CPESC BMP Selection 3

Question 1

Which BMP combination is most effective for a site with clay soils that generate significant turbid runoff?

Accepted Answer

Sediment basin with polyacrylamide (PAM) treatment

Answer

Clay particles are very fine and slow to settle, so combining a sediment basin with PAM flocculation dramatically improves settling efficiency.

Question 2

A BMP that redirects runoff away from a disturbed slope and discharges it to a stabilized outlet is best described as a:

Accepted Answer

Diversion BMP

Answer

Diversion BMPs such as diversion dikes or swales redirect runoff away from disturbed areas and route it to a stable outlet.

Question 3

When selecting inlet protection for a curb-opening storm drain during active construction, which factor most influences BMP type?

Accepted Answer

The expected flow rate and ponding tolerance

Answer

Expected flow rate and ponding tolerance determine whether a gravel-filled bag, filter insert, or other inlet protection is appropriate without causing flooding.

Question 4

Which stabilization BMP is most appropriate for a channel that carries intermittent high-velocity flow and cannot support vegetation immediately?

Accepted Answer

Riprap lining

Answer

Riprap provides immediate, durable protection against high-velocity flows in channels where vegetation cannot establish quickly enough.

Question 5

In a semi-arid climate with infrequent but intense rainfall, which BMP characteristic is most critical for effectiveness?

Accepted Answer

High flow capacity to handle peak runoff

Answer

In semi-arid areas, intense storms generate high peak flows, so BMPs must have sufficient capacity to handle rapid runoff without failure.

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

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

CPESC BMP Selection 3