1
NPDES Class 2025/2026 Exam
Questions and Verified Answers |
Already Graded A+
Erosion - 🧠 ANSWER ✔✔is the process by which the land surface is worn away
by the action of wind, water, and gravity.
Sedimentation - 🧠 ANSWER ✔✔is the settling out of soil particles transported by
water and wind.
Soil erosion can be classified as 2 types. What are they? - 🧠 ANSWER ✔✔Wind
and Water.
What are the two sources of Soil erosion. - 🧠 ANSWER ✔✔Natural and Manmade
Water erosion can be classified as two type of erosions. What are they? - 🧠
ANSWER ✔✔Overland and Stream/Channel erosion.
Four process of overland erosion are? - 🧠 ANSWER ✔✔Splash, sheet, rill, and
gully erosion.
COPYRIGHT©NINJANERD 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY 1
STATEMENT. ALL RIGHTS RESERVED
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Four principle factors influencing soil erosion are? - 🧠 ANSWER ✔✔Soil
characteristics, vegetative cover, topography, and climate.
List three physical effect of erosion and sedimentation: - 🧠 ANSWER
✔✔Increased flooding reduced hydraulic capacity in rivers, and streams; increased
maintenance of stormwater systems.; increased water treatments cost; and
decreased recreational value.
List three biological effect of erosion and sedimentation: - 🧠 ANSWER
✔✔Reduced light for aquatic plants; clogs fish gills; impairs spawning; disrupts
food chain; blankets bottom, suppresses aquatic life; and disrupts ecosystem.
Planning the development to fit the terrain using the particular: - 🧠 ANSWER
✔✔Topography; soils; drainage patterns; natural vegetation of the site; and
minimize the extent of the area exposed at one time and the duration of exposure.
Perimeter Control Practices - 🧠 ANSWER ✔✔What you apply to protect the
disturbed area from off-site runoff and to protect off-site areas from sediment
damage.
Erosion Control Practices - 🧠 ANSWER ✔✔What you apply to prevent excessive
on-site damage.
COPYRIGHT©NINJANERD 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY 2
STATEMENT. ALL RIGHTS RESERVED
, 3
Keep runoff velocities _____ and _______ runoff on the site - 🧠 ANSWER
✔✔Low and retain
When do you stabilize disturbed areas after final grading to prevent raindrop
impacts from causing erosion. - 🧠 ANSWER ✔✔Immediately
Implement a thorough _____ and _____(inspection) program as required in the
Construction Generic Permit (CGP). - 🧠 ANSWER ✔✔maintenance and follow up
Soil particles smaller than 0.002 mm are classified as ____ and along with ____
are the two soil types that cause the most erosion/turbidity problems in Florida and
the World. - 🧠 ANSWER ✔✔clay and muck
Soils in the Type A hydrologic group have ____ infiltration rates and ____ runoff
potential even when thoroughly wetted. - 🧠 ANSWER ✔✔high and low
Soils in the Type D hydrologic group have very ____ infiltration rates and ____
runoff potential when thoroughly wetted. - 🧠 ANSWER ✔✔low and high
What is the rainfall erosion index? - 🧠 ANSWER ✔✔The rainfall erosion index is
the only factor in the Universal Soil Loss Equation which is beyond the developer's
control.
COPYRIGHT©NINJANERD 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY 3
STATEMENT. ALL RIGHTS RESERVED
NPDES Class 2025/2026 Exam
Questions and Verified Answers |
Already Graded A+
Erosion - 🧠 ANSWER ✔✔is the process by which the land surface is worn away
by the action of wind, water, and gravity.
Sedimentation - 🧠 ANSWER ✔✔is the settling out of soil particles transported by
water and wind.
Soil erosion can be classified as 2 types. What are they? - 🧠 ANSWER ✔✔Wind
and Water.
What are the two sources of Soil erosion. - 🧠 ANSWER ✔✔Natural and Manmade
Water erosion can be classified as two type of erosions. What are they? - 🧠
ANSWER ✔✔Overland and Stream/Channel erosion.
Four process of overland erosion are? - 🧠 ANSWER ✔✔Splash, sheet, rill, and
gully erosion.
COPYRIGHT©NINJANERD 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY 1
STATEMENT. ALL RIGHTS RESERVED
,2
Four principle factors influencing soil erosion are? - 🧠 ANSWER ✔✔Soil
characteristics, vegetative cover, topography, and climate.
List three physical effect of erosion and sedimentation: - 🧠 ANSWER
✔✔Increased flooding reduced hydraulic capacity in rivers, and streams; increased
maintenance of stormwater systems.; increased water treatments cost; and
decreased recreational value.
List three biological effect of erosion and sedimentation: - 🧠 ANSWER
✔✔Reduced light for aquatic plants; clogs fish gills; impairs spawning; disrupts
food chain; blankets bottom, suppresses aquatic life; and disrupts ecosystem.
Planning the development to fit the terrain using the particular: - 🧠 ANSWER
✔✔Topography; soils; drainage patterns; natural vegetation of the site; and
minimize the extent of the area exposed at one time and the duration of exposure.
Perimeter Control Practices - 🧠 ANSWER ✔✔What you apply to protect the
disturbed area from off-site runoff and to protect off-site areas from sediment
damage.
Erosion Control Practices - 🧠 ANSWER ✔✔What you apply to prevent excessive
on-site damage.
COPYRIGHT©NINJANERD 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY 2
STATEMENT. ALL RIGHTS RESERVED
, 3
Keep runoff velocities _____ and _______ runoff on the site - 🧠 ANSWER
✔✔Low and retain
When do you stabilize disturbed areas after final grading to prevent raindrop
impacts from causing erosion. - 🧠 ANSWER ✔✔Immediately
Implement a thorough _____ and _____(inspection) program as required in the
Construction Generic Permit (CGP). - 🧠 ANSWER ✔✔maintenance and follow up
Soil particles smaller than 0.002 mm are classified as ____ and along with ____
are the two soil types that cause the most erosion/turbidity problems in Florida and
the World. - 🧠 ANSWER ✔✔clay and muck
Soils in the Type A hydrologic group have ____ infiltration rates and ____ runoff
potential even when thoroughly wetted. - 🧠 ANSWER ✔✔high and low
Soils in the Type D hydrologic group have very ____ infiltration rates and ____
runoff potential when thoroughly wetted. - 🧠 ANSWER ✔✔low and high
What is the rainfall erosion index? - 🧠 ANSWER ✔✔The rainfall erosion index is
the only factor in the Universal Soil Loss Equation which is beyond the developer's
control.
COPYRIGHT©NINJANERD 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY 3
STATEMENT. ALL RIGHTS RESERVED
