17.1 Eighty-Question Mock Exam Plan

Purpose of the Full-Length Mock

The full-length mock is the final stress test for PE Civil Water Resources and Environmental (WRE) readiness. The current exam, effective for appointments before April 2027, is computer-based testing (CBT), closed book with searchable electronic references, and contains 80 questions delivered in two sessions of about 40 questions each. NCEES schedules a 9.5-hour appointment: a 2-minute non-disclosure agreement, an 8-minute tutorial, 8.5 hours of testing time, and one 50-minute scheduled break taken between the two sessions.

The single most important format rule to rehearse: once a session is submitted, it cannot be reopened. You cannot carry an unfinished hydraulics problem from session 1 into session 2. Your mock must enforce this so you never discover the rule on exam day.

The April 2024 specification is depth-only. Candidates work every question across all 12 WRE domains; the old morning-breadth, afternoon-depth structure is gone. A good mock therefore interleaves project planning, soils, materials, hydraulics, hydrology, water quality, drinking water, wastewater, groundwater, and sitework rather than clustering one topic.

Domain-Balanced Question Mix

Use this 80-question allocation. It stays inside the April 2024 NCEES question-count ranges while weighting the highest-volume WRE areas.

The ranges total 80 at their midpoints, so this plan is defensible. Common trap: candidates over-build hydraulics and hydrology and starve sitework, yet sitework carries the single largest range (9-14).

Two-Pass Timing Inside Each Session

Treat 6 minutes per question as the long-run average, not a target for each item. One-step unit or concept questions should take 2-4 minutes; a pump operating-point, detention-basin routing, or activated-sludge solids problem may justify 8-12 minutes once the setup is clean. The error is spending 12 minutes before confirming the setup is clean.

Run each ~40-question session with a two-pass workflow:

1. Read the final sentence first and circle the requested unit (cfs, MGD, lb/day, ft of head, mg/L).
2. Solve obvious and medium questions immediately on pass one.
3. Flag items with long data tables, multiple conversions, or uncertain assumptions.
4. Never leave a question blank before submitting a session — there is no return; choose the best-supported option.
5. After the break, reset scratch paper and start session 2 with identical discipline.

For practice, give yourself about 4 hours 15 minutes per 40-question session (8.5 hours / 2), take the full 50-minute break between them, and submit each block irrevocably. This is stricter than casual studying and reveals whether fatigue causes unit drift or skipped assumptions.

Scoring and Review Target

A raw percentage is useful only if tied to diagnosis. After the mock, build a table with columns for question number, domain, correct or incorrect, miss type, time spent, reference used, and corrective action. Separate wrong answers from slow correct answers — an 11-minute correct hydrograph problem is a scoring risk because it borrows time from later items that you never reach inside the locked session.

Readiness is not one magic number. NCEES does not publish a fixed passing percentage; the cut score is established by modified-Angoff standard setting for each new question pool and is reported to candidates only as pass or fail, never as a raw or scaled score. A practical final-week proxy is consistent performance near 70 percent or better on mixed, timed practice, with no single domain below roughly 50 percent and no repeating unit-error pattern.

Triage a weak low-volume domain such as groundwater and wells; repair a weak high-volume domain such as hydrology, hydraulics, wastewater, or sitework immediately, because those carry the points.

Two Common Full-Length Mock Failures

Beyond the score, watch for two structural failures that a casual practice session hides. First, session imbalance: candidates who do not enforce the two-session lock often pour 5 hours into the first 40 questions and then sprint the second 40 in 3.5 hours, exactly inverting the real constraint. Practice splitting your time so each ~40-question session gets close to 4 hours 15 minutes, and submit the first session before opening the second.

Second, reference dependency drift: in a relaxed setting candidates look up formulas they actually know cold, which feels harmless but adds 60 to 90 seconds per question and compounds into a full hour across 80 items. Your mock should record every handbook search so you can see whether your search rate is sustainable. If you are searching more than roughly one in three questions, your handbook habit — not your engineering knowledge — is your bottleneck, and that is a fast, high-yield repair in the final week.