PE Geotechnical Exam: Format, Topics, and Complete Study Guide (2026)

You can read a boring log, call a soil's classification by feel, or size a spread footing in your sleep. None of that tells you how the PE Geotechnical exam distributes its 80 questions, which references NCEES puts on the screen in front of you, or where the format quietly punishes candidates who studied the wrong way. That gap — between field competence and exam-specific fluency — is where most preparation time disappears.

The goal of good geotechnical prep is not to re-read soil mechanics from scratch; it is to reach maximum retention of the exam-relevant material in the limited hours you actually have. That means studying in proportion to how NCEES weights its questions, learning the bundled references as navigation skills rather than background reading, and practicing under realistic CBT conditions until the format itself stops costing you points. This guide lays out the full picture: the exam format and question types, all 10 NCEES knowledge areas with their question counts, the design-standard bundle you get on exam day, how scoring works, what to expect from a practice exam, and a study plan built around the spec.

What the PE Geotechnical exam is

The PE Geotechnical exam is one of five discipline-specific versions of the NCEES PE Civil exam (the others are Structural, Construction, Transportation, and Water Resources & Environmental). It is delivered as a computer-based test (CBT) at Pearson VUE centers, offered year-round, with a $375 NCEES exam fee — the full cost breakdown of the PE Civil exam covers what you will spend beyond that.

The format, straight from the NCEES specification:

• 80 questions, 9 hours. The 9-hour appointment includes a tutorial and an optional scheduled break, and you work all 80 questions — there is no choice of sections.
• Closed book, electronic references. The exam is closed book; the NCEES PE Civil Reference Handbook and a set of design standards are supplied on-screen as searchable PDFs.
• Five question formats, not just multiple choice: traditional multiple choice (one correct answer of four), multiple-correct ("select all that apply"), fill-in-the-blank numeric entry, drag-and-drop ordering or matching, and point-and-click directly on a figure.
• Both unit systems. Questions appear in both SI and U.S. customary units, sometimes within the same problem set.

If you have read older forum threads about a "breadth" morning session and a "depth" afternoon session, that structure is gone. The April 2024 specification eliminated the separate breadth section: all 80 questions now follow a single Geotechnical-specific specification, and every question counts toward the same score. That specification runs through April 2027 on NCEES's standard three-year cycle. Despite what a few prep sites imply, there is no 2026 specification change — if a source claims the exam changed this year, it is wrong.

One more reality check before the topics: the geotechnical depth rewards conceptual judgment as much as calculation. A large share of questions turn on choosing the right method, the right boundary condition, or the right failure mode rather than grinding an equation — the kind of conceptual questions that quietly decide pass or fail.

The 10 knowledge areas, by question count

NCEES publishes the Geotechnical specification as ten knowledge areas, each with a question range. The ranges below are NCEES's own published figures; the examples in each area are illustrative, not exhaustive.

Site characterization and soil mechanics (16–24 questions across two areas)

Site characterization (8–12 questions) covers site-data interpretation, subsurface exploration planning, exploration and sampling techniques, in situ testing, soil and rock classification, and groundwater characterization. Soil mechanics, laboratory testing, and analysis (8–12 questions) adds phase relationships and index properties, total versus effective stress, stress/strain and strength, and permeability. Together these two areas are the foundation everything else sits on — and they carry the same combined weight as all the foundation questions. Two of our deep-dives live here: SPT and CPT correlation problems and USCS and AASHTO soil classification. Governing references include the FHWA Geotechnical Site Characterization manual (GEC 5), the Soils and Foundations reference manuals, and UFC 3-220-10 (Soil Mechanics).

Earthquake engineering and dynamic loads (5–8 questions)

Seismic site characterization, plus seismic analysis and design — liquefaction, pseudo-static methods, and earthquake loads. The signature problem here is liquefaction analysis with the simplified method, which ties cyclic stress ratio to corrected penetration resistance. The bundled references are the FHWA LRFD Seismic Analysis and Design circular (GEC 3) and ASCE 7-16 for seismic loads.

Earth structures, ground improvement, and pavement (9–14 questions)

One of the larger areas: ground improvement (grouting, soil mixing, wick drains, rigid inclusions, aggregate piers), geosynthetic applications including internal stability of MSE, slope stability evaluation and stabilization, embankments and earth dams and levees, landfills and caps, and pavement and slab-on-grade design. The most-tested slice is covered in our walkthrough of slope stability problem types you will see on exam day. Governing references include EM 1110-2-1902 (Slope Stability) and the FHWA Geotechnical Aspects of Pavements manual.

