Welcome back to TPO magazine's Exam Study Guide Series, which offers a pair of water/wastewater study questions with in-depth explanations of the answers. Last time, we covered a set of wastewater and drinking water treatment questions on the topics of Flow Velocity; and Confined Space Protocol. This time, you can test your knowledge about RBC troubleshooting, and noncarbonate hardness.
Wastewater Treatment Sample QuestionWhat is the condition found on a rotating biological contractor (RBC) that is identified by uneven shaft rotation, usually by uneven biofilm growth causing unbalanced weight distribution?
A. ChainingB. LopingC. FoulingD. Tepidity
Answer: The answer to this question is B. Although RBCs are not as commonly in use as they
Exam Study Guide: RBC Troubleshooting; and Noncarbonate Hardness
Maintaining your education is important, especially in a career that demands licensing exams. Prove you’re an expert operator by answering these questions and others from our Exam Study Guide Series.
Aug 22, 2019
| by Rick Lallish and Drew Hoelscher |














