Welcome back to TPO magazine's new and improved Exam Study Guide Series, which offers a pair of water/wastewater study questions each week with in-depth explanations of the answers. We covered a set of wastewater and drinking water treatment questions last week on the topics of Plant Operating Condition and Transmission Line Flow Rate. This week, you can test your knowledge about nitrification in aeration tanks, and consumer complaints about water. Take a look at the multiple-choice sample questions and answer explanations below.Sample Question No. 1:During nitrification in an aeration tank, which of the following parameters will decrease?A) AlkalinityB) Oxidation reduction potential (ORP)C) NitrateD)
