Exam Practice Questions And Correct

Storm Sewer Installation Certification Exam Practice Questions And Correct Answers (Verified Answers) Plus Rationales 2026 Q&A | Instant Download Pdf

• What is the primary purpose of a storm sewer system?
• To transport potable water
• To dispose of sanitary wastewater
• To control and convey stormwater runoff
• To store industrial process water
• To control and convey stormwater runoff

Rationale: Storm sewer systems are engineered to manage stormwater,

preventing flooding and erosion.

• / 4

• Which type of pipe is MOST commonly used for municipal storm sewer

systems due to strength and durability?

• Clay pipe

B. PVC SDR-35

• Corrugated aluminum
• Concrete pipe (RCP)
• Concrete pipe (RCP)

Rationale: Reinforced concrete pipe is favored for large-diameter systems

for strength and long lifespan.

• The slope of a storm sewer line is designed primarily to maintain what?
• Chemical stability
• Structural load capacity
• Adequate flow velocity
• Maximum pressure
• Adequate flow velocity

Rationale: Proper slope ensures stormwater flows efficiently and helps

prevent sediment deposition.

• Which governing document typically dictates storm sewer installation

standards? 2 / 4

• Mechanical Code
• Local Public Works Specifications
• Electrical Code
• Occupational Safety Standards
• Local Public Works Specifications

Rationale: Municipal and regional agencies set detailed requirements for

storm sewer design and installation.

• What is the primary function of manholes in a storm sewer system?
• Provide water treatment
• Allow for access, inspection, and maintenance
• Increase stormwater pressure
• Store stormwater temporarily
• Allow for access, inspection, and maintenance

Rationale: Manholes allow inspection, cleaning, and repairs at key

locations in the system.

• Before excavation begins, which action is REQUIRED to identify all

underground utilities?

• Contact emergency services
• Review property deed
• Call the utility locating service 3 / 4

• Ask local residents
• Call the utility locating service

Rationale: Utility marking services prevent accidental line strikes and

ensure safety.

• Which bedding material is typically recommended for storm sewer pipe

installation?

• Topsoil
• Crushed stone or gravel
• Clay
• Peat
• Crushed stone or gravel

Rationale: Crushed aggregate provides stable support and drainage

around the pipe.

• What is the term for the soil material placed around a pipe to provide

support?

• Blinding
• Backfill
• Haunching
• Overlay
• Haunching
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