Module 12 - Erosion and Sediment Control BMPs in Alabama

Question 1

Erosion Control Blanket: Which of the folling provides only the minimum amount of erosion resistance?
Biodegradable Erosion Control Blanket
Permanent Erosion Control Blanket
Turf Reinforment Mat
Netting

Answer 1

Netting

Question 2

Inlet protection is a practice of …
Runoff conveyance
Site preparation
Sediment Control
Surface stabilization

Answer 2

Sediment Control

Question 3

Which cross-sectional grass swale shapes are common?
Parabolic and triangular.
Round.
Triangular, parabolic, or trapezoidal.
Trapezoidal.

Answer 3

Triangular, parabolic, or trapezoidal.

Question 4

When mulching a sloped area …
A properly anchored erosion control blanket to keep the mulch in place.
A special permit is required.
Only straw must be used.
Only HECPs are permitted.

Answer 4

A properly anchored erosion control blanket to keep the mulch in place.

Question 5

Topsoiling is a practice of …
Surface stabilization
Site preparation
Sediment Control
Runoff conveyance

Answer 5

Site preparation

Question 6

Check dams: When is it necessary to excavate a shallow keyway across a channel?
In every check dam installation.
Never.
In compacted soils only.
In highly erosive soil conditions.

Answer 6

In highly erosive soil conditions.

Question 7

The minium aggregate depth of a construction exit bad is:
12 inches
9 inches
3 inches
6 inches

Answer 7

6 inches

Question 8

Sodding is a practice of …
Surface stabilization
Sediment Control
Site preparation
Runoff conveyance

Answer 8

Surface stabilization

Question 9

Chemical Stabilization: Applying products like polyacrylamide (PAM) near natural water bodies …:
can improve receiving water quality.
is prohibited by the Clean Water Act.
requires the establishment of a buffer zone.

Answer 9

requires the establishment of a buffer zone.

Question 10

Which 24-hour design storm criteria is typically used for permanent diversions?
2 to 5-year
100-year
10 to 50-year
10 to 100-year

Answer 10

10 to 50-year

Question 11

Preservation of Vegetation: Site clearing should never be closer than
5 feet to a branch of a tree.
5 feet to the trunk of a tree.
50 feet to the trunk of a tree.
15 feet to the trunk of a tree.

Answer 11

5 feet to the trunk of a tree.

Question 12

How is water from a sediment basin discharged under normal operating conditions?
Through a floating skimmer
It is not discharged, it is infiltrated
Through the storm drain
Through the spillway

Answer 12

Through a floating skimmer

Question 13

Which 24-hour design storm criteria is typically used for temporary diversions on construction sites?
10 to 50-year
100-year
10 to 100-year
2 to 5-year

Answer 13

2 to 5-year

Question 14

A favorable pH range for plant growth is usually:
4.0-8.0
7.0-8.0
6.0-6.5
6.0-7.5

Answer 14

6.0-6.5

Question 15

Check dams are used for drainage areas of
5 acres or less.
1 acre or less.
1 acre and more.
10 acres or less.

Answer 15

1 acre or less.

Question 16

Retaining wall is a practice of …
Site preparation
Sediment Control
Runoff conveyance
Surface stabilization

Answer 16

Surface stabilization

Question 17

What is the proper seedbed preparation for permanent seeding?
Tillage to a depth of 6 inches, application of lime and fertilizer.
Tillage to a depth of 6 inches, application of fertilizer.
Tillage to a depth of 6 inches.
Tillage to a depth of 6 inches, application of lime.

Answer 17

Tillage to a depth of 6 inches, application of lime and fertilizer.

Question 18

Erosion control blanket is a practice of …
Surface stabilization
Site preparation
Sediment Control
Runoff conveyance

Answer 18

Surface stabilization

Question 19

Chemical stabilization is a practice of …
Sediment Control
Runoff conveyance
Site preparation
Surface stabilization

Answer 19

Surface stabilization

Question 20

Floating turbidity barrier is a practice of …
Runoff conveyance
Site preparation
Surface stabilization
Sediment Control

Answer 20

Sediment Control

Question 20

Floating turbidity barrier is a practice of …
Runoff conveyance
Site preparation
Surface stabilization
Sediment Control

Answer 20

Sediment Control

Question 21

Filter strip is a practice of …
Surface stabilization
Site preparation
Sediment Control
Runoff conveyance

Answer 21

Sediment Control

Question 22

Flocculants have to be used together with which best management practice?

