1|Page
EROSION AND SEDIMENT CONTROL
QUESTIONS & VERIFIED SOLUTIONS 2025
The maximum drainage area for a temporary asphalt berm is:
a. 2.5 acres
b. 3 acres
c. 1.5 acres
d. 1 acre-correct-answer-c. 1.5 acres
If an approved erosion and sediment control plan includes a clear water diversion
pipe for diverting a streamflow, then a waterway construction permit from MDE is
not required.
a. true
b. false-correct-answer-b. false
A mountable berm is typically used where an earth dike needs to be traversed by
construction equipment.
a. true
b. false-correct-answer-a. true
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The following material is used in conjunction with diversion fence:
a. woven slit film geotextile
b. woven monofilament geotextile
c. 10 ML or thicker impervious sheeting
d. nonwoven geotextile
e. none of the above-correct-answer-c. 10 ML or thicker impervious sheeting
When installing diversion fence, the sheeting must extend __________ down the
backside of the chain link fencing.
a. 8 inches
b. 12 inches
c. half-way
d. entirely-correct-answer-d. entirely
Diversion fence can only be used as a clear water diversion.
a. true
b. false-correct-answer-b. false
The erosion control practices included in the 2011 Handbook serve to:
a. act as energy dissipaters
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b. provide for the stable conveyance of water
c. convey runoff down a slope in a non-erosive manner
d. reduce the velocity
e. all of the above-correct-answer-e. all of the above
When installing a pipe drain in an earth dike, the height of the dike must be at
least:
a. five inches above the top of the pipe
b. two times the pipe diameter measured from the pipe's invert
c. three times the diameter measured from the pipe's invert
d. level with the top of the pipe-correct-answer-b. two times the pipe diameter
measured from the pipe's invert
When pipe slope drain discharges to a sediment trap or basin, the outlet must:
a. discharge at or above the wet pool elevation
b. discharge onto the bottom of the trap or basin
c. extend at least three feet into the center of the trap
d. it doesn't matter where the discharge is placed-correct-answer-a. discharge at
or above the wet pool elevation
Stone check dams are designed to:
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a. trap sediment
b. filter sediment
c. reduce velocity
d. all of the above-correct-answer-c. reduce velocity
Spacing between stone check dams is based on:
a. the velocity of runoff in the flow channel
b. the drainage area coming to the check dam
c. the slope of the channel
d. none of the above-correct-answer-c. the slope of the flow channel
Stabilization of inflow channels to a sediment trap or basins is not required since
any sediment runoff due to channel erosion is captured by the trap or basin.
a. true
b. false-correct-answer-b. false
The minimum width for a riprap inflow channel is:
a. two feet
b. three feet
c. four feet
EROSION AND SEDIMENT CONTROL
QUESTIONS & VERIFIED SOLUTIONS 2025
The maximum drainage area for a temporary asphalt berm is:
a. 2.5 acres
b. 3 acres
c. 1.5 acres
d. 1 acre-correct-answer-c. 1.5 acres
If an approved erosion and sediment control plan includes a clear water diversion
pipe for diverting a streamflow, then a waterway construction permit from MDE is
not required.
a. true
b. false-correct-answer-b. false
A mountable berm is typically used where an earth dike needs to be traversed by
construction equipment.
a. true
b. false-correct-answer-a. true
,2|Page
The following material is used in conjunction with diversion fence:
a. woven slit film geotextile
b. woven monofilament geotextile
c. 10 ML or thicker impervious sheeting
d. nonwoven geotextile
e. none of the above-correct-answer-c. 10 ML or thicker impervious sheeting
When installing diversion fence, the sheeting must extend __________ down the
backside of the chain link fencing.
a. 8 inches
b. 12 inches
c. half-way
d. entirely-correct-answer-d. entirely
Diversion fence can only be used as a clear water diversion.
a. true
b. false-correct-answer-b. false
The erosion control practices included in the 2011 Handbook serve to:
a. act as energy dissipaters
,3|Page
b. provide for the stable conveyance of water
c. convey runoff down a slope in a non-erosive manner
d. reduce the velocity
e. all of the above-correct-answer-e. all of the above
When installing a pipe drain in an earth dike, the height of the dike must be at
least:
a. five inches above the top of the pipe
b. two times the pipe diameter measured from the pipe's invert
c. three times the diameter measured from the pipe's invert
d. level with the top of the pipe-correct-answer-b. two times the pipe diameter
measured from the pipe's invert
When pipe slope drain discharges to a sediment trap or basin, the outlet must:
a. discharge at or above the wet pool elevation
b. discharge onto the bottom of the trap or basin
c. extend at least three feet into the center of the trap
d. it doesn't matter where the discharge is placed-correct-answer-a. discharge at
or above the wet pool elevation
Stone check dams are designed to:
, 4|Page
a. trap sediment
b. filter sediment
c. reduce velocity
d. all of the above-correct-answer-c. reduce velocity
Spacing between stone check dams is based on:
a. the velocity of runoff in the flow channel
b. the drainage area coming to the check dam
c. the slope of the channel
d. none of the above-correct-answer-c. the slope of the flow channel
Stabilization of inflow channels to a sediment trap or basins is not required since
any sediment runoff due to channel erosion is captured by the trap or basin.
a. true
b. false-correct-answer-b. false
The minimum width for a riprap inflow channel is:
a. two feet
b. three feet
c. four feet
