CERTIFIED STORM WATER OPERATOR EXAM
2026 FULL MOCK TEST QUESTION BANK WITH
SOLUTIONS AND ENVIRONMENTAL CONTROL
GUIDE
◉ The ____________ of erosion defines the difference between rills and
gullies. (Unit 1). Answer: Depth
◉ The physical factors affecting erosion are: (Unit 1). Answer:
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). Answer: - 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).
Answer: Rainfall, frequency, intensity.
◉ Soil properties influencing erodibility include: (Unit 1). Answer:
Texture, structure, cohesion, natural drainage class
◉ Texture refers to the ___________ or _____________________ of ____________
of soil particles in soil. (Unit 1). Answer: Size; combination of sizes
◉ Structure refers to the degree to which individual soil particles
_____________ to each other. (Unit 1). Answer: Adhere
◉ Slope _________________, _____________________, and ___________________
affect erodibility. (Unit 1). Answer: Steepness, length, and roughness.
◉ Sediment deposition occurs when soil-laden wind or water
____________ enough to allow the soil particles to settle out. (Unit 1).
Answer: Slows
◉ The ____________, _______________, and ________________ of the
transported particles influence the rate at which they settle out.
(Unit 1). Answer: Size, shape, and density.
, ◉ Smaller, lighter particles such as __________________ particles are
easily transported and are _____________________ to settle out. (Unit 1).
Answer: 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). Answer: - 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). Answer: Vegetation
2026 FULL MOCK TEST QUESTION BANK WITH
SOLUTIONS AND ENVIRONMENTAL CONTROL
GUIDE
◉ The ____________ of erosion defines the difference between rills and
gullies. (Unit 1). Answer: Depth
◉ The physical factors affecting erosion are: (Unit 1). Answer:
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). Answer: - 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).
Answer: Rainfall, frequency, intensity.
◉ Soil properties influencing erodibility include: (Unit 1). Answer:
Texture, structure, cohesion, natural drainage class
◉ Texture refers to the ___________ or _____________________ of ____________
of soil particles in soil. (Unit 1). Answer: Size; combination of sizes
◉ Structure refers to the degree to which individual soil particles
_____________ to each other. (Unit 1). Answer: Adhere
◉ Slope _________________, _____________________, and ___________________
affect erodibility. (Unit 1). Answer: Steepness, length, and roughness.
◉ Sediment deposition occurs when soil-laden wind or water
____________ enough to allow the soil particles to settle out. (Unit 1).
Answer: Slows
◉ The ____________, _______________, and ________________ of the
transported particles influence the rate at which they settle out.
(Unit 1). Answer: Size, shape, and density.
, ◉ Smaller, lighter particles such as __________________ particles are
easily transported and are _____________________ to settle out. (Unit 1).
Answer: 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). Answer: - 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). Answer: Vegetation
