CEPSCI Stormwater Management and Hydrology 2

Question 1

A check dam installed in a swale is primarily designed to:

Accepted Answer

Reduce flow velocity and promote sediment settling in the channel

Answer

Check dams reduce the velocity of flow in drainage channels and swales, promoting sediment deposition and reducing the channel's erosive energy.

Question 2

What is the purpose of a diversion dike on a construction site?

Accepted Answer

To redirect clean runoff away from disturbed areas or to route runoff to a BMP

Answer

Diversion dikes are earthen berms that redirect surface runoff away from disturbed areas or channel it toward a sediment control BMP to prevent uncontrolled runoff.

Question 3

Which stormwater BMP provides the most effective long-term management of runoff quality after construction is complete?

Accepted Answer

Permanent stormwater pond or bioretention area

Answer

Permanent stormwater management facilities like detention ponds or bioretention areas provide long-term water quality and quantity control after construction activities have ended.

Question 4

Sheet flow in stormwater hydrology describes:

Accepted Answer

Thin, uniform flow across a broad surface with no defined channel

Answer

Sheet flow is the thin layer of water that moves across a surface in a relatively uniform depth without concentrating into a defined channel, and it is less erosive than concentrated flow.

Question 5

A level spreader is used to:

Accepted Answer

Convert concentrated flow back to sheet flow before it enters a vegetated buffer

Answer

Level spreaders convert concentrated runoff into sheet flow so it can be dispersed across a vegetated buffer strip or filter area, reducing erosive velocity and promoting infiltration.

CEPSCI - Certified Erosion Prevention and Sediment Control Inspector Practice Test

CEPSCI - Certified Erosion Prevention and Sediment Control Inspector Practice Test

CEPSCI Stormwater Management and Hydrology 2