NPDES Level 1A Practice Test Questions
With Correct Answers
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 - CORRECT 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 - CORRECT ANSWER✔✔-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 - CORRECT ANSWER✔✔-B) July
| | | | |
, Which of the following is not a stage in Erosion and Sedimentation?
| | | | | | | | | | |
A) Detachment
|
B) Solubility
|
C) Transport
|
D) Deposition - CORRECT 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 - CORRECT ANSWER✔✔-D) 1/2 full
| | | | | | |
When straw mulch is used to cover disturbed soil it must be maintained at a
| | | | | | | | | | | | | | |
depth of ________ inches.
| | |
A) 1-2
|
B) 1-3
|
C) 2-3
|
D) 2-4 - CORRECT ANSWER✔✔-D) 2-4
| | | | |
If it is necessary to wash vehicle tires to remove excess sediment, the sediment
| | | | | | | | | | | | | |
run-off must be: | |
A) Kept at the construction exit pad
| | | | | |
B) Filtered with hay bales
| | | |
With Correct Answers
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 - CORRECT 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 - CORRECT ANSWER✔✔-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 - CORRECT ANSWER✔✔-B) July
| | | | |
, Which of the following is not a stage in Erosion and Sedimentation?
| | | | | | | | | | |
A) Detachment
|
B) Solubility
|
C) Transport
|
D) Deposition - CORRECT 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 - CORRECT ANSWER✔✔-D) 1/2 full
| | | | | | |
When straw mulch is used to cover disturbed soil it must be maintained at a
| | | | | | | | | | | | | | |
depth of ________ inches.
| | |
A) 1-2
|
B) 1-3
|
C) 2-3
|
D) 2-4 - CORRECT ANSWER✔✔-D) 2-4
| | | | |
If it is necessary to wash vehicle tires to remove excess sediment, the sediment
| | | | | | | | | | | | | |
run-off must be: | |
A) Kept at the construction exit pad
| | | | | |
B) Filtered with hay bales
| | | |
