Stormwater Inspector Certification Exam
Questions and Correct Answers (Verified Answers)
Plus Rationales 2026 Q&A | Instant Download Pdf
1. What is the primary purpose of a stormwater management system?
A. Generate hydroelectric power
B. Prevent flooding and pollution runoff
C. Increase groundwater salinity
D. Store drinking water
Answer: B
Stormwater systems are designed to control runoff, reduce flooding,
and prevent pollutants from entering natural waterways.
2. What does NPDES stand for?
A. National Pollution Discharge Elimination System
B. National Pollutant Discharge Elimination System
C. Networked Public Drainage Environmental System
D. New Pollution Detection and Environmental Safety
,Answer: B
The NPDES program regulates discharges of pollutants into U.S. waters.
3. Which is a common stormwater pollutant?
A. Oxygen
B. Sediment
C. Nitrogen gas
D. Distilled water
Answer: B
Sediment from erosion is a major contributor to stormwater pollution.
4. What is erosion control primarily intended to prevent?
A. Air pollution
B. Soil displacement
C. Noise pollution
D. Water evaporation
Answer: B
Erosion control measures prevent soil from being washed away by
runoff.
,5. What is a best management practice (BMP)?
A. A construction blueprint
B. A method to control stormwater pollution
C. A financial reporting tool
D. A soil testing procedure
Answer: B
BMPs are practices designed to reduce environmental impacts of
stormwater.
6. Which structure is used to trap sediment in stormwater runoff?
A. Manhole
B. Sediment basin
C. Fire hydrant
D. Pump station
Answer: B
Sediment basins slow water flow and allow particles to settle.
7. What is the main function of a silt fence?
A. Divert traffic
B. Filter sediment from runoff
, C. Increase water velocity
D. Measure rainfall
Answer: B
Silt fences trap sediment while allowing water to pass through.
8. Stormwater runoff is best defined as:
A. Groundwater stored underground
B. Rainwater flowing over land surfaces
C. Water in deep aquifers
D. Industrial wastewater only
Answer: B
Runoff occurs when rain flows over impervious or saturated surfaces.
9. Which surface produces the most stormwater runoff?
A. Forest
B. Grassland
C. Concrete pavement
D. Wetland
Answer: C
Impervious surfaces like concrete prevent infiltration, increasing runoff.
Questions and Correct Answers (Verified Answers)
Plus Rationales 2026 Q&A | Instant Download Pdf
1. What is the primary purpose of a stormwater management system?
A. Generate hydroelectric power
B. Prevent flooding and pollution runoff
C. Increase groundwater salinity
D. Store drinking water
Answer: B
Stormwater systems are designed to control runoff, reduce flooding,
and prevent pollutants from entering natural waterways.
2. What does NPDES stand for?
A. National Pollution Discharge Elimination System
B. National Pollutant Discharge Elimination System
C. Networked Public Drainage Environmental System
D. New Pollution Detection and Environmental Safety
,Answer: B
The NPDES program regulates discharges of pollutants into U.S. waters.
3. Which is a common stormwater pollutant?
A. Oxygen
B. Sediment
C. Nitrogen gas
D. Distilled water
Answer: B
Sediment from erosion is a major contributor to stormwater pollution.
4. What is erosion control primarily intended to prevent?
A. Air pollution
B. Soil displacement
C. Noise pollution
D. Water evaporation
Answer: B
Erosion control measures prevent soil from being washed away by
runoff.
,5. What is a best management practice (BMP)?
A. A construction blueprint
B. A method to control stormwater pollution
C. A financial reporting tool
D. A soil testing procedure
Answer: B
BMPs are practices designed to reduce environmental impacts of
stormwater.
6. Which structure is used to trap sediment in stormwater runoff?
A. Manhole
B. Sediment basin
C. Fire hydrant
D. Pump station
Answer: B
Sediment basins slow water flow and allow particles to settle.
7. What is the main function of a silt fence?
A. Divert traffic
B. Filter sediment from runoff
, C. Increase water velocity
D. Measure rainfall
Answer: B
Silt fences trap sediment while allowing water to pass through.
8. Stormwater runoff is best defined as:
A. Groundwater stored underground
B. Rainwater flowing over land surfaces
C. Water in deep aquifers
D. Industrial wastewater only
Answer: B
Runoff occurs when rain flows over impervious or saturated surfaces.
9. Which surface produces the most stormwater runoff?
A. Forest
B. Grassland
C. Concrete pavement
D. Wetland
Answer: C
Impervious surfaces like concrete prevent infiltration, increasing runoff.
