CE Section Quiz 05

1. Calculate the flow in a 6 ft wide x 3 ft deep, rectangular, concrete channel with a 0.5% slope.

2. A 8 ft wide by 4 ft deep rectangular channel has an obstruction that creates a 2 ft deep flow downstream. What is the velocity downstream of the obstruction?

3. Which of the following is not a typical function of a retention pond:

4. Given an average rainfall intensity is 4.5 inches per hour, a 25-acre drainage area has a peak runoff rate of ______. The drainage area is 50% paved (C = 0.85) and 50% vegetation (C = 0.10).

5. Calculate Reynold’s number for a 4” inside diameter pipe with water flowing at 1.5 ft³/sec. The absolute roughness coefficient = 8.7 x 10^-4 ft. Kinematic viscosity of water = 1.217 x 10⁻⁵ft²/s.