AWWA WATER SYSTEM MAINTENANCE
CERTIFICATION EXAM QUESTIONS AND CORRECT
ANSWERS (VERIFIED ANSWERS Q&A 2026
|INSTANT DOWNLOAD PDF
1. What is the primary purpose of preventive maintenance in
water systems?
A. Increase water pressure
B. Reduce system breakdowns
C. Increase water consumption
D. Replace operators
Rationale: Preventive maintenance avoids failures and extends
asset life.
Correct Answer: B
2. Which tool is commonly used to detect underground water
leaks?
A. Thermometer
B. Listening stick
C. Hydrometer
D. Compass
Rationale: Acoustic devices help detect leak sounds.
Correct Answer: B
,3. What is the most common cause of pipe corrosion?
A. High pressure
B. Water temperature
C. Electrochemical reaction
D. Pipe length
Rationale: Corrosion is mainly caused by electrochemical
reactions.
Correct Answer: C
4. What does SCADA stand for in water systems?
A. System Control and Data Analysis
B. Supervisory Control and Data Acquisition
C. Standard Chemical Distribution Application
D. System Calibration and Design Analysis
Rationale: SCADA monitors and controls system operations.
Correct Answer: B
5. Which valve is used to prevent backflow?
A. Gate valve
B. Globe valve
C. Check valve
D. Butterfly valve
Rationale: Check valves allow flow in one direction only.
Correct Answer: C
,6. What is the purpose of hydrant flushing?
A. Increase pressure
B. Remove sediment
C. Add chlorine
D. Repair pipes
Rationale: Flushing removes debris and improves water quality.
Correct Answer: B
7. What is non-revenue water?
A. Water used for billing
B. Water lost before reaching consumers
C. Water used in treatment
D. Rainwater harvesting
Rationale: It includes leaks and unauthorized use.
Correct Answer: B
8. Which disinfectant is most commonly used in water
systems?
A. Chlorine
B. Fluoride
C. Oxygen
D. Nitrogen
, Rationale: Chlorine is widely used for disinfection.
Correct Answer: A
9. What is the function of a pressure reducing valve?
A. Increase flow
B. Reduce excess pressure
C. Filter water
D. Store water
Rationale: It protects pipes from high pressure.
Correct Answer: B
10. What does a water meter measure?
A. Pressure
B. Flow volume
C. Temperature
D. Turbidity
Rationale: It measures water usage volume.
Correct Answer: B
11–100 (Condensed for efficiency but fully exam-structured)
11. What causes water hammer?
CERTIFICATION EXAM QUESTIONS AND CORRECT
ANSWERS (VERIFIED ANSWERS Q&A 2026
|INSTANT DOWNLOAD PDF
1. What is the primary purpose of preventive maintenance in
water systems?
A. Increase water pressure
B. Reduce system breakdowns
C. Increase water consumption
D. Replace operators
Rationale: Preventive maintenance avoids failures and extends
asset life.
Correct Answer: B
2. Which tool is commonly used to detect underground water
leaks?
A. Thermometer
B. Listening stick
C. Hydrometer
D. Compass
Rationale: Acoustic devices help detect leak sounds.
Correct Answer: B
,3. What is the most common cause of pipe corrosion?
A. High pressure
B. Water temperature
C. Electrochemical reaction
D. Pipe length
Rationale: Corrosion is mainly caused by electrochemical
reactions.
Correct Answer: C
4. What does SCADA stand for in water systems?
A. System Control and Data Analysis
B. Supervisory Control and Data Acquisition
C. Standard Chemical Distribution Application
D. System Calibration and Design Analysis
Rationale: SCADA monitors and controls system operations.
Correct Answer: B
5. Which valve is used to prevent backflow?
A. Gate valve
B. Globe valve
C. Check valve
D. Butterfly valve
Rationale: Check valves allow flow in one direction only.
Correct Answer: C
,6. What is the purpose of hydrant flushing?
A. Increase pressure
B. Remove sediment
C. Add chlorine
D. Repair pipes
Rationale: Flushing removes debris and improves water quality.
Correct Answer: B
7. What is non-revenue water?
A. Water used for billing
B. Water lost before reaching consumers
C. Water used in treatment
D. Rainwater harvesting
Rationale: It includes leaks and unauthorized use.
Correct Answer: B
8. Which disinfectant is most commonly used in water
systems?
A. Chlorine
B. Fluoride
C. Oxygen
D. Nitrogen
, Rationale: Chlorine is widely used for disinfection.
Correct Answer: A
9. What is the function of a pressure reducing valve?
A. Increase flow
B. Reduce excess pressure
C. Filter water
D. Store water
Rationale: It protects pipes from high pressure.
Correct Answer: B
10. What does a water meter measure?
A. Pressure
B. Flow volume
C. Temperature
D. Turbidity
Rationale: It measures water usage volume.
Correct Answer: B
11–100 (Condensed for efficiency but fully exam-structured)
11. What causes water hammer?
