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Key Facts: SCE PE Water Resources & Environmental Exam

32 items

Discipline Exam Format (30 MCQs + 2 Essays)

NCA Study Guide

4 hours

Discipline Examination Duration

NCA Study Guide

2,000 SAR

Total Examination Fees

SCE PE Portal

5 years

Minimum Engineering Experience

SCE PE Exam Page

60%

Passing Score Per Part

NCA Study Guide

Paper-based

Delivery Interface

SCE 2025 Guide

English

Delivery Language

SCE 2025 Guide

Professional

SCE Membership Grade

Saudi Council of Engineers

The SCE-PE Water Resources and Environmental Engineering exam is a paper-based English test administered by Qiyas (ETEC) three times annually. Candidates must hold valid SCE membership and at least five years of post-graduate experience. The discipline part contains 30 MCQs and two essays (chosen from four) in four hours, and candidates need at least 60% in both the discipline part and the common part. This resource is an independent English-language MCQ study adaptation designed for practice; it does not simulate the paper-based exam format or essay writing.

Sample SCE PE Water Resources & Environmental Practice Questions

Try these sample questions to review concepts for the SCE PE Water Resources & Environmental exam. Each question includes a detailed explanation. Start the interactive quiz above for the full 103+ question experience with AI tutoring.

1A rectangular concrete stormwater channel in Riyadh has a bottom width of 3.0 m, a uniform flow depth of 1.5 m, a bed slope of 0.0016, and a Manning roughness coefficient n = 0.015. What is the volumetric discharge rate of the channel under uniform flow conditions?
A.15.72 m³/s
B.12.00 m³/s
C.9.91 m³/s
D.7.43 m³/s
Explanation: Using Manning's equation: Q = (1/n) * A * R_h^(2/3) * S_0^(1/2). The cross-sectional flow area A = 3.0 m * 1.5 m = 4.5 m². The wetted perimeter P = 3.0 + 2(1.5) = 6.0 m. The hydraulic radius R_h = A / P = 4.5 / 6.0 = 0.75 m. R_h^(2/3) = (0.75)^(2/3) ≈ 0.8255. S_0^(1/2) = (0.0016)^(1/2) = 0.04. Substituting these values: Q = (1 / 0.015) * 4.5 * 0.8255 * 0.04 = 66.67 * 4.5 * 0.03302 ≈ 9.91 m³/s.
2A 1,000 m long ductile iron transmission pipeline with an internal diameter of 400 mm conveys water at a flow rate of 0.20 m³/s. Assuming a Darcy-Weisbach friction factor f = 0.020 and acceleration due to gravity g = 9.81 m/s², what is the frictional head loss along the pipe?
A.12.91 m
B.6.45 m
C.25.82 m
D.1.61 m
Explanation: Flow velocity V = Q / A = 0.20 / [π * (0.40 / 2)²] = 0.20 / 0.12566 ≈ 1.592 m/s. The velocity head V² / (2g) = (1.592)² / (2 * 9.81) = 2.533 / 19.62 ≈ 0.1291 m. Applying the Darcy-Weisbach equation: h_f = f * (L / D) * [V² / (2g)] = 0.020 * (1000 / 0.40) * 0.1291 = 0.020 * 2500 * 0.1291 ≈ 6.45 m.
3A booster pump at a municipal water distribution station delivers 180 m³/h of water against a total dynamic head of 45 m. If the pump efficiency is 75%, water density is 1,000 kg/m³, and g = 9.81 m/s², what is the required pump brake (shaft) power?
A.22.1 kW
B.16.6 kW
C.39.2 kW
D.29.4 kW
