Erosion and Sediment Control
Certification 2025/2026 Exam Questions
and Correct Answers | New Update
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
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
3
COPYRIGHT©JOSHCLAY 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
STATEMENT. ALL RIGHTS RESERVED
, 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
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 - 🧠ANSWER ✔✔b. uses nonwoven geotextile
underneath the stone/recycled concrete
Certification 2025/2026 Exam Questions
and Correct Answers | New Update
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
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
3
COPYRIGHT©JOSHCLAY 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
STATEMENT. ALL RIGHTS RESERVED
, 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
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 - 🧠ANSWER ✔✔b. uses nonwoven geotextile
underneath the stone/recycled concrete
