Fluid Mechanics and Hydraulics

Engineering Practice Quiz: Environmental Engineering & Water Resources

October 19, 2021 by Anthony Fasano, P.E. Leave a Comment

In this article (And video above), I solve a problem related to the surface water system hydrologic budget that falls under the environmental engineering & water resources section of the FE exam, similar to what you may encounter during the exam.

Question:

A 7-acre surface area pond is located within a 520-acre watershed. Assume that the infiltration and the seepage are negligible. There is no plant biota around the pond. The watershed received 3.20 in of rainfall for the last 30-day month. The pond elevation at the beginning of the month is 520.5 ft with respect to mean sea level (MSL). By the end of the 30-day month, the pond had risen to 522.2 ft, MSL. Average stream flows into and out the pond during the month are 0.522 cfs and 0.22 cfs respectively. The amount of evaporation (in) of water that take place from the surface of the pond during the month is most nearly:

7.10
16.2
13.6
1.44

Solution:

Engineering Practice Quiz: Fluid Mechanics and Hydraulics – Fluid Dynamics

October 5, 2021 by Anthony Fasano, P.E. Leave a Comment

In this article (and video above), I solve a fluid dynamics question that would fall under the water resources and hydrology section of the FE exam, similar to what you may encounter during the exam.

Question:

A 500 mm circular pipe carries a flow of 0.28 m3/s of water under a pressure of 0.34 cm, mercury (Hg). If the pipe is laid at an elevation of 9.3 m above a reference datum, then the total head (m) with respect to the reference datum is most nearly:

9.45 m
9.37 m
9.66 m
9.71 m

Solution:

FE Exam Fluid Mechanics and Hydraulics: Steady and Unsteady Flow

September 7, 2021 by Anthony Fasano, P.E. Leave a Comment

In this article (and video above), I solve a fluid mechanics and hydraulics question, similar to what you may encounter on the FE exam.

Question:

A 8-ft wide rectangular channel carries a flow of 400 ft3/s at an initial depth of 2.1-ft before entering a jump. The sequent depth (ft) at the low velocity flow (or sub-critical) is most nearly:

4.27
3.83
5.25
7.60