Missouri Erosion Control Inspector
Certification Exam Practice Questions
And Correct Answers (Verified Answers)
Plus Rationales 2026 Q&A | Instant
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1. What is the primary goal of erosion control on construction sites?
A) Increase water runoff speed
B) Prevent soil loss and sediment transport
C) Remove vegetation permanently
D) Increase soil compaction
Answer: B) Prevent soil loss and sediment transport
Rationale: Erosion control aims to minimize soil displacement and
prevent sediment from leaving the construction site.
2. Which document typically governs erosion and sediment control on a
construction site?
A) OSHA safety plan
B) SWPPP
, C) Building blueprint
D) Traffic control plan
Answer: B) SWPPP
Rationale: The Stormwater Pollution Prevention Plan (SWPPP)
outlines measures to control erosion and sedimentation.
3. What is the function of a silt fence?
A) Increase infiltration
B) Filter sediment from runoff
C) Redirect wind flow
D) Stabilize building foundations
Answer: B) Filter sediment from runoff
Rationale: Silt fences trap sediment while allowing water to pass
through.
4. Which soil type is most prone to erosion?
A) Clay
B) Gravel
C) Sand
D) Rock
Answer: C) Sand
Rationale: Sandy soils have large particles and low cohesion, making
them easily erodible.
5. Best practice to reduce erosion on steep slopes includes:
A) Removing vegetation
, B) Increasing runoff velocity
C) Installing slope stabilization measures
D) Compacting soil heavily
Answer: C) Installing slope stabilization measures
Rationale: Stabilization like mats or vegetation reduces soil
movement on slopes.
6. What is sediment?
A) Clean water
B) Soil particles transported by water or wind
C) Fertilizer
D) Bedrock fragments only
Answer: B) Soil particles transported by water or wind
Rationale: Sediment refers to eroded soil particles carried by runoff or
wind.
7. Which BMP helps reduce erosion immediately after soil disturbance?
A) Tree removal
B) Mulching
C) Asphalt paving
D) Excavation
Answer: B) Mulching
Rationale: Mulch protects exposed soil from rain impact and runoff.
8. What causes sheet erosion?
A) Concentrated water flow
, B) Uniform removal of soil by rainfall runoff
C) Wind only
D) Chemical reactions
Answer: B) Uniform removal of soil by rainfall runoff
Rationale: Sheet erosion occurs when thin layers of soil are removed
evenly.
9. Which is NOT an erosion control practice?
A) Silt fence
B) Riprap
C) Seeding
D) Soil excavation without control
Answer: D) Soil excavation without control
Rationale: Excavation without controls increases erosion risk.
10. Riprap is used to:
A) Fertilize soil
B) Stabilize channels and slopes
C) Increase erosion
D) Remove sediment
Answer: B) Stabilize channels and slopes
Rationale: Riprap consists of rock used to reduce erosion from flowing
water.
11. What is turbidity?
A) Soil compaction level
Certification Exam Practice Questions
And Correct Answers (Verified Answers)
Plus Rationales 2026 Q&A | Instant
Download Pdf
1. What is the primary goal of erosion control on construction sites?
A) Increase water runoff speed
B) Prevent soil loss and sediment transport
C) Remove vegetation permanently
D) Increase soil compaction
Answer: B) Prevent soil loss and sediment transport
Rationale: Erosion control aims to minimize soil displacement and
prevent sediment from leaving the construction site.
2. Which document typically governs erosion and sediment control on a
construction site?
A) OSHA safety plan
B) SWPPP
, C) Building blueprint
D) Traffic control plan
Answer: B) SWPPP
Rationale: The Stormwater Pollution Prevention Plan (SWPPP)
outlines measures to control erosion and sedimentation.
3. What is the function of a silt fence?
A) Increase infiltration
B) Filter sediment from runoff
C) Redirect wind flow
D) Stabilize building foundations
Answer: B) Filter sediment from runoff
Rationale: Silt fences trap sediment while allowing water to pass
through.
4. Which soil type is most prone to erosion?
A) Clay
B) Gravel
C) Sand
D) Rock
Answer: C) Sand
Rationale: Sandy soils have large particles and low cohesion, making
them easily erodible.
5. Best practice to reduce erosion on steep slopes includes:
A) Removing vegetation
, B) Increasing runoff velocity
C) Installing slope stabilization measures
D) Compacting soil heavily
Answer: C) Installing slope stabilization measures
Rationale: Stabilization like mats or vegetation reduces soil
movement on slopes.
6. What is sediment?
A) Clean water
B) Soil particles transported by water or wind
C) Fertilizer
D) Bedrock fragments only
Answer: B) Soil particles transported by water or wind
Rationale: Sediment refers to eroded soil particles carried by runoff or
wind.
7. Which BMP helps reduce erosion immediately after soil disturbance?
A) Tree removal
B) Mulching
C) Asphalt paving
D) Excavation
Answer: B) Mulching
Rationale: Mulch protects exposed soil from rain impact and runoff.
8. What causes sheet erosion?
A) Concentrated water flow
, B) Uniform removal of soil by rainfall runoff
C) Wind only
D) Chemical reactions
Answer: B) Uniform removal of soil by rainfall runoff
Rationale: Sheet erosion occurs when thin layers of soil are removed
evenly.
9. Which is NOT an erosion control practice?
A) Silt fence
B) Riprap
C) Seeding
D) Soil excavation without control
Answer: D) Soil excavation without control
Rationale: Excavation without controls increases erosion risk.
10. Riprap is used to:
A) Fertilize soil
B) Stabilize channels and slopes
C) Increase erosion
D) Remove sediment
Answer: B) Stabilize channels and slopes
Rationale: Riprap consists of rock used to reduce erosion from flowing
water.
11. What is turbidity?
A) Soil compaction level
