Erosion and Sediment Control Certification Exam |
106 Questions and Answers
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 - -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% - -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 - -a. true
-A local jurisdiction may have stricter requirements than the State for material
specifications.
a. true
b. false - -a. true
-The minimum gauge wire for use in gabion baskets is:
a. 7
b. 12
c. 15
d. 11 - -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 - -c. minimize the disturbed area and
quickly re-establish vegetative cover
-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 - -b. 3, 7
-Adequate vegetative cover requires __________ percent ground cover.
a. 50
b. 80
c. 95
d. 100 - -c. 95
-An earth dike must be stabilized within 3 days of installation.
a. true
b. false - -a. true
-A stabilized construction entrance:
a. is made up of Class I riprap or equivalent recycled concrete
b. uses nonwoven geotextile underneath the stone/recycled concrete
c. should slope toward the exterior of the site so runoff from SCE flows offsite
d. none of the above - -b. uses nonwoven geotextile underneath the stone/recycled
concrete
-Other than for a single-family home the minimum length of a stabilized construction
entrance is:
a. 25 feet
b. 30 feet
c. 50 feet
d. 60 feet - -c. 50 feet
-The discharge from a SCE washrack should not be directed toward silt fence.
a. true
b. false - -a. true
-Benching is required on a slope steeper than 2:1 if its height is greater than:
a. 20 feet
b. 30 feet
c. 45 feet
d. 50 feet - -a. 20 feet
-The primary purpose of benching or serrated slopes is to:
a. provide additional area for landscaping
b. break up the surface flow of runoff on long steep slopes
c. provide a level area for wildlife crossing
d. none of the above - -b. break up the surface flow of runoff on long steep slopes
-Temporary stabilization is not required during the winter.
a. true
106 Questions and Answers
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 - -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% - -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 - -a. true
-A local jurisdiction may have stricter requirements than the State for material
specifications.
a. true
b. false - -a. true
-The minimum gauge wire for use in gabion baskets is:
a. 7
b. 12
c. 15
d. 11 - -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 - -c. minimize the disturbed area and
quickly re-establish vegetative cover
-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 - -b. 3, 7
-Adequate vegetative cover requires __________ percent ground cover.
a. 50
b. 80
c. 95
d. 100 - -c. 95
-An earth dike must be stabilized within 3 days of installation.
a. true
b. false - -a. true
-A stabilized construction entrance:
a. is made up of Class I riprap or equivalent recycled concrete
b. uses nonwoven geotextile underneath the stone/recycled concrete
c. should slope toward the exterior of the site so runoff from SCE flows offsite
d. none of the above - -b. uses nonwoven geotextile underneath the stone/recycled
concrete
-Other than for a single-family home the minimum length of a stabilized construction
entrance is:
a. 25 feet
b. 30 feet
c. 50 feet
d. 60 feet - -c. 50 feet
-The discharge from a SCE washrack should not be directed toward silt fence.
a. true
b. false - -a. true
-Benching is required on a slope steeper than 2:1 if its height is greater than:
a. 20 feet
b. 30 feet
c. 45 feet
d. 50 feet - -a. 20 feet
-The primary purpose of benching or serrated slopes is to:
a. provide additional area for landscaping
b. break up the surface flow of runoff on long steep slopes
c. provide a level area for wildlife crossing
d. none of the above - -b. break up the surface flow of runoff on long steep slopes
-Temporary stabilization is not required during the winter.
a. true
