Wastewater Certification Practice Tests
Prepare for Your Wastewater Operator Certification Exam
Approved Environment, Inc. provides online wastewater certification practice tests for operators preparing for municipal, industrial, laboratory, activated sludge, stabilization pond and wastewater mathematics certification examinations.
Our online practice exams help you prepare for your wastewater operator certification exam by testing your knowledge of wastewater treatment processes, plant operations, safety, laboratory procedures, activated sludge, solids handling and wastewater mathematics.
Each wastewater certification practice exam contains 50 multiple-choice questions. After completing the exam, you will receive your score immediately and review the correct answers so you can identify the subjects you need to study before taking your state wastewater certification examination.
These practice tests are designed for wastewater treatment operators preparing for beginning, intermediate and advanced certification levels. Select the wastewater practice exam that most closely matches the certification level or treatment subject you are studying.
Wastewater Operator Certification Preparation
Wastewater operator certification requirements and examination levels vary by state. Approved Environment, Inc. provides exam-preparation resources to help operators review important wastewater treatment subjects and practice answering certification-style multiple-choice questions before taking their state examination.
Use the practice exams on this page to identify subjects that may need additional study. Operators should also review the specific certification requirements, examination information and reference materials provided by their state operator certification program.
Wastewater Certification Study Resources
Approved Environment offers several resources for operators preparing for wastewater certification:
- Wastewater Certification Practice Exams — Practice certification-style multiple-choice questions and review your results.
- Wastewater Certification Review Classes — Review important wastewater treatment concepts and prepare for certification examinations.
- Wastewater Certification Review Books — Study materials and review books for wastewater operators.
Along with the practice exam, you will also have access to "The Best Plan to Pass the Certification Exam." This guide provides a practical approach to preparing for a multiple-choice certification examination, including ways to read questions carefully, manage difficult questions and make the best use of your study time.
The cost for each practice test, including access to "The Best Plan to Pass the Certification Exam," is $10.00. Payment may be made by credit card or electronic check.
Online Wastewater Certification Exams Available
Choose from wastewater certification practice tests covering beginning and advanced municipal treatment, industrial wastewater treatment, activated sludge, stabilization ponds, laboratory procedures, physical treatment, solids and oils, and wastewater mathematics. These exams can help wastewater operators practice answering certification-style questions and become more comfortable with multiple-choice examinations.
Wastewater Certification Practice Tests Available
A-SO Exam $10 - Physical Treatment Solids and Oils
Class 1 & A Exam $10 - Beginners Municipal and Industrial
Class 2 Exam $10 - Intermediate Municipal
Class 3 & 4 Exam $10 - Advanced Municipal
Class B Industrial Exam $10 - Intermediate Industrial
Class C & D Industrial Exam $10 - Advanced Industrial
Laboratory Exam $10
Stabilization Ponds Exam $10
Activated Sludge Exam $10
Wastewater Mathematics Exam $10
Sample Wastewater Certification Practice Questions
1. What gas is heavier than air, is not detectable at high concentration, and is flammable? From class IA Exam
2. What is the normal detention time in the conventional activated sludge aeration tank? From class IA Exam
3. What are the top three injuries in wastewater in order? From class 2 Exam
4. How can a toxic waste be discovered in a treatment plant? From Class 2 Exam
5. Why does some of the suspended material in wastewater fail to be removed by settling in 1 hour? From class 2 Exam
6. What flow velocity is typically sufficient to prevent sulfide build-up in sewer lines? From Class 3 & 4 Exam
7. What is the odor threshold concentration for hydrogen sulfide? From class 3 & 4 Exam
8. Percent removal of BOD in a clarifier is 35%, if 70 mg/L are removed, what is the influent BOD? From Wastewater Mathematics Exam
9. What is the geometric mean of 1 and 100? From Wastewater Mathematics Exam
10. What is the population equivalent of an industry that contributes 4165 lb of BOD per day to a plant? From Wastewater Mathematics ExamReady to practice? Select the wastewater certification practice test that best matches the level or subject you are studying.
