5/1/26, 6:31 NPDES Level 1A Practice T flashcard sets |
AM Quizlet
NPDES Level 1A Practice Test 2025/2026 – 100+ Questions on
BMPs, Soil Erosion, Sediment Control, Permit Rules & Georgia
State Compliance
A slope gradient of 25% (4:1) would indicate that in a horizontal length of 100 feet,
the vertical rise would be feet.
A) 2.5
B) 12.5
C) 25
D) 4
C) 25
As rain falls to the earth, what is the very first function of vegetation?
A) It reduces detachment
B) It increases infiltration
C) It absorbs rain drop impact
D) Roots hold soil in place
A) It reduces detachment
Because of the likelihood of thunderstorms which is the worst month to schedule land
disturbing activities?
A) April
B) July
C) September
D) October
B) July
Which of the following is not a stage in Erosion and Sedimentation?
A) Detachment
B) Solubility
C) Transport
D) Deposition
B) Solubility
At what depth must sediment be removed from a silt fence barrier?
A) 12 Inches
B) 16 Inches
https://quizlet.com/search?query=NPDES-Level-1A-Practice- 1/
Test&type=sets 10
, 5/1/26, 6:31 NPDES Level 1A Practice T flashcard sets |
AMC) 1/4 full Quizlet
D) 1/2 full
https://quizlet.com/search?query=NPDES-Level-1A-Practice- 2/
Test&type=sets 10
AM Quizlet
NPDES Level 1A Practice Test 2025/2026 – 100+ Questions on
BMPs, Soil Erosion, Sediment Control, Permit Rules & Georgia
State Compliance
A slope gradient of 25% (4:1) would indicate that in a horizontal length of 100 feet,
the vertical rise would be feet.
A) 2.5
B) 12.5
C) 25
D) 4
C) 25
As rain falls to the earth, what is the very first function of vegetation?
A) It reduces detachment
B) It increases infiltration
C) It absorbs rain drop impact
D) Roots hold soil in place
A) It reduces detachment
Because of the likelihood of thunderstorms which is the worst month to schedule land
disturbing activities?
A) April
B) July
C) September
D) October
B) July
Which of the following is not a stage in Erosion and Sedimentation?
A) Detachment
B) Solubility
C) Transport
D) Deposition
B) Solubility
At what depth must sediment be removed from a silt fence barrier?
A) 12 Inches
B) 16 Inches
https://quizlet.com/search?query=NPDES-Level-1A-Practice- 1/
Test&type=sets 10
, 5/1/26, 6:31 NPDES Level 1A Practice T flashcard sets |
AMC) 1/4 full Quizlet
D) 1/2 full
https://quizlet.com/search?query=NPDES-Level-1A-Practice- 2/
Test&type=sets 10
