Stormwater Inspector Certification Exam
Questions And Correct Answers (Verified
Answers) Plus Rationales 2026 Q&A | Instant
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1. What is the primary purpose of a stormwater management
system?
a) To provide drinking water
b) To control runoff and prevent flooding
c) To supply irrigation water
d) To treat sewage
Stormwater management systems are designed to control runoff,
reduce flooding, and prevent pollution of waterways.
2. Which of the following is a common pollutant in stormwater
runoff?
a) Sand only
b) Sediment, nutrients, and oil
c) Chlorine exclusively
d) Sulfur dioxide
Stormwater often carries sediments, nutrients like nitrogen and
phosphorus, and hydrocarbons from urban areas.
3. What is the purpose of a sediment trap at a construction site?
a) To store water for irrigation
b) To capture and settle sediment before discharge
c) To filter drinking water
, d) To provide a habitat for fish
Sediment traps prevent soil erosion from leaving the site and
entering waterways.
4. How often should stormwater BMPs (Best Management Practices)
be inspected during construction?
a) Once a year
b) Weekly and after major storms
c) Only at project completion
d) Monthly
Regular inspections ensure BMPs function properly and prevent
pollution.
5. What does the term “TSS” stand for in stormwater management?
a) Total Sodium Saturation
b) Total Soil Sample
c) Total Suspended Solids
d) Total Stormwater Supply
TSS measures the concentration of suspended particles in water,
an important indicator of water quality.
6. Which practice helps reduce sediment leaving a construction site?
a) Removing vegetation
b) Installing silt fences
c) Using heavy machinery near streams
d) Allowing runoff to flow unchecked
Silt fences act as barriers to trap sediment and prevent it from
entering waterways.
7. What is the primary function of a stormwater inlet protection
device?
, a) To reduce pipe clogging
b) To prevent sediment from entering the storm drain
c) To store water for reuse
d) To measure flow rates
Inlet protection prevents construction debris and sediment from
contaminating the drainage system.
8. Why is post-construction stormwater inspection important?
a) To measure water temperature
b) To remove trash
c) To ensure permanent BMPs are functioning
d) To treat drinking water
Inspections confirm that long-term stormwater controls are
properly installed and maintained.
9. Which of the following is considered an “illicit discharge”?
a) Rainwater from rooftops
b) Discharge of wastewater into storm drains
c) Groundwater infiltration
d) Irrigation runoff
Illicit discharges introduce pollutants into stormwater systems
illegally or unintentionally.
10. What is the recommended method for stabilizing exposed
soil on a slope?
a) Leaving it bare
b) Using gravel only
c) Applying mulch or erosion control blankets
d) Spraying with water daily
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) To provide drinking water
b) To control runoff and prevent flooding
c) To supply irrigation water
d) To treat sewage
Stormwater management systems are designed to control runoff,
reduce flooding, and prevent pollution of waterways.
2. Which of the following is a common pollutant in stormwater
runoff?
a) Sand only
b) Sediment, nutrients, and oil
c) Chlorine exclusively
d) Sulfur dioxide
Stormwater often carries sediments, nutrients like nitrogen and
phosphorus, and hydrocarbons from urban areas.
3. What is the purpose of a sediment trap at a construction site?
a) To store water for irrigation
b) To capture and settle sediment before discharge
c) To filter drinking water
, d) To provide a habitat for fish
Sediment traps prevent soil erosion from leaving the site and
entering waterways.
4. How often should stormwater BMPs (Best Management Practices)
be inspected during construction?
a) Once a year
b) Weekly and after major storms
c) Only at project completion
d) Monthly
Regular inspections ensure BMPs function properly and prevent
pollution.
5. What does the term “TSS” stand for in stormwater management?
a) Total Sodium Saturation
b) Total Soil Sample
c) Total Suspended Solids
d) Total Stormwater Supply
TSS measures the concentration of suspended particles in water,
an important indicator of water quality.
6. Which practice helps reduce sediment leaving a construction site?
a) Removing vegetation
b) Installing silt fences
c) Using heavy machinery near streams
d) Allowing runoff to flow unchecked
Silt fences act as barriers to trap sediment and prevent it from
entering waterways.
7. What is the primary function of a stormwater inlet protection
device?
, a) To reduce pipe clogging
b) To prevent sediment from entering the storm drain
c) To store water for reuse
d) To measure flow rates
Inlet protection prevents construction debris and sediment from
contaminating the drainage system.
8. Why is post-construction stormwater inspection important?
a) To measure water temperature
b) To remove trash
c) To ensure permanent BMPs are functioning
d) To treat drinking water
Inspections confirm that long-term stormwater controls are
properly installed and maintained.
9. Which of the following is considered an “illicit discharge”?
a) Rainwater from rooftops
b) Discharge of wastewater into storm drains
c) Groundwater infiltration
d) Irrigation runoff
Illicit discharges introduce pollutants into stormwater systems
illegally or unintentionally.
10. What is the recommended method for stabilizing exposed
soil on a slope?
a) Leaving it bare
b) Using gravel only
c) Applying mulch or erosion control blankets
d) Spraying with water daily