Explanation: First convert flow rate to m³/s: Q = 180 m³/h / 3600 s/h = 0.050 m³/s. Water power (hydraulic power) P_w = ρ * g * Q * H = 1000 kg/m³ * 9.81 m/s² * 0.050 m³/s * 45 m = 22,072.5 W = 22.07 kW. The pump brake (shaft) power required is P_brake = P_w / η = 22.07 kW / 0.75 ≈ 29.43 kW (or 29.4 kW).
4In a pressurized water pipeline of uniform cross-section flowing under steady conditions, how is the Energy Grade Line (EGL) related to the Hydraulic Grade Line (HGL)?
A.The EGL lies above the HGL by the velocity head V²/(2g), parallel to it
B.The HGL is vertically above the EGL by a distance equal to the pressure head P/γ
C.The EGL and HGL are coincident because the pipe has a constant diameter
D.The EGL lies below the HGL by a distance equal to the elevation head z
Explanation: The total energy head consists of elevation head (z), pressure head (P/γ), and velocity head (V²/(2g)). The Hydraulic Grade Line represents the sum of elevation head and pressure head (z + P/γ), which is the level to which liquid rises in a piezometer. The Energy Grade Line represents the total head (z + P/γ + V²/(2g)). Therefore, EGL is always vertically above HGL by the velocity head V²/(2g). In uniform diameter pipe, V is constant, so EGL and HGL are parallel.
5A wide rectangular open channel conveys a flow with a unit discharge (discharge per unit width) q = 2.80 m²/(s·m). Taking g = 9.81 m/s², what is the critical depth of flow in this channel?
A.0.80 m
B.1.39 m
C.0.93 m
D.0.89 m
Explanation: For a rectangular channel, critical depth occurs when the Froude number equals 1.0, giving the formula: y_c = [q² / g]^(1/3). Substituting the given values: q² = (2.80)² = 7.84 m⁴/s². Then q² / g = 7.84 / 9.81 ≈ 0.79918 m³. Taking the cube root: y_c = (0.79918)^(1/3) ≈ 0.928 m (rounded to 0.93 m).
6In open channel hydraulics, what flow regime is characterized by a Froude number less than 1.0 (Fr < 1)?
A.Supercritical flow, where gravity waves cannot propagate upstream against the current
B.Critical flow, where specific energy is at its maximum for a given discharge and the depth equals critical depth
C.Hydraulic jump flow, where rapid shallow flow abruptly becomes tranquil flow
D.Subcritical flow, where flow velocity is less than wave celerity and disturbances can travel upstream
Explanation: When Fr = V / √(g * D_h) < 1, the flow is subcritical (tranquil). In subcritical flow, the flow velocity V is less than the shallow-water wave celerity c = √(g * y). Consequently, surface disturbances and backwater effects can propagate upstream, meaning flow depth is controlled from downstream. When Fr > 1, flow is supercritical; when Fr = 1, flow is critical.
7A hydraulic jump occurs in a horizontal rectangular drainage channel. Immediately upstream of the jump, the initial flow depth y₁ = 0.50 m and the flow velocity V₁ = 6.0 m/s. Taking g = 9.81 m/s², what is the sequent (subsequent) flow depth y₂ immediately downstream of the jump?
A.0.94 m
B.1.68 m
C.2.18 m
D.3.36 m
