NPDES Level 1A Practice Test 2025/2026 – 100+ Questions on BMPs, Soil Erosion, Sediment Control, Permit Rules & Georgia State Compliance

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NPDES Level 1A Practice Test 2025/2026
Exam Questions and Answers | A+ Score
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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 - 🧠 ANSWER ✔✔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 - 🧠 ANSWER ✔✔A) It reduces detachment




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Because of the likelihood of thunderstorms which is the worst month to schedule

land disturbing activities?

A) April

B) July

C) September


D) October - 🧠 ANSWER ✔✔B) July


Which of the following is not a stage in Erosion and Sedimentation?

A) Detachment

B) Solubility

C) Transport


D) Deposition - 🧠 ANSWER ✔✔B) Solubility


At what depth must sediment be removed from a silt fence barrier?

A) 12 Inches

B) 16 Inches

C) 1/4 full


D) 1/2 full - 🧠 ANSWER ✔✔D) 1/2 full



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STATEMENT. ALL RIGHTS RESERVED