Wisconsin Water Service Installer
Certification Exam | Questions And
Answers [Verified Answers] Plus Rationales
| Qs & Ans Latest 2026/27 | Instant Pdf
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1. What is the purpose of a water service line?
A. Carry wastewater away
B. Deliver potable water from the main to a building
C. Treat drinking water
D. Increase system pressure
Answer: B
Rationale: Service lines connect the water main to customer
plumbing.
2. What is a curb stop used for?
,A. Fire protection
B. Shutting off water to a service line
C. Measuring flow
D. Adding chlorine
Answer: B
Rationale: It allows isolation of a customer’s water supply.
3. Where is a curb stop typically located?
A. Inside the home
B. Near the property line in a box
C. Inside the water main
D. At the treatment plant
Answer: B
Rationale: It is usually installed in a curb box near the street.
4. What is a service saddle used for?
A. Supporting pipe only
B. Connecting service line to water main
C. Measuring pressure
D. Disinfection
,Answer: B
Rationale: Provides a tapping connection to the main.
5. What is tapping a water main?
A. Painting the pipe
B. Connecting a new service line to an existing main
C. Removing the pipe
D. Testing chlorine levels
Answer: B
Rationale: A controlled connection is made under pressure.
6. What tool is commonly used to cut into a pressurized water
main?
A. Hammer
B. Tapping machine
C. Wrench only
D. Sawzall only
Answer: B
Rationale: A tapping machine safely drills into live mains.
, 7. What is a corporation stop?
A. Main valve in plant
B. Valve connecting service line to water main
C. Fire hydrant valve
D. Pump control valve
Answer: B
Rationale: Controls flow from main into service line.
8. What material is commonly used for modern service lines?
A. Lead
B. Copper or polyethylene (PE)
C. Steel only
D. Concrete
Answer: B
Rationale: Lead is no longer used due to health concerns.
9. What is the main concern with lead service lines?
A. High pressure failure
B. Lead contamination in drinking water
Certification Exam | Questions And
Answers [Verified Answers] Plus Rationales
| Qs & Ans Latest 2026/27 | Instant Pdf
Download
1. What is the purpose of a water service line?
A. Carry wastewater away
B. Deliver potable water from the main to a building
C. Treat drinking water
D. Increase system pressure
Answer: B
Rationale: Service lines connect the water main to customer
plumbing.
2. What is a curb stop used for?
,A. Fire protection
B. Shutting off water to a service line
C. Measuring flow
D. Adding chlorine
Answer: B
Rationale: It allows isolation of a customer’s water supply.
3. Where is a curb stop typically located?
A. Inside the home
B. Near the property line in a box
C. Inside the water main
D. At the treatment plant
Answer: B
Rationale: It is usually installed in a curb box near the street.
4. What is a service saddle used for?
A. Supporting pipe only
B. Connecting service line to water main
C. Measuring pressure
D. Disinfection
,Answer: B
Rationale: Provides a tapping connection to the main.
5. What is tapping a water main?
A. Painting the pipe
B. Connecting a new service line to an existing main
C. Removing the pipe
D. Testing chlorine levels
Answer: B
Rationale: A controlled connection is made under pressure.
6. What tool is commonly used to cut into a pressurized water
main?
A. Hammer
B. Tapping machine
C. Wrench only
D. Sawzall only
Answer: B
Rationale: A tapping machine safely drills into live mains.
, 7. What is a corporation stop?
A. Main valve in plant
B. Valve connecting service line to water main
C. Fire hydrant valve
D. Pump control valve
Answer: B
Rationale: Controls flow from main into service line.
8. What material is commonly used for modern service lines?
A. Lead
B. Copper or polyethylene (PE)
C. Steel only
D. Concrete
Answer: B
Rationale: Lead is no longer used due to health concerns.
9. What is the main concern with lead service lines?
A. High pressure failure
B. Lead contamination in drinking water
