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 UV Disinfection; and Total Water Hardness. This time, you can test your knowledge about automatic composite sampling devices, and chemical solution math.
Wastewater Treatment Sample Question
When operating an automatic composite sampling device, you notice elevated TSS and/or BOD levels in the effluent sample. What could be causing this problem? Pick the best answer
A. Not enough samples in the 24-hour periodB. Refrigerator temperature set too low C. Dirty lab-ware/operator errorD. Sample tubing
Exam Study Guide: Automatic Composite Sampling Devices; and Chemical Solution Math
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.
Feb 20, 2020
| by Rick Lallish and Drew Hoelscher |












