NM CID GF-4 Practice Questions - New Mexico CID GF-4 Drainage Or Flood Control Systems Contractor Examination Exam

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In U.S. customary units, the Rational Method peak-runoff equation used in ASCE urban stormwater design is Q = CiA. What do C, i, and A represent?

C = runoff coefficient, i = rainfall intensity in inches per hour, A = drainage area in acres C = conveyance factor, i = infiltration rate in inches per hour, A = wetted area in square feet C = channel coefficient, i = rainfall depth in inches, A = drainage area in square miles C = storage coefficient, i = time of concentration in minutes, A = impervious area in acres

Correct Answer:

C = runoff coefficient, i = rainfall intensity in inches per hour, A = drainage area in acres

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