NPDES Level 1A Practice test exam with questions and answers (100% solved)
A buffer zone is required along the banks of state waters. How is it determined where to
measure from on the stream bank?
A) From the center of the channel
B) From the area of wrested vegetation
C) From the area adjacent to the stream that is subject to overflow, as indicated by water loving
plants
D) From the water side edge of plants growing in the water - ✔✔✔-B) From the area of wrested
vegetation
A diversion constructed of compacted soil can be positioned ________ a slope.
A) Above
B) Across
C) Below
D) All of the above - ✔✔✔-B) Across
A retrofit utilizing a slotted board dam can be used on projects with a larger drainage area than
a retrofit utilizing perforated half round pipe.
A) True
B) False - ✔✔✔-B) False
A single temporary sediment basin may not be utilized for a drainage area larger than ______
acres.
A) 225
B) 167
C) 150
D) 120 - ✔✔✔-C) 150
, NPDES Level 1A Practice test exam with questions and answers (100% solved)
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 - ✔✔✔-C) 25
A stream channel diversion can only be constructed on streams with a drainage area less than
_________ acres.
A) 830
B) 725
C) 640
D) 500 - ✔✔✔-C) 640
A temporary down drain structure using a 12 inch pipe could drain up to ________ acres.
A) 0.3
B) 0.5
C) 0.4
D) 1.0 - ✔✔✔-D) 1.0
A temporary sediment basin shall be designed by whom?
A) A certified design professional
B) The property owner/ operator
C) A person certified at Level 1A or 1B by GSWCC
D) A building inspector - ✔✔✔-A) A certified design professional
A buffer zone is required along the banks of state waters. How is it determined where to
measure from on the stream bank?
A) From the center of the channel
B) From the area of wrested vegetation
C) From the area adjacent to the stream that is subject to overflow, as indicated by water loving
plants
D) From the water side edge of plants growing in the water - ✔✔✔-B) From the area of wrested
vegetation
A diversion constructed of compacted soil can be positioned ________ a slope.
A) Above
B) Across
C) Below
D) All of the above - ✔✔✔-B) Across
A retrofit utilizing a slotted board dam can be used on projects with a larger drainage area than
a retrofit utilizing perforated half round pipe.
A) True
B) False - ✔✔✔-B) False
A single temporary sediment basin may not be utilized for a drainage area larger than ______
acres.
A) 225
B) 167
C) 150
D) 120 - ✔✔✔-C) 150
, NPDES Level 1A Practice test exam with questions and answers (100% solved)
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 - ✔✔✔-C) 25
A stream channel diversion can only be constructed on streams with a drainage area less than
_________ acres.
A) 830
B) 725
C) 640
D) 500 - ✔✔✔-C) 640
A temporary down drain structure using a 12 inch pipe could drain up to ________ acres.
A) 0.3
B) 0.5
C) 0.4
D) 1.0 - ✔✔✔-D) 1.0
A temporary sediment basin shall be designed by whom?
A) A certified design professional
B) The property owner/ operator
C) A person certified at Level 1A or 1B by GSWCC
D) A building inspector - ✔✔✔-A) A certified design professional
