CEPSCI Stormwater Management and Hydrology 1

Question 1

The rational method formula Q = CiA is used to calculate:

Accepted Answer

Peak stormwater runoff rate

Answer

The rational method calculates peak runoff rate (Q) using the runoff coefficient (C), rainfall intensity (i), and drainage area (A).

Question 2

A peak discharge from a construction site is most critical because:

Accepted Answer

It represents the highest flow rate BMPs must handle without failure

Answer

Peak discharge is the maximum flow rate during a storm event, and BMPs must be designed to handle this flow without being overwhelmed or failing.

Question 3

Which factor in the rational method accounts for the type of ground surface?

Accepted Answer

C (runoff coefficient)

Answer

The runoff coefficient (C) represents the fraction of rainfall that becomes runoff, which varies based on ground cover type, soil type, and slope.

Question 4

What is the design storm typically used for sizing temporary sediment basins?

Accepted Answer

2-year or 10-year storm depending on jurisdiction

Answer

Many jurisdictions require temporary sediment basins to be sized for the 2-year or 10-year design storm, though specific requirements vary by state and local regulations.

Question 5

Time of concentration in hydrology refers to:

Accepted Answer

The time for runoff to travel from the most remote point in a watershed to the outlet

Answer

Time of concentration is the time it takes for runoff from the hydraulically most distant point in a drainage area to reach the outlet, which affects peak discharge calculations.

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 1