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Wastewater Treatment Operator Certification Test 2 final study guide 2024/2025
Wastewater Treatment Operator 
Certification Test 2 final study guide 
2024/2025 
What is the typical BOD removal efficiency in a primary clarifier? 
A) 10 to 15% 
B) 40 to 60% 
C) 20 to 50% 
D) 95 to 99% - CORRECT ANSWER-C) 20 to 50% (v.1 pg 129) 
What does the "F" in F/M ratio represent? 
A) The microorganism population in the aeration tank 
B) The amount of filamentous bacteria in the activated sludge process 
C) The MLVSS in the aeration tank 
D) The food for the microorganisms flowing i...
- Package deal
- Exam (elaborations)
- • 15 pages •
Wastewater Treatment Operator 
Certification Test 2 final study guide 
2024/2025 
What is the typical BOD removal efficiency in a primary clarifier? 
A) 10 to 15% 
B) 40 to 60% 
C) 20 to 50% 
D) 95 to 99% - CORRECT ANSWER-C) 20 to 50% (v.1 pg 129) 
What does the "F" in F/M ratio represent? 
A) The microorganism population in the aeration tank 
B) The amount of filamentous bacteria in the activated sludge process 
C) The MLVSS in the aeration tank 
D) The food for the microorganisms flowing i...
Water Treatment 2 Operator Certification Study Guide Final Exam
Water Treatment 2 Operator Certification 
Study Guide Final Exam 
A continuously flowing watercourse - CORRECT ANSWER-Perennial Stream 
Algae causes PH to ....... at night - CORRECT ANSWER-Decrease 
What contributes to creation of algae blooms - CORRECT ANSWER-Increased 
nutrients 
Iron is found mostly in what sources of water - CORRECT ANSWER-Groundwater 
Also called the rule of reasonable sharing - CORRECT ANSWER-Riparian Doctrine 
Water high in salinity and warm is - CORRECT ANSWER-Low in d...
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- Exam (elaborations)
- • 4 pages •
Water Treatment 2 Operator Certification 
Study Guide Final Exam 
A continuously flowing watercourse - CORRECT ANSWER-Perennial Stream 
Algae causes PH to ....... at night - CORRECT ANSWER-Decrease 
What contributes to creation of algae blooms - CORRECT ANSWER-Increased 
nutrients 
Iron is found mostly in what sources of water - CORRECT ANSWER-Groundwater 
Also called the rule of reasonable sharing - CORRECT ANSWER-Riparian Doctrine 
Water high in salinity and warm is - CORRECT ANSWER-Low in d...
Water Treatment Operator Level 1 Certification Final Exam
Water Treatment Operator Level 1 
Certification Final Exam 
What are the two important factors impacting the effectiveness of chlorination? - 
CORRECT ANSWER-Concentration of chlorine and contact time 
The treatment process that controls corrosion or scaling is known as what? - CORRECT 
ANSWER-Stabilization 
Permanganate reactions are highly dependent on what factor? - CORRECT ANSWERpH 
It is hardest to kill the organism that causes what illness? - CORRECT ANSWERCryptosporidiosis 
Disinfecti...
- Package deal
- Exam (elaborations)
- • 4 pages •
Water Treatment Operator Level 1 
Certification Final Exam 
What are the two important factors impacting the effectiveness of chlorination? - 
CORRECT ANSWER-Concentration of chlorine and contact time 
The treatment process that controls corrosion or scaling is known as what? - CORRECT 
ANSWER-Stabilization 
Permanganate reactions are highly dependent on what factor? - CORRECT ANSWERpH 
It is hardest to kill the organism that causes what illness? - CORRECT ANSWERCryptosporidiosis 
Disinfecti...
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