CEPSCI Stormwater Management and Hydrology 3

Question 1

A culvert on a construction site requires an outlet protection apron primarily to:

Accepted Answer

Dissipate energy and prevent scour at the pipe outlet

Answer

Outlet protection aprons made of riprap dissipate the high-velocity flow exiting a culvert to prevent scour erosion at the outlet and downstream channel.

Question 2

Which condition would most increase the peak discharge from a construction site?

Accepted Answer

Compacting the soil and removing vegetation

Answer

Compacting soil reduces infiltration capacity and removing vegetation eliminates interception and evapotranspiration, both of which increase the volume and rate of surface runoff.

Question 3

The water quality volume for a stormwater BMP is typically based on:

Accepted Answer

The first 0.5 to 1 inch of runoff from a storm event, which carries the highest pollutant loads

Answer

Water quality volume targets the first flush of runoff because this initial runoff carries the highest concentrations of pollutants accumulated between storm events.

Question 4

What is the purpose of riparian buffer zones in stormwater management?

Accepted Answer

To slow runoff, filter sediment and pollutants, and stabilize stream banks through vegetation

Answer

Riparian buffers use natural vegetation along waterways to slow runoff, filter pollutants and sediment, stabilize banks, and maintain water quality in adjacent streams.

Question 5

When sizing a sediment trap, the primary design parameter is:

Accepted Answer

Surface area based on the settling velocity of target sediment particles

Answer

Sediment trap surface area is designed based on the settling velocity of target sediment particles and the design flow rate, ensuring particles have sufficient residence time to settle out.

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 3