NPDES Level 1A Practice Test
Study online at https://quizlet.com/_je18aw
1. A slope gradient of 25% (4:1) would indicate that in a C) 25
horizontal length of 100 feet, the vertical rise would be
______ feet.
A) 2.5
B) 12.5
C) 25
D) 4
2. As rain falls to the earth, what is the very first function A) It reduces detachment
of vegetation?
A) It reduces detachment
B) It increases infiltration
C) It absorbs rain drop impact
D) Roots hold soil in place
3. Because of the likelihood of thunderstorms which is B) July
the worst month to schedule land disturbing activi-
ties?
A) April
B) July
C) September
D) October
4. Which of the following is not a stage in Erosion and B) Solubility
Sedimentation?
A) Detachment
B) Solubility
C) Transport
D) Deposition
5. At what depth must sediment be removed from a silt D) 1/2 full
fence barrier?
1/9
, NPDES Level 1A Practice Test
Study online at https://quizlet.com/_je18aw
A) 12 Inches
B) 16 Inches
C) 1/4 full
D) 1/2 full
6. When straw mulch is used to cover disturbed soil it D) 2-4
must be maintained at a depth of ________ inches.
A) 1-2
B) 1-3
C) 2-3
D) 2-4
7. If it is necessary to wash vehicle tires to remove excess C) Directed away from the
sediment, the sediment run-off must be: road with a diversion
A) Kept at the construction exit pad
B) Filtered with hay bales
C) Directed away from the road with a diversion
D) Directed into an approved sediment trap or sedi-
ment basin
8. The maintenance requirements for all BMPs are only A) True
found in the Field Manual for Erosion and Sediment
Control in Georgia.
A) True
B) False
9. All land-disturbing activities covered by the E & SC C) Owner/ Operator
Act must first secure a Land Disturbing Activity (LDA)
Permit. Who is responsible for obtaining this permit?
A) Design Engineer
B) Building Contractor
C) Owner/ Operator
D) Utility Subcontractor
2/9
Study online at https://quizlet.com/_je18aw
1. A slope gradient of 25% (4:1) would indicate that in a C) 25
horizontal length of 100 feet, the vertical rise would be
______ feet.
A) 2.5
B) 12.5
C) 25
D) 4
2. As rain falls to the earth, what is the very first function A) It reduces detachment
of vegetation?
A) It reduces detachment
B) It increases infiltration
C) It absorbs rain drop impact
D) Roots hold soil in place
3. Because of the likelihood of thunderstorms which is B) July
the worst month to schedule land disturbing activi-
ties?
A) April
B) July
C) September
D) October
4. Which of the following is not a stage in Erosion and B) Solubility
Sedimentation?
A) Detachment
B) Solubility
C) Transport
D) Deposition
5. At what depth must sediment be removed from a silt D) 1/2 full
fence barrier?
1/9
, NPDES Level 1A Practice Test
Study online at https://quizlet.com/_je18aw
A) 12 Inches
B) 16 Inches
C) 1/4 full
D) 1/2 full
6. When straw mulch is used to cover disturbed soil it D) 2-4
must be maintained at a depth of ________ inches.
A) 1-2
B) 1-3
C) 2-3
D) 2-4
7. If it is necessary to wash vehicle tires to remove excess C) Directed away from the
sediment, the sediment run-off must be: road with a diversion
A) Kept at the construction exit pad
B) Filtered with hay bales
C) Directed away from the road with a diversion
D) Directed into an approved sediment trap or sedi-
ment basin
8. The maintenance requirements for all BMPs are only A) True
found in the Field Manual for Erosion and Sediment
Control in Georgia.
A) True
B) False
9. All land-disturbing activities covered by the E & SC C) Owner/ Operator
Act must first secure a Land Disturbing Activity (LDA)
Permit. Who is responsible for obtaining this permit?
A) Design Engineer
B) Building Contractor
C) Owner/ Operator
D) Utility Subcontractor
2/9
