As the Water Treatment Operator certification exam approaches this Saturday (at least here in California), we are continuing our final reminders of some key water terms that always seem to show up on these tests. An important thing to recognize about this vocabulary is that every question is multiple choice, and every multiple choice question has three wrong answers. Sometimes, finding the correct answer is a process of elimination. By recognizing some of the wrong answers — through a full water vocabulary — you might be able to answer correctly some questions that you really aren’t that knowledgable about! Here’s today’s group of “Magic Water Words”:
Manganese greensand is a filter medium that is used only for iron and manganese treatment — as far as I have ever heard, at least. As there are usually very few questions on this subject, manganese greensand is a common wrong answer!
Methemoglobinimea — better known as blue baby syndrome — is the disorder that very young children can get if they ingest too much nitrate. Nitrate is regulated as a primary drinking water standard at 45 mg/L to guard against this public health risk.
Tapered flocculation is the practice of decreasing the mixing intensity of the flocculation process as we progress from stage to stage. This practice recognizes that as the floc particles grow larger, they also grow more fragile. Dropping the mixing intensity reduces the risk of floc destruction due to shear.
Well, there’s three more high probability water words for you. I hope you will make the MOST of them on Saturday!