CERTIFIED EROSION PREVENTION AND SEDIMENT CONTROL
INSPECTOR (CEPSCI) EXAMINATION COMPLETE QUESTIONS
AND DETAILED SOLUTIONS LATEST UPDATE THIS YEAR JUST
RELEASED
1. Which condition most directly causes accelerated erosion on an active
construction site?
A. Increased vegetation cover
B. Concentrated runoff flowing across exposed soil
C. Reduced rainfall intensity
D. Installation of perimeter controls
Answer: B
Rationale: Concentrated runoff increases flow velocity and shear stress, allowing
water to detach and transport exposed soil particles.
2. What is the primary purpose of erosion prevention measures on a
construction project?
A. Increase sediment storage capacity
B. Prevent soil particles from becoming detached
C. Replace all sediment-control practices
D. Increase stormwater discharge rates
Answer: B
Rationale: Erosion prevention focuses on keeping soil in place through
stabilization, vegetation, mulching, reduced disturbance, and runoff
management.
,3. Which construction practice generally provides the greatest reduction in
erosion potential?
A. Clearing the entire site immediately
B. Leaving soil exposed until project completion
C. Minimizing the area and duration of soil disturbance
D. Increasing the number of site entrances
Answer: C
Rationale: Limiting disturbed acreage and exposure time reduces the amount of
soil available for erosion.
4. What is the principal function of a sediment basin?
A. Generate additional runoff
B. Remove sediment from stormwater before discharge
C. Increase soil compaction throughout the site
D. Eliminate the need for stabilization
Answer: B
Rationale: Sediment basins temporarily detain runoff so suspended soil particles
can settle before water leaves the site.
5. Why should an inspector examine drainage patterns during every
construction-site inspection?
A. Drainage patterns never change during construction
B. Construction activities can redirect runoff into vulnerable areas
C. Drainage patterns only matter after final stabilization
D. Drainage inspections are required only during droughts
,Answer: B
Rationale: Grading, stockpiles, roads, and structures can alter runoff pathways
and create new erosion problems.
6. Which factor most strongly influences the erosive power of flowing water?
A. Flow velocity
B. Soil color
C. Fence height alone
D. Air temperature
Answer: A
Rationale: Increasing water velocity substantially increases the ability of flowing
water to detach and transport soil.
7. What is the primary purpose of construction-site perimeter controls?
A. Prevent all rainfall from reaching the site
B. Keep sediment from leaving disturbed areas
C. Increase construction traffic
D. Eliminate soil stabilization requirements
Answer: B
Rationale: Perimeter controls intercept or filter sediment-laden runoff before it
reaches adjoining properties or receiving waters.
8. Which soil condition generally has the greatest infiltration capacity?
A. Highly compacted clay
B. Dense paved surface
, C. Well-structured, uncompacted soil
D. Frozen impervious soil
Answer: C
Rationale: Uncompacted soil with good structure and pore space generally allows
greater infiltration than compacted or impervious surfaces.
9. What is sheet erosion?
A. Erosion caused exclusively by wind
B. Uniform removal of a thin layer of soil by shallow overland flow
C. Deep erosion occurring only in channels
D. Failure of a sediment basin embankment
Answer: B
Rationale: Sheet erosion occurs when relatively shallow, distributed runoff
removes soil from broad surfaces.
10. What distinguishes rill erosion from sheet erosion?
A. Rill erosion forms small concentrated channels
B. Rill erosion occurs only below sediment basins
C. Sheet erosion always produces deep gullies
D. Rill erosion cannot occur on construction sites
Answer: A
Rationale: Rills develop when overland flow becomes concentrated into small
channels that can deepen if unchecked.
INSPECTOR (CEPSCI) EXAMINATION COMPLETE QUESTIONS
AND DETAILED SOLUTIONS LATEST UPDATE THIS YEAR JUST
RELEASED
1. Which condition most directly causes accelerated erosion on an active
construction site?
A. Increased vegetation cover
B. Concentrated runoff flowing across exposed soil
C. Reduced rainfall intensity
D. Installation of perimeter controls
Answer: B
Rationale: Concentrated runoff increases flow velocity and shear stress, allowing
water to detach and transport exposed soil particles.
2. What is the primary purpose of erosion prevention measures on a
construction project?
A. Increase sediment storage capacity
B. Prevent soil particles from becoming detached
C. Replace all sediment-control practices
D. Increase stormwater discharge rates
Answer: B
Rationale: Erosion prevention focuses on keeping soil in place through
stabilization, vegetation, mulching, reduced disturbance, and runoff
management.
,3. Which construction practice generally provides the greatest reduction in
erosion potential?
A. Clearing the entire site immediately
B. Leaving soil exposed until project completion
C. Minimizing the area and duration of soil disturbance
D. Increasing the number of site entrances
Answer: C
Rationale: Limiting disturbed acreage and exposure time reduces the amount of
soil available for erosion.
4. What is the principal function of a sediment basin?
A. Generate additional runoff
B. Remove sediment from stormwater before discharge
C. Increase soil compaction throughout the site
D. Eliminate the need for stabilization
Answer: B
Rationale: Sediment basins temporarily detain runoff so suspended soil particles
can settle before water leaves the site.
5. Why should an inspector examine drainage patterns during every
construction-site inspection?
A. Drainage patterns never change during construction
B. Construction activities can redirect runoff into vulnerable areas
C. Drainage patterns only matter after final stabilization
D. Drainage inspections are required only during droughts
,Answer: B
Rationale: Grading, stockpiles, roads, and structures can alter runoff pathways
and create new erosion problems.
6. Which factor most strongly influences the erosive power of flowing water?
A. Flow velocity
B. Soil color
C. Fence height alone
D. Air temperature
Answer: A
Rationale: Increasing water velocity substantially increases the ability of flowing
water to detach and transport soil.
7. What is the primary purpose of construction-site perimeter controls?
A. Prevent all rainfall from reaching the site
B. Keep sediment from leaving disturbed areas
C. Increase construction traffic
D. Eliminate soil stabilization requirements
Answer: B
Rationale: Perimeter controls intercept or filter sediment-laden runoff before it
reaches adjoining properties or receiving waters.
8. Which soil condition generally has the greatest infiltration capacity?
A. Highly compacted clay
B. Dense paved surface
, C. Well-structured, uncompacted soil
D. Frozen impervious soil
Answer: C
Rationale: Uncompacted soil with good structure and pore space generally allows
greater infiltration than compacted or impervious surfaces.
9. What is sheet erosion?
A. Erosion caused exclusively by wind
B. Uniform removal of a thin layer of soil by shallow overland flow
C. Deep erosion occurring only in channels
D. Failure of a sediment basin embankment
Answer: B
Rationale: Sheet erosion occurs when relatively shallow, distributed runoff
removes soil from broad surfaces.
10. What distinguishes rill erosion from sheet erosion?
A. Rill erosion forms small concentrated channels
B. Rill erosion occurs only below sediment basins
C. Sheet erosion always produces deep gullies
D. Rill erosion cannot occur on construction sites
Answer: A
Rationale: Rills develop when overland flow becomes concentrated into small
channels that can deepen if unchecked.
