CPESC ACTUAL EXAM | COMPLETE QUESTIONS WITH EXPERT
SOLUTIONS | 2026 LATEST UPDATED | GET A+
What are the 5 factors that influence erosion? - (answer)Soil erodibility, topography, vegetative
cover, season, climate (rainfall)
What influences soil erodibility? - (answer)Soil texture, structure and % of OM
How does vegetative cover influence erodibility? - (answer)Top growth reduces raindrop impact,
filters sediment and slows down runoff velocity; roots hold mass particles together
How can you decrease erodibility in relation to topography? - (answer)Increase slope roughness
What climate characteristics affect erodibility? - (answer)Rainfall intensity, duration and
frequency
Why does frequent rainfall increase erodibility? - (answer)The soil becomes saturated and no
more water can infiltrate which increases runoff volume
Why is erosion potential high in the spring if it rains? - (answer)Water can't infiltrate the frozen
subsoil which increases runoff volume
What are some ways urban development impacts erosion hazards? - (answer)Changes hydrology
(GW flow, drainage), disturbs large amounts of soil, removes plant cover
BMP considerations for clearing and grubbing? - (answer)Preserve existing vegetation; clear
only what is required for immediate construction activity
BMP considerations for mass grading? - (answer)Create principle basins, traps, barriers,
diversions and channels; temporary stabilization; manage concentrated runon and runoff (water
bars)
, BMP considerations for site access & off-hauling? - (answer)Stabilize with gravel and temporary
vegetation; limit ingress and egress points
What are the 3 stages of inlet construction? - (answer)Pipe installation, inlet construction, inlet
backfill
BMP considerations of channel construction? - (answer)Monitor weather, install grade controls,
stabilize streambanks early; consider time of year (weather) to start construction (phasing)
BMP considerations of final stabilization? - (answer)Immediately apply temp or permanent
stabilization of disturbed areas; don't allow surface area to dry out for a few days before seeding
(affects germination)
BMP considerations of vertical construction? - (answer)Protect inlets; modify plan to show new
conditions and updated measures
What would have to be updated as construction progressed on the SWPPP? - (answer)Installation
and removal dates, changes in plan designs, and changes in BMPs
When are outlet protectors used? Examples? - (answer)To control runoff; wattles, check dams
(energy dissipaters) or thick/matted veg, riprap (ground cover)
What is the RUSLE equation? - (answer)A = R K L S C P
What are the units for A in RUSLE? - (answer)Ton/ha/year
What kind of erosion does RUSLE cover? - (answer)Sheet and rill erosion only
Define soil erodibility - (answer)The ease with which soil is detached by splash during rainfall
SOLUTIONS | 2026 LATEST UPDATED | GET A+
What are the 5 factors that influence erosion? - (answer)Soil erodibility, topography, vegetative
cover, season, climate (rainfall)
What influences soil erodibility? - (answer)Soil texture, structure and % of OM
How does vegetative cover influence erodibility? - (answer)Top growth reduces raindrop impact,
filters sediment and slows down runoff velocity; roots hold mass particles together
How can you decrease erodibility in relation to topography? - (answer)Increase slope roughness
What climate characteristics affect erodibility? - (answer)Rainfall intensity, duration and
frequency
Why does frequent rainfall increase erodibility? - (answer)The soil becomes saturated and no
more water can infiltrate which increases runoff volume
Why is erosion potential high in the spring if it rains? - (answer)Water can't infiltrate the frozen
subsoil which increases runoff volume
What are some ways urban development impacts erosion hazards? - (answer)Changes hydrology
(GW flow, drainage), disturbs large amounts of soil, removes plant cover
BMP considerations for clearing and grubbing? - (answer)Preserve existing vegetation; clear
only what is required for immediate construction activity
BMP considerations for mass grading? - (answer)Create principle basins, traps, barriers,
diversions and channels; temporary stabilization; manage concentrated runon and runoff (water
bars)
, BMP considerations for site access & off-hauling? - (answer)Stabilize with gravel and temporary
vegetation; limit ingress and egress points
What are the 3 stages of inlet construction? - (answer)Pipe installation, inlet construction, inlet
backfill
BMP considerations of channel construction? - (answer)Monitor weather, install grade controls,
stabilize streambanks early; consider time of year (weather) to start construction (phasing)
BMP considerations of final stabilization? - (answer)Immediately apply temp or permanent
stabilization of disturbed areas; don't allow surface area to dry out for a few days before seeding
(affects germination)
BMP considerations of vertical construction? - (answer)Protect inlets; modify plan to show new
conditions and updated measures
What would have to be updated as construction progressed on the SWPPP? - (answer)Installation
and removal dates, changes in plan designs, and changes in BMPs
When are outlet protectors used? Examples? - (answer)To control runoff; wattles, check dams
(energy dissipaters) or thick/matted veg, riprap (ground cover)
What is the RUSLE equation? - (answer)A = R K L S C P
What are the units for A in RUSLE? - (answer)Ton/ha/year
What kind of erosion does RUSLE cover? - (answer)Sheet and rill erosion only
Define soil erodibility - (answer)The ease with which soil is detached by splash during rainfall