Floating Turbidity Barrier.
Mulching.
Sediment Barrier.
Sediment Basin.

Answer 22

Sediment Basin.

Question 23

Check dams have to be lined with
Straw.
Erosion control blankets.
Woven geotextile.
Non-woven geotextile.

Answer 23

Non-woven geotextile.

Question 24

Preservation of vegetation is a practice of ... Site preparation Runoff conveyance Surface stabilization Sediment Control

Answer 24

Surface stabilization

Question 25

In a seeded area, what percentage of the ground surface should be visible after mulching? 30% 50% 5% 25%

Answer 25

25%

Question 26

Mulching is a practice of ... Runoff conveyance Surface stabilization Site preparation Sediment Control

Answer 26

Surface stabilization

Question 27

Check dams can be build as: rock, wattle, silt fence, or sand bag check dam. rock, silt fence, or sand bag check dam. rock, wattle, or sand bag check dam. wattle, silt fence, or sand bag check dam.

Answer 27

rock, wattle, silt fence, or sand bag check dam.

Question 28

Check dam is a practice of ... Runoff conveyance Sediment Control Surface stabilization Site preparation

Answer 28

Runoff conveyance

Question 29

Rock check dams should be installed with side slopes 2:1 or steeper. 1:2 or steeper. 2:1 or flatter. 1:2 or flatter.

Answer 29

2:1 or flatter.

Question 30

Permanent seeding is a practice of ... Runoff conveyance Sediment Control Site preparation Surface stabilization

Answer 30

Surface stabilization

Question 31

Check dams Reduce turbidity. Improve infiltration capacities. Reduce runoff. Reduce channel erosion.

Answer 31

Reduce channel erosion.

Question 32

Erosion Control Blanket: Which of the following provides erosion protection for 1 to 5 years? Netting Biodegradable Erosion Control Blanket Permanent Erosion Control Blanket Turf Reinforcement Mat

Answer 32

Biodegradable Erosion Control Blanket

Question 33

Construction exit pad is a practice of ... Sediment Control Runoff conveyance Surface stabilization Site preparation

Answer 33

Site preparation

Question 34

The minimum width of a construction exit bad is: As required 50 feet 25 feet 30 feet

Answer 34

As required

Question 35

How can you ensure that water runs over a check dam and not around it? Materials are positioned to form a hyperbolic top perpendicularly to the channel flow. The crest of the dam is installed level. Materials are positioned to form a parabolic top perpendicularly to the channel flow. A non-woven geotextile is positioned on the dam.

Answer 35

Materials are positioned to form a parabolic top perpendicularly to the channel flow.

Question 36

Grass swale is a practice of ... Site preparation Surface stabilization Runoff conveyance Sediment Control

Answer 36

Runoff conveyance

Question 37

Temporary seeding is a practice of ... Surface stabilization Runoff conveyance Sediment Control Site preparation

Answer 37

Surface stabilization

Question 38

The minimum length of a construction exit bad is: 25 feet As required 50 feet 30 feet

Answer 38

50 feet

Question 39

Sediment basin is a practice of ... Runoff conveyance Sediment Control Surface stabilization Site preparation

Answer 39

Sediment Control

Question 40

Permanent seeding: If a soil test is not available, what is the recommended application rate of lime? 1 tons / acre on clayey and 2 ton / acre on sandy soils. 0.5 tons / acre. 2 tons / acre. 2 tons / acre on clayey and 1 ton / acre on sandy soils.

Answer 40

2 tons / acre on clayey and 1 ton / acre on sandy soils.

Question 41

How is water from a sediment basin discharged during high rainfall? Through a floating skimmer Through the storm drain It is not discharged, it is infiltrated Through the spillway

Answer 41

Through the spillway

Question 42

Outlet protection is a practice of ... Runoff conveyance Sediment Control Site preparation Surface stabilization

Answer 42

Runoff conveyance

Question 43

If installed correctly, check dams may capture Mainly silt-sized sediments. Suspended, clay-size sediments. Mainly coarser sediments.

Answer 43

Mainly coarser sediments.

Question 44

Flocculant is a practice of ... Sediment Control Site preparation Runoff conveyance Surface stabilization

Answer 44

Sediment Control

Question 45

Erosion Control Blanket: Which of the following provides erosion protection similar to stone or concrete liners? Turf Reinforcement Mat Netting Permanent Erosion Control Blanket Biodegradable Erosion Control Blanket

Answer 45

Turf Reinforcement Mat