Explanation: First calculate the upstream Froude number: Fr₁ = V₁ / √(g * y₁) = 6.0 / √(9.81 * 0.50) = 6.0 / √4.905 = 6.0 / 2.2147 ≈ 2.709. Apply the Bélanger momentum equation for a rectangular channel: y₂ / y₁ = 0.5 * [√(1 + 8 * Fr₁²) - 1]. Calculating inside the bracket: 8 * Fr₁² = 8 * (2.709)² = 8 * 7.339 ≈ 58.71. Then √(1 + 58.71) = √59.71 ≈ 7.727. Thus y₂ / y₁ = 0.5 * (7.727 - 1) = 0.5 * 6.727 = 3.364. Sequent depth y₂ = 0.50 m * 3.364 ≈ 1.68 m.
8Which set of operational conditions will significantly INCREASE the risk of cavitation in a centrifugal water supply pump?
A.Operating at elevated water temperature with excessive suction lift and a throttled suction valve
B.Increasing the suction reservoir liquid elevation and operating with a short, oversized suction pipe
C.Decreasing water temperature and installing an inducer on the pump suction impeller
D.Maintaining NPSHa at least 1.5 meters greater than NPSHr across all operating points
Explanation: Cavitation occurs when the local absolute pressure inside the pump impeller drops below the liquid's vapor pressure (P_vap), causing vapor bubbles to form and violently collapse against the metal surfaces. Net Positive Suction Head Available is given by NPSHa = (P_atm - P_vap)/γ + z_s - h_fs. Operating at higher water temperatures increases P_vap, excessive suction lift (negative z_s) lowers inlet pressure, and throttling the suction valve increases suction friction losses (h_fs). All three factors drastically decrease NPSHa below NPSHr, inducing severe cavitation.
9What is the primary theoretical limitation of using the Hazen-Williams formula for pipe friction head loss compared to the Darcy-Weisbach equation?
A.It can only be applied to non-circular conduits and open ditches
B.It assumes laminar flow throughout the entire Reynolds number range
C.It requires iterative calculation of the friction factor from the Colebrook equation for each pipe and flow
D.It is empirical, valid for water in turbulent flow at ordinary temperatures, and ignores viscosity
Explanation: The Hazen-Williams formula is empirical. It was developed for water at ordinary temperatures in turbulent pipe flow, and its roughness coefficient C does not change with Reynolds number, temperature or viscosity. The Darcy-Weisbach equation is physically based. With a friction factor from the Moody diagram or Colebrook equation (or f = 64/Re for laminar flow), it applies to any Newtonian fluid and any flow regime.
10Water flows at an initial velocity of 2.0 m/s through a long transmission pipeline with an acoustic pressure wave celerity a = 1,000 m/s and water density ρ = 1,000 kg/m³. If a downstream control valve closes instantaneously, what is the magnitude of the Joukowsky water hammer pressure surge ΔP?
A.0.2 MPa (approx. 20.4 m of head)
B.5.0 MPa (approx. 510 m of head)
C.2.0 MPa (approx. 204 m of head)
D.0.5 MPa (approx. 51 m of head)
Explanation: Under instantaneous closure (closure time t_c < 2L/a), the maximum theoretical water hammer pressure rise is governed by the Joukowsky equation: ΔP = ρ * a * ΔV. Given ρ = 1000 kg/m³, a = 1000 m/s, and ΔV = 2.0 m/s: ΔP = 1000 kg/m³ * 1000 m/s * 2.0 m/s = 2,000,000 Pa = 2.0 MPa. Expressed as pressure head: ΔH = a * ΔV / g = (1000 * 2.0) / 9.81 ≈ 203.9 m of water.

