CPESC BMP Selection 2

Question 1

Which BMP is most appropriate for capturing sediment-laden runoff from a disturbed area before it enters a natural waterway?

Accepted Answer

Sediment basin

Answer

A sediment basin is designed to capture and retain runoff from large disturbed areas, allowing sediment to settle before discharge to a waterway.

Question 2

When selecting a BMP for a steep slope (>15%) with high-velocity concentrated flow, which option is most suitable?

Accepted Answer

Rock-lined channel or slope drain

Answer

Rock-lined channels or slope drains convey high-velocity concentrated flow safely down steep slopes without causing erosion.

Question 3

A construction site has sandy soils with a permeability rate exceeding 1 inch per hour. Which sediment control BMP would be LEAST effective here?

Accepted Answer

Silt fence without filter fabric backing

Answer

Silt fence relies on filtration through geotextile fabric, but in highly permeable sandy soils the water bypasses the fence through the ground rather than through the fabric.

Question 4

Which factor is PRIMARY when selecting between a temporary sediment trap and a sediment basin?

Accepted Answer

Drainage area size

Answer

Drainage area size is the primary determinant; sediment traps are typically used for areas up to 5 acres while sediment basins are required for larger drainage areas.

Question 5

On a linear construction project crossing multiple watersheds, what is the best approach for BMP placement?

Accepted Answer

Place BMPs at each watershed outlet to prevent cross-watershed discharge

Answer

BMPs should be placed at each individual watershed outlet to contain sediment within its source watershed and prevent cross-contamination.

(CPESC) Certified Professional in Erosion and Sediment Control Practice Test

(CPESC) Certified Professional in Erosion and Sediment Control Practice Test

CPESC BMP Selection 2