Retaining structures (10–15 questions — tied for the largest area)

This is the single biggest knowledge area on the spec, alongside deep foundations. It spans lateral earth pressure and load distribution, rigid wall analysis (CIP, gravity, external stability of MSE, soil nail, crib, bin), cantilevered, anchored, and braced wall analysis (soldier pile and lagging, sheet pile, secant and tangent pile, diaphragm walls, temporary support of excavation), cofferdams, underpinning, and ground anchors and tiebacks. The two cornerstone topics each have a dedicated guide: lateral earth pressure — Coulomb, Rankine, and at-rest, and cantilever, anchored, and MSE retaining wall design problems. NAVFAC DM-7.02 is the bundled standard that carries anchored-bulkhead and free-earth-support content.

Shallow and deep foundations (16–24 questions across two areas)

Shallow foundations (6–9 questions) covers bearing capacity and settlement, including induced stress distribution. Deep foundations (10–15 questions — tied for the largest area) covers geotechnical and structural capacity and settlement of driven piles, drilled shafts, micropiles, helical and auger-cast piles, lateral capacity and deformation, installation methods, static and dynamic load testing, and integrity testing. Both are handled in our guide to bearing capacity and pile capacity calculations; the settlement side connects to consolidation and settlement calculations. The bundled references are the FHWA Driven Pile Foundations circulars (GEC 12) and the Drilled Shafts manual (GEC 10).

Groundwater, seepage, and the supporting areas (14–21 questions across three areas)

Three smaller areas round out the spec. Groundwater and seepage (4–6 questions) covers dewatering, seepage analysis, groundwater flow, and drainage and seepage control — UFC 3-220-05 (Dewatering and Groundwater Control) governs. Construction observation, monitoring, and QA/QC and safety (6–9 questions) covers earthwork and compaction, trench and construction safety, geotechnical instrumentation, and erosion and scour protection, with trench safety drawn from 29 CFR 1926 Subpart P. Problematic soil and rock conditions (4–6 questions) covers karst, collapsible, expansive, peat, organic, and sensitive soils, reactive and corrosive soils, frost susceptibility, and rock slopes and rockfalls. None of these is large on its own, but skipping them surrenders points that are often easier than the foundation calculations.

Add it up and the pattern is clear: retaining structures and deep foundations — tied at 10–15 questions each — plus the two-area foundation and site/soil groupings put the weight of the exam squarely on structures, foundations, and the soil behavior that drives them. That is exactly where your study hours should concentrate.

Reference standards you get in the exam

The CBT workstation gives you a searchable PDF bundle. For the Geotechnical exam under the April 2024 specification, that bundle is:

Reference	What it covers on the exam
NCEES PE Civil Reference Handbook	Core equations for every area — soil mechanics, lateral earth pressure, bearing capacity, settlement, seepage, seismic
ASCE 7-16 — Minimum Design Loads (2017)	Seismic site class, design loads, environmental loads
EM 1110-2-1902 — Slope Stability (2003)	USACE slope stability methods and factors of safety
FHWA NHI-06-088 / 06-089 — Soils and Foundations, Vols I & II (2006)	Site investigation, shallow and deep foundation design, earthwork
FHWA NHI-05-037 — Geotechnical Aspects of Pavements (2006)	Subgrade characterization, pavement and slab-on-grade design
FHWA NHI-11-032 (GEC 3) — LRFD Seismic Analysis and Design	Liquefaction, seismic earth pressures, dynamic loads
FHWA NHI-16-009 / 16-010 (GEC 12) — Driven Pile Foundations (2016)	Driven pile geotechnical and structural capacity, installation
FHWA NHI-16-072 (GEC 5) — Geotechnical Site Characterization (2017)	Exploration planning, in situ testing, soil and rock characterization
FHWA NHI-18-024 (GEC 10) — Drilled Shafts (2018)	Drilled shaft design methods and construction procedures
NAVFAC DM-7.02 — Foundations & Earth Structures (1986)	Earth-retaining structures, anchored bulkheads, free-earth support
UFC 3-220-05 / 3-220-10 — Dewatering; Soil Mechanics	Dewatering and groundwater control; soil mechanics fundamentals
29 CFR Part 1926 — Construction safety (July 2020)	Excavation and trench protection (Subpart P), cranes, fall protection

One scoring detail worth internalizing: NCEES states that solutions referencing a standard are scored against this list and these revision years — solutions based on other standards or newer editions will not receive credit. If you practice seismic problems against a newer ASCE edition because it is on your office shelf, you are practicing tables you will not see on screen.

