Certified Storm Water Operator Exam Questions with Correct Answers 100% Verified By
Experts| 2025/2026 Latest Update
Erosion is the process where soil particles are ______________ or ____________ and put in
motion. (Unit 1) Dislodged; detached
Sedimentation is the process whereby detached particles are ___________________
elsewhere. (Unit 1) Deposited
Sediment is solid ________________ or _______________ particulate matter that has been
removed from its site of origin by ___________, _____________, or ______________ and
deposited elsewhere. (Unit 1) Mineral; organic; water; wind; gravity
Accelerated erosion is a speeding up of erosion due to ___________activity. (Unit 1) Human
Major erosive forces are water and ___________. (Unit 1) Wind
In some areas, more soil is lost from ______________ erosion than from water erosion. (Unit 1)
Wind
The effects of _____________ erosion are usually more visible than _____________ erosion.
(Unit 1) Water; wind
The three categories of overland erosion are: (Unit 1) Sheet, rill, gully
_____________ erosion is the removal of a uniform layer of soil from rain-splash and storm
water runoff. (Unit 1) Sheet
The ____________ of erosion defines the difference between rills and gullies. (Unit 1) Depth
,The physical factors affecting erosion are: (Unit 1) Climate, vegetative cover, soils, slope.
Erosion and sedimentation may cause:
-Loss of ___________ _______________
-__________________ damage to roads, buildings or bridges.
-___________________, resulting in reduction of fish _______________ _________, reduced
_____________ or _______________ _______________ capacity, and ______________ costs
to maintain ______________.
-_________________ loading. (Unit 1) - fertile topsoil
- Structural
- Deposition; spawning areas; channel; storm drain; increased; turbidity
- Pollutant
The climatic factors that strongly influence erosion and runoff are _______________ amount,
_______________, and ________________. (Unit 1) Rainfall, frequency, intensity.
Soil properties influencing erodibility include: (Unit 1) Texture, structure, cohesion, natural
drainage class
Texture refers to the ___________ or _____________________ of ____________ of soil
particles in soil. (Unit 1) Size; combination of sizes
Structure refers to the degree to which individual soil particles _____________ to each other.
(Unit 1) Adhere
Slope _________________, _____________________, and ___________________ affect
erodibility. (Unit 1) Steepness, length, and roughness.
, Sediment deposition occurs when soil-laden wind or water ____________ enough to allow the
soil particles to settle out. (Unit 1) Slows
The ____________, _______________, and ________________ of the transported particles
influence the rate at which they settle out. (Unit 1) Size, shape, and density.
Smaller, lighter particles such as __________________ particles are easily transported and are
_____________________ to settle out. (Unit 1) Clay-sized; slow/difficult
The Five Principles of Erosion and Sedimentation Control are:
-____________ the development to fit the natural site conditions
-Expose the ________________ practical area for the _________________ possible time
-Apply __________ _________________ prevention practices as first life of defense
-Apply ___________________ control practices to prevent off-site sedimentation
-Implement a thorough __________________, ___________________, and
_____________________ program. (Unit 1) - Plan
- Smallest; shortest
- Soil erosion
- Sediment
- Inspection, maintenance, and follow-up
The most effective way to prevent erosion is keep the soil covered with __________________.
(Unit 1) Vegetation
It is much more effective to prevent ____________ than to control the ____________________
generated from erosion. (Unit 1) Erosion; sediment
Experts| 2025/2026 Latest Update
Erosion is the process where soil particles are ______________ or ____________ and put in
motion. (Unit 1) Dislodged; detached
Sedimentation is the process whereby detached particles are ___________________
elsewhere. (Unit 1) Deposited
Sediment is solid ________________ or _______________ particulate matter that has been
removed from its site of origin by ___________, _____________, or ______________ and
deposited elsewhere. (Unit 1) Mineral; organic; water; wind; gravity
Accelerated erosion is a speeding up of erosion due to ___________activity. (Unit 1) Human
Major erosive forces are water and ___________. (Unit 1) Wind
In some areas, more soil is lost from ______________ erosion than from water erosion. (Unit 1)
Wind
The effects of _____________ erosion are usually more visible than _____________ erosion.
(Unit 1) Water; wind
The three categories of overland erosion are: (Unit 1) Sheet, rill, gully
_____________ erosion is the removal of a uniform layer of soil from rain-splash and storm
water runoff. (Unit 1) Sheet
The ____________ of erosion defines the difference between rills and gullies. (Unit 1) Depth
,The physical factors affecting erosion are: (Unit 1) Climate, vegetative cover, soils, slope.
Erosion and sedimentation may cause:
-Loss of ___________ _______________
-__________________ damage to roads, buildings or bridges.
-___________________, resulting in reduction of fish _______________ _________, reduced
_____________ or _______________ _______________ capacity, and ______________ costs
to maintain ______________.
-_________________ loading. (Unit 1) - fertile topsoil
- Structural
- Deposition; spawning areas; channel; storm drain; increased; turbidity
- Pollutant
The climatic factors that strongly influence erosion and runoff are _______________ amount,
_______________, and ________________. (Unit 1) Rainfall, frequency, intensity.
Soil properties influencing erodibility include: (Unit 1) Texture, structure, cohesion, natural
drainage class
Texture refers to the ___________ or _____________________ of ____________ of soil
particles in soil. (Unit 1) Size; combination of sizes
Structure refers to the degree to which individual soil particles _____________ to each other.
(Unit 1) Adhere
Slope _________________, _____________________, and ___________________ affect
erodibility. (Unit 1) Steepness, length, and roughness.
, Sediment deposition occurs when soil-laden wind or water ____________ enough to allow the
soil particles to settle out. (Unit 1) Slows
The ____________, _______________, and ________________ of the transported particles
influence the rate at which they settle out. (Unit 1) Size, shape, and density.
Smaller, lighter particles such as __________________ particles are easily transported and are
_____________________ to settle out. (Unit 1) Clay-sized; slow/difficult
The Five Principles of Erosion and Sedimentation Control are:
-____________ the development to fit the natural site conditions
-Expose the ________________ practical area for the _________________ possible time
-Apply __________ _________________ prevention practices as first life of defense
-Apply ___________________ control practices to prevent off-site sedimentation
-Implement a thorough __________________, ___________________, and
_____________________ program. (Unit 1) - Plan
- Smallest; shortest
- Soil erosion
- Sediment
- Inspection, maintenance, and follow-up
The most effective way to prevent erosion is keep the soil covered with __________________.
(Unit 1) Vegetation
It is much more effective to prevent ____________ than to control the ____________________
generated from erosion. (Unit 1) Erosion; sediment
