PE Exam Practice Problem #45: Water Resources | IDF Curve - Rational Method - Peak Runoff

Welcome to SolvedIn6: Free practice problems for the Professional Engineering Exam! Each question is styled after those created by the NCEES, and is usually solved in under 6 minutes, which is the average time you will have to solve each question on the Professional Engineering Exam.
In this problem, we are asked to use the Rational Method to find the peak runoff from a 10-acre area consisting of mostly apartments. This can be done in the following manner:
Step 1: Look up the equation for the Rational Method.
Step 2: Find the area given in the problem statement.
Step 3: Use the intensity-duration-frequency curve provided to find the intensity on the Y axis from the 20 min duration on the X axis which was given in the problem statement.
Step 4: Look up the runoff coefficient for a “residential area” using the context clue of the area being “mostly apartments”.
Step 5: Calculate the Rational Method.
If you would like more Water Resources practice problems, please check out the rest of the playlist which this video is part of.
Please note that newer versions of the reference manual may have been released since this video was recorded. The search terms are usually still correct, but the page numbers listed in the video will be different.