) How many inches do you pour a sludge drying bed? - Correct Answer 8 to 12 4.) Why do you draw sludge into the drying bed at a slow rate? - Correct Answer To promote drying of the sludge. 5.) In the F/M ratio what does the food stand for? - Correct Answer Organics 6.) What can chlorine be used for in a trickiling filter? - Correct Answer Reduce Ponding 7.) One part of liquid chlorine equals how much of Gas? - Correct Answer 450 8.) What is the purpose of a pretreatment program? - Correct Answer To cut cost and help with plant efficiency 9.) In a composite sample there was a Cl2 sample ran and there was no residual present, what does that say about the sample? - Correct Answer Inaccurate, Cl2 test is within 15 min, not 24 hours later 10.) In order to be a good communicator, what else do you need to be? - Correct Answer Listener 11.) During Nitrification, which organisms use ______ for food? - Correct Answer Nitrates In an Activated Sludge Treatment Process what is the most predominant organism? - Correct Answer Ciliates and rotifers with few flagellates. The Detention Time in a Contact Stabilization plant is _____ than other extended aeration plants. - Correct Answer Longer