About the SCE PE Water Resources & Environmental Exam

The Saudi Council of Engineers Practice of Engineering (SCE-PE) Examination in Water Resources and Environmental Engineering is the discipline examination that water resources and environmental engineers in Saudi Arabia take to qualify for promotion to the SCE Professional Engineer grade. Administered in English on paper through the National Center for Assessment (Qiyas / ETEC), the discipline examination comprises 30 multiple-choice questions (60% weighting) and two essay responses chosen from four prompts (40% weighting) administered over four hours, alongside a separate 2.5-hour Common General Exam. This independent MCQ bank covers all 14 syllabus areas, from pipe hydraulics and hydrology to desalination, wastewater reuse and environmental compliance, with many worked calculations. It practises the MCQ section and the knowledge behind the essays, but it does not simulate the paper-based exam or the essay answers.

Exam sponsor: Saudi Council of Engineers (SCE) / National Center for Assessment (Qiyas / ETEC). The requirements and fees below concern the certification or admission exam, separate from our free practice resources.

Assessment

Specialized discipline exam: 30 MCQs and 2 essay questions (selected from 4 options) in 4 hours; separate Common General Exam: 30 MCQs and 2 essay questions in 2.5 hours

Time Limit

4 hours (discipline part); 2.5 hours (common general part)

Passing Score

60% or higher in each part (MCQ section carries 60%, essay section carries 40%)

Exam / Certification Fees

2,000 SAR total (1,000 SAR SCE application + 500 SAR per Qiyas portion)

Exam sponsor website

Fees, eligibility, and exam policies can change. Confirm them with the exam sponsor before applying or paying.

Our practice resources: topics covered

We aim to reflect publicly available exam outlines and topic information in our study resources. Coverage, format, and difficulty may differ from the actual exam, and we cannot guarantee that every detail is accurate or current. Confirm exam requirements, fees, and policies with the official exam sponsor.

10%

Fluid Mechanics, and Open Channel and Pipe Flow Hydraulics

Fluid properties, pipe network head loss, pump system curves, open channel flow Manning equation, critical depth, and hydraulic jump energy dissipation

10%

Surface and Groundwater Hydrology

Precipitation-runoff modeling, Rational method, hydrographs, flood routing, Darcy law, well drawdown equations, aquifer storage, and coastal seawater intrusion

10%

Design of Hydraulic Structures

Discharge weirs, culvert inlet and outlet control, spillways, stilling basins, earth dam seepage flow nets, piping exit gradients, and intake screens

6.7%

Water Resources Planning and Management

Water demand and peaking factors, fossil aquifers and the National Water Strategy 2030, IWRM principles, multi-criteria decisions, water tariffs, and non-revenue water

10%

Desalination Plants and Coastal Works Design and Assessment

Seawater reverse osmosis (SWRO), MSF/MED processes, energy recovery devices, membrane fouling and SDI, brine outfall diffusers, ZLD, and breakwaters

6.7%

Water Treatment, Supply and Reuse

Rapid mixing, coagulation-flocculation, rapid sand filters, disinfection C·t, breakpoint chlorination, water softening, DBPs, service storage, and DMAs

6.7%

Sewerage Management, Treatment and Reuse

Sewer self-cleansing velocity, primary clarifiers, activated sludge kinetics and MCRT, biological nutrient removal, sludge digestion, and MEWA TSE reuse criteria

6.7%

Solid and Hazardous Waste Management

Sanitary landfill volume and composite liners, leachate generation (HELP model), landfill gas management, hazardous waste characteristics (TCLP), and SAICM / Global Framework on Chemicals

6.7%

Air Quality Management

Gaussian plume dispersion modeling, effective stack height, particulate collectors (cyclones, baghouses, ESPs), Stokes law, air quality indices, and dust storms

6.7%

Environmental Planning, Monitoring and Management

NCEC project categorization, EIA process, Phase I/II ESAs, ISO 14001 EMS, CEMS protocols, water sampling methods, and environmental audits

6.7%

Environmental Risk and Performance Management Modeling

Human health risk assessment, cancer slope factors, hazard quotients and indices, Monte Carlo simulation, sustainability KPIs, LCA (ISO 14040), and GHG Protocol carbon footprints

6.7%

Feasibility Assessment and Project Management

Benefit-cost ratio and net present value, levelized cost of water, critical path scheduling, earned value metrics, fault and event tree risk identification, and BOOT/PPP delivery

3.3%

Environmental Laws, Codes and Standards

Saudi Environmental Law (Royal Decree M/165), NCEC executive regulations, Saudi Building Code SBC 701 plumbing, and ROPME/PERSGA marine conventions

3.3%

Simulation and Modeling Programs

EPANET pipe network analysis, HEC-RAS open channel and flood modeling, and MODFLOW/MT3DMS groundwater flow and contaminant transport modeling

Preparing for the SCE PE Water Resources & Environmental Exam

What You Need to Know

  • Passing score: 60% or higher in each part (MCQ section carries 60%, essay section carries 40%)
  • Assessment: Specialized discipline exam: 30 MCQs and 2 essay questions (selected from 4 options) in 4 hours; separate Common General Exam: 30 MCQs and 2 essay questions in 2.5 hours
  • Time limit: 4 hours (discipline part); 2.5 hours (common general part)
  • Exam / certification fees: 2,000 SAR total (1,000 SAR SCE application + 500 SAR per Qiyas portion) Official sources

Using Our Practice Resources

  • Work through all 103 available questions
  • Review every answer and explanation
  • Track weak areas and revisit them
  • Use our AI tutor for tough concepts

SCE PE Water Resources & Environmental: Suggested Study Strategy

1Master quantitative hydraulics calculations including Manning open channel flow, Darcy-Weisbach head loss, pump system curves, and hydraulic jump sequent depths.
2Review groundwater hydrology equations thoroughly, focusing on Darcy flux, Thiem steady radial flow, aquifer transmissivity, and Ghyben-Herzberg coastal interface depth.
3Focus on reverse osmosis desalination fundamentals: recovery rates, salt rejection, osmotic pressure, and multi-port brine outfall diffuser mechanics.
4Memorize key Saudi regulatory criteria, including MEWA Treated Sewage Effluent (TSE) parameters for unrestricted irrigation and NCEC project categorization rules.
5Review environmental management frameworks including ISO 14001 EMS cycles, Phase I/II site assessment methodologies, and Saudi Building Code SBC 701 plumbing requirements.
6Practice multi-step quantitative problems with units in SI metric system to build calculation speed and accuracy for the 4-hour examination session.

Frequently Asked Questions

What is the SCE-PE Water Resources and Environmental Engineering Exam?

The SCE Practice of Engineering (PE) Exam in Water Resources and Environmental Engineering is the specialized professional examination administered by the Saudi Council of Engineers (SCE) through Qiyas. Passing the SCE-PE is a prerequisite for upgrading SCE membership to the Professional Engineer grade, alongside SCE's other requirements.

What is the format and duration of the examination?

Per official SCE and NCA guidelines, the specialized discipline examination is a 4-hour paper-based test delivered in English containing 30 multiple-choice questions (carrying 60% of the total score) and two essay problems selected from four choices (carrying 40% of the score). Candidates must also take a separate 2.5-hour Common General Exam (30 MCQs and 2 essays). Each MCQ has four choices, NCA-approved calculators are allowed, NCA supplies all reference material, and candidates choose a test location (Riyadh, Dammam or Jeddah) when registering on the Qiyas website.

What are the eligibility requirements to register for the exam?

SCE's PE exam page and 2025 exam guide require valid SCE engineering membership and at least five years of practical post-graduate experience. After SCE approves the application and its 1,000 SAR invoice is paid, candidates register for both parts on the Qiyas website. Promotion to the Professional Engineer grade itself has a separate, longer experience requirement (SCE's PE page cites at least eight years after graduation).

What fees are required to take the SCE-PE exam?

The fee structure consists of an SCE application invoice of 1,000 SAR paid through SADAD, followed by an NCA/Qiyas invoice of 500 SAR for each exam part (500 SAR for the Common General Exam and 500 SAR for the specialized discipline exam, totaling 2,000 SAR for both parts).

What is the passing score and retake policy?

According to the NCA study guide, each part is marked out of 100 (MCQs 60%, essays 40%, with no negative marking), and candidates need at least 60% in each part. Both parts must be taken at the first sitting. A candidate who fails one part repeats only that part but must pass it within one year, or else retake both parts. A candidate who fails both parts can retake them only after one full year. SCE's general rules allow exams to be retaken multiple times.

Does this practice question bank simulate the actual exam format?

No. This practice question bank is an independent English-language MCQ study adaptation designed by OpenExamPrep to help learners practice and test core technical knowledge and calculation principles across the 14 syllabus topics. It does not simulate the official paper-based testing administration or the essay writing responses.