EROSION AND SEDIMENT CONTROL
CERTIFICATION QUESTIONS AND
ANSWERS 100% ACCURATE
The following type of material is used in the installation of silt fence and super silt fence:
a. woven slit film
b. woven monofilament
c. nonwoven
d. none of the above - ANSWER-a. woven slit film
Per the ASTM D-4355 test method, all geotextiles used in MD for erosion and sediment
control must have an ultraviolet retention strength rating of at least:
a. 70%
b. 95%
c. 60%
d. 50% - ANSWER-a. 70%
In determining a stone classification size, the stone must be a well graded mixture
where 50% of the pieces by weight are below the weight of the midsize indicated as
d50.
a. true
b. false - ANSWER-a. true
A local jurisdiction may have stricter requirements than the State for material
specifications.
a. true
b. false - ANSWER-a. true
The minimum gauge wire for use in gabion baskets is:
a. 7
b. 12
c. 15
d. 11 - ANSWER-d. 11
The best way to prevent erosion is:
a. double up the silt fence
b. install a good working sediment trap
c. minimize the disturbed area and quickly re-establish vegetative cover
d. schedule construction when rain is not forecasted - ANSWER-c. minimize the
disturbed area and quickly re-establish vegetative cover
, Topsoiling is always required when permanently stabilizing an area.
a. true
b. false - ANSWER-b. false
Mulching, in conjunction with seeding, helps:
a. protect the seed
b. retain moisture in the soil
c. prevent erosion
d. all of the above - ANSWER-d. all of the above
Asphalt binders may be as tack with mulching on sites under five acres.
a. true
b. false - ANSWER-b. false
When spreading lime and fertilize:
a. it can be broadcast along with the seed and mulch
b. should be incorporated into the top 3-5 inches of soil
c. uneven distribution is acceptable as far as it is incorporated in the top 3-5 inches of
soil
d. all of the above - ANSWER-b. should be incorporated into the top 3-5 inches of soil
Temporary seed (annual seed) and mulch is only for application of durations
__________ months or less.
a. three
b. nine
c. six
d. twelve - ANSWER-c. six
Following initial soil disturbance or re-disturbance, permanent or temporary stabilization
must be completed within __________ calendar days for all perimeter dikes, swales,
ditches, perimeter slopes, and all slopes steeper than 3:1; and __________ calendar
days for all other disturbed or graded areas on the project site not under active grading.
a. 1, 2
b. 3, 7
c. 7, 14
d. 14, 21 - ANSWER-b. 3, 7
Adequate vegetative cover requires __________ percent ground cover.
a. 50
b. 80
c. 95
d. 100 - ANSWER-c. 95
An earth dike must be stabilized within 3 days of installation.
a. true
b. false - ANSWER-a. true
CERTIFICATION QUESTIONS AND
ANSWERS 100% ACCURATE
The following type of material is used in the installation of silt fence and super silt fence:
a. woven slit film
b. woven monofilament
c. nonwoven
d. none of the above - ANSWER-a. woven slit film
Per the ASTM D-4355 test method, all geotextiles used in MD for erosion and sediment
control must have an ultraviolet retention strength rating of at least:
a. 70%
b. 95%
c. 60%
d. 50% - ANSWER-a. 70%
In determining a stone classification size, the stone must be a well graded mixture
where 50% of the pieces by weight are below the weight of the midsize indicated as
d50.
a. true
b. false - ANSWER-a. true
A local jurisdiction may have stricter requirements than the State for material
specifications.
a. true
b. false - ANSWER-a. true
The minimum gauge wire for use in gabion baskets is:
a. 7
b. 12
c. 15
d. 11 - ANSWER-d. 11
The best way to prevent erosion is:
a. double up the silt fence
b. install a good working sediment trap
c. minimize the disturbed area and quickly re-establish vegetative cover
d. schedule construction when rain is not forecasted - ANSWER-c. minimize the
disturbed area and quickly re-establish vegetative cover
, Topsoiling is always required when permanently stabilizing an area.
a. true
b. false - ANSWER-b. false
Mulching, in conjunction with seeding, helps:
a. protect the seed
b. retain moisture in the soil
c. prevent erosion
d. all of the above - ANSWER-d. all of the above
Asphalt binders may be as tack with mulching on sites under five acres.
a. true
b. false - ANSWER-b. false
When spreading lime and fertilize:
a. it can be broadcast along with the seed and mulch
b. should be incorporated into the top 3-5 inches of soil
c. uneven distribution is acceptable as far as it is incorporated in the top 3-5 inches of
soil
d. all of the above - ANSWER-b. should be incorporated into the top 3-5 inches of soil
Temporary seed (annual seed) and mulch is only for application of durations
__________ months or less.
a. three
b. nine
c. six
d. twelve - ANSWER-c. six
Following initial soil disturbance or re-disturbance, permanent or temporary stabilization
must be completed within __________ calendar days for all perimeter dikes, swales,
ditches, perimeter slopes, and all slopes steeper than 3:1; and __________ calendar
days for all other disturbed or graded areas on the project site not under active grading.
a. 1, 2
b. 3, 7
c. 7, 14
d. 14, 21 - ANSWER-b. 3, 7
Adequate vegetative cover requires __________ percent ground cover.
a. 50
b. 80
c. 95
d. 100 - ANSWER-c. 95
An earth dike must be stabilized within 3 days of installation.
a. true
b. false - ANSWER-a. true