Two things candidates get wrong about this bundle. First, the references that are not there: no dedicated MSE design manual is supplied, so the FHWA MSE pullout design procedure is real engineering but not an in-exam reference — the exam tests MSE through external stability (a retaining-wall problem) and the internal-stability concepts in the geosynthetics handbook section, not a standalone design manual. Second, the CBT interface opens each design standard one chapter at a time; you cannot keyword-search across an entire manual at once. Knowing which manual and chapter holds what, before you open it, is itself a scored skill. Our guide to how the NCEES PE Civil Reference Handbook is organized covers the layout, and practicing in a split-screen setup with the free Handbook PDF from your MyNCEES account is the fastest way to build that navigation speed.

How it is scored and what passing takes

There is no fixed passing percentage. NCEES converts your raw score to a pass/fail decision against a cut score set through psychometric standard-setting, in which panels of licensed engineers rate each question's difficulty to determine the minimum score that represents competent practice. The cut score varies between exam forms so that a harder form requires fewer correct answers — which means "what percent do I need?" has no single answer, and you should not calibrate your practice scores to a guessed threshold.

You typically get your result within 7–10 days of testing. A failed attempt comes with a diagnostic report showing your relative performance by knowledge area; you can retest after a waiting period, up to NCEES's limit of one attempt per quarter and three per 12-month period.

On realism: in the most recent NCEES release (the January–June 2025 testing window, the second full cycle under the April 2024 spec), Geotechnical posted a 61% first-time pass rate and 41% for repeat takers — second-highest first-time rate among the five PE Civil disciplines, behind Water Resources & Environmental at 68% and ahead of Transportation at 55%. That is a workable number, but the repeat rate is the warning: candidates who fail and then study the same way tend to fail again. The full trend lines are in our PE Civil exam pass rates report, and the recurring habits behind repeat failures are dissected in our look at why candidates keep failing the geotechnical exam.

A study plan that covers every domain

The most common geotechnical prep failure is allocating hours by comfort instead of by question count — over-practicing the soil mechanics you remember from school while under-practicing retaining structures, deep foundations, and reference navigation, which together carry the exam. Weight your hours the way NCEES weights its questions:

• The two largest areas first. Retaining structures (10–15) and deep foundations (10–15) have the highest payoff per hour and the steepest reference-navigation learning curve (NAVFAC DM-7.02, the GEC 12 driven-pile and GEC 10 drilled-shaft circulars). Build intuition for lateral earth pressure and pile capacity until method selection is automatic.
• The soil foundation. Site characterization and soil mechanics (16–24 combined) underpin everything else — effective stress, classification, consolidation, and in situ test correlations. Our soil mechanics and foundation design study guide sequences these the way they build on each other.
• The high-yield specialties. Earth structures and ground improvement (9–14) and earthquake engineering (5–8) reward focused practice on slope stability and liquefaction rather than broad reading.
• The supporting areas. Groundwater and seepage, construction QA/QC and safety, and problematic soils (14–21 combined) are often the fastest points on the exam if you can navigate the regulation and the Handbook efficiently.
• Reference navigation as its own skill. Spend dedicated sessions opening the Handbook and the bundled FHWA and NAVFAC manuals one chapter at a time, in a split screen, until you know where each method lives before you search.

Close your preparation with full-length, timed simulation. The last phase of prep is not about new content — it is about pacing (roughly six and a half minutes per question on average) and reference discipline under a clock.

What to expect from a geotechnical practice exam

A practice exam is only useful if it mirrors the real one. A geotechnical practice exam that prepares you should: deliver 80 questions across all ten knowledge areas in the published proportions; mix all five CBT question formats, not just multiple choice; present problems in both SI and U.S. customary units; and — most important — make you solve them inside a CBT-style interface using only the bundled references, opened one chapter at a time. A PDF answer key you flip to instantly trains a skill the exam never tests; a timed, reference-disciplined simulation trains the skill it does.

That is why the PEwise PE Geotechnical exam prep course includes two NCEES-style practice exams — a 59-question focused review and an 80-question full simulation — inside a CBT simulator with a built-in calculator, the reference PDFs, a timer, a break system, and worked solutions. The point is to make exam day feel like a repeat of something you have already done, not a first encounter with the format.

How PEwise approaches the Geotechnical exam

PEwise built its complete PE Geotechnical course around the same knowledge-area weighting this guide describes, with module sequences spanning site characterization and in situ testing, soil mechanics and lab testing, shallow and deep foundations