Question 1Energy, continuity and momentum
A 0.30 m diameter water main carrying 0.09 m3/s passes through a concentric reducer into a 0.20 m diameter pipe. The mean velocity in the 0.20 m pipe is most nearly:
Prepare for the PE Civil Water Resources depth with every number worked.
Find the knowledge area to fix in a free 12-question diagnostic, repair it with a short lesson, then practice with every calculation and unit shown.
The only interactive course with a tutor that finds your weak spots and fixes them.
One payment in US dollars. Full refund within 14 days, for any reason.
Try four questions
Four knowledge areas, at the exam's level. Pick an answer to see every step of the working, units included.
Question 2Critical depth, specific energy and jumps
A rectangular channel 12.0 ft wide carries 180 cfs. Use g = 32.2 ft/s2. The critical depth is most nearly:
Question 3Runoff: rational and curve number methods
A watershed with a curve number of 78 receives a 24-hour rainfall of 4.5 in. By the NRCS curve number procedure with S = 1000/CN - 10 (in.), Ia = 0.2S and Q = (P - Ia)2 / (P - Ia + S), the direct runoff depth is most nearly:
Question 4Coagulation and flocculation
Jar tests set the dry alum dose for a 5.0 MGD plant at 30 mg/L. The alum is 100% pure as fed. The alum feed rate is most nearly:
Free tools
The twelve knowledge areas
80 questions in 8 hours of exam time, all from the Water Resources and Environmental depth. On NCEES's July 2026 figures, 71% of first-time takers passed.
Project Planning
Quantity take-off, cost estimates, CPM schedules and float, and present worth and life-cycle cost.
4 to 6 of the 80 questions
Soil Mechanics
Lateral earth pressure, consolidation and compaction, bearing capacity, settlement and slope stability.
3 to 5 of the 80 questions
Materials
Soil classification and boring logs, phase relations, permeability tests, concrete and pipe materials.
4 to 6 of the 80 questions
Analysis and Design
Mass balance, the pounds formula, hydraulic and solids loading, and weirs, flumes and meters.
6 to 9 of the 80 questions
Hydraulics: Closed Conduit
Energy and continuity, Darcy-Weisbach and Hazen-Williams, minor losses, pumps, NPSH and pipe networks.
7 to 11 of the 80 questions
Hydraulics: Open Channel
Manning's equation, critical depth, hydraulic jumps, culverts, gutters, inlets and storm sewers.
7 to 11 of the 80 questions
Hydrology
Rainfall and return periods, the rational and curve number methods, unit hydrographs and detention.
8 to 12 of the 80 questions
Groundwater and Wells
Aquifers, Darcy flow and seepage, flow nets, and steady and transient well drawdown.
4 to 6 of the 80 questions
Surface Water and Groundwater Quality
Mixing below an outfall, BOD, the DO sag, TMDLs and contaminants.
5 to 8 of the 80 questions
Drinking Water Distribution and Treatment
Demand and storage, sedimentation, coagulation, filtration, disinfection, softening and other treatment.
6 to 9 of the 80 questions
Wastewater Collection and Treatment
Flows and lift stations, primary and secondary treatment, activated sludge, nutrients and sludge handling.
7 to 11 of the 80 questions
Project Sitework
Cut and fill, surveying and layout, erosion control, curves, work zone safety and retaining walls.
9 to 14 of the 80 questions
In the course
- 14 interactive lessons
- 207 practice questions, every number and unit worked
- 1 full 80-question mock in two 4-hour halves
Guides
Civil Engineering License Prep Pro
US$499one payment
- 14 interactive lessons
- 207 practice questions with every number and unit worked
- 1 full 80-question practice exam in two 4-hour halves
Full refund within 14 days. Ask within 14 days of paying, for any reason. Our refund promise still applies after you start the course. The note under the pay button is about the separate legal right to cancel. Terms
By paying you agree to our Terms. Email us within 14 days for a full refund.
Take the free diagnostic firstApple Pay, Google Pay or card. Charged in USD.
One payment. No sales tax is added. Access until October 31, 2027.
Questions? support@unigenius.co.uk