NPDES Level 1A Practice Test – Accurate Answers To All Questions

NPDES Level 1A Practice Test – Accurate Answers
To All Questions

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Practice questions for this set


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B) 25



Choose an answer



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
1
B) 12.5
C) 25
D) 4



What size rocks should be used to fill gabion boxes?
A) 3 to 4 inches
2 B) 4 to 8 inches
C) Larger than 8 inches
D) Clean aggregate



At what depth must sediment be removed from a silt fence barrier?
A) 12 Inches
3 B) 16 Inches
C) 1/4 full
D) 1/2 full

, The minimum buffer for a warm water stream is ______ feet.
A) 15
4 B) 25
C) 35
D) 50


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Terms in this set (50)



A slope gradient of 25% (4:1) would C) 25
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


As rain falls to the earth, what is the A) It reduces detachment
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


Because of the likelihood of B) July
thunderstorms which is the worst
month to schedule land disturbing
activities?
A) April
B) July
C) September
D) October