NPDES Level 1A Practice Test Questions With Correct Answers.

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
| | | |