AWWA DISTRIBUTION SYSTEM MAINTENANCE
TECHNCINA CERTIFICATION EXAM QUESTIONS
AND CORRECT ANSWERS (VERIFIED ANSWERS Q&A
2026 |INSTANT DOWNLOAD PDF
1. What is the primary purpose of a water distribution
system?
A. Treat wastewater
B. Store stormwater
C. Deliver potable water to consumers
D. Generate electricity
Rationale: A distribution system is designed to transport
treated drinking water from treatment facilities to end users.
Correct Answer: C. Deliver potable water to consumers
2. Which material is commonly used for modern water mains?
A. Wood
B. Ductile iron
C. Paper
D. Fabric
Rationale: Ductile iron is strong, durable, and widely used in
water distribution systems.
Correct Answer: B. Ductile iron
,3. What is the function of a valve in a distribution system?
A. Increase water temperature
B. Control water flow
C. Remove bacteria
D. Add chemicals
Rationale: Valves regulate, isolate, or stop water flow in
pipelines.
Correct Answer: B. Control water flow
4. What does “residual chlorine” indicate?
A. No chlorine is present
B. Chlorine has completely evaporated
C. Remaining disinfectant in water
D. Water is contaminated
Rationale: Residual chlorine ensures ongoing disinfection in the
system.
Correct Answer: C. Remaining disinfectant in water
5. What is a water main break most likely to cause?
A. Increased water clarity
B. Water loss and pressure drop
C. Improved flow
D. Lower energy use
,Rationale: Pipe breaks cause leaks and reduce system pressure.
Correct Answer: B. Water loss and pressure drop
6. What is the purpose of flushing water mains?
A. Add chemicals
B. Remove sediment and improve water quality
C. Increase pressure
D. Freeze pipes
Rationale: Flushing removes accumulated sediment and
maintains water quality.
Correct Answer: B. Remove sediment and improve water
quality
7. Which device prevents backflow?
A. Pump
B. Check valve
C. Hydrant
D. Meter box
Rationale: Check valves prevent reverse flow of water.
Correct Answer: B. Check valve
8. What is “water pressure” measured in?
, A. Liters
B. Pounds per square inch (PSI)
C. Kilograms
D. Meters per second
Rationale: PSI is the standard unit for measuring pressure in
distribution systems.
Correct Answer: B. Pounds per square inch (PSI)
9. What is the main function of a fire hydrant?
A. Drain water mains
B. Provide emergency firefighting water supply
C. Measure chlorine
D. Increase pressure
Rationale: Hydrants supply water for firefighting purposes.
Correct Answer: B. Provide emergency firefighting water supply
10. What causes “water hammer”?
A. Slow pipe flow
B. Sudden valve closure
C. High water quality
D. Low temperature
Rationale: Rapid changes in flow velocity create pressure
surges known as water hammer.
Correct Answer: B. Sudden valve closure
TECHNCINA CERTIFICATION EXAM QUESTIONS
AND CORRECT ANSWERS (VERIFIED ANSWERS Q&A
2026 |INSTANT DOWNLOAD PDF
1. What is the primary purpose of a water distribution
system?
A. Treat wastewater
B. Store stormwater
C. Deliver potable water to consumers
D. Generate electricity
Rationale: A distribution system is designed to transport
treated drinking water from treatment facilities to end users.
Correct Answer: C. Deliver potable water to consumers
2. Which material is commonly used for modern water mains?
A. Wood
B. Ductile iron
C. Paper
D. Fabric
Rationale: Ductile iron is strong, durable, and widely used in
water distribution systems.
Correct Answer: B. Ductile iron
,3. What is the function of a valve in a distribution system?
A. Increase water temperature
B. Control water flow
C. Remove bacteria
D. Add chemicals
Rationale: Valves regulate, isolate, or stop water flow in
pipelines.
Correct Answer: B. Control water flow
4. What does “residual chlorine” indicate?
A. No chlorine is present
B. Chlorine has completely evaporated
C. Remaining disinfectant in water
D. Water is contaminated
Rationale: Residual chlorine ensures ongoing disinfection in the
system.
Correct Answer: C. Remaining disinfectant in water
5. What is a water main break most likely to cause?
A. Increased water clarity
B. Water loss and pressure drop
C. Improved flow
D. Lower energy use
,Rationale: Pipe breaks cause leaks and reduce system pressure.
Correct Answer: B. Water loss and pressure drop
6. What is the purpose of flushing water mains?
A. Add chemicals
B. Remove sediment and improve water quality
C. Increase pressure
D. Freeze pipes
Rationale: Flushing removes accumulated sediment and
maintains water quality.
Correct Answer: B. Remove sediment and improve water
quality
7. Which device prevents backflow?
A. Pump
B. Check valve
C. Hydrant
D. Meter box
Rationale: Check valves prevent reverse flow of water.
Correct Answer: B. Check valve
8. What is “water pressure” measured in?
, A. Liters
B. Pounds per square inch (PSI)
C. Kilograms
D. Meters per second
Rationale: PSI is the standard unit for measuring pressure in
distribution systems.
Correct Answer: B. Pounds per square inch (PSI)
9. What is the main function of a fire hydrant?
A. Drain water mains
B. Provide emergency firefighting water supply
C. Measure chlorine
D. Increase pressure
Rationale: Hydrants supply water for firefighting purposes.
Correct Answer: B. Provide emergency firefighting water supply
10. What causes “water hammer”?
A. Slow pipe flow
B. Sudden valve closure
C. High water quality
D. Low temperature
Rationale: Rapid changes in flow velocity create pressure
surges known as water hammer.
Correct Answer: B. Sudden valve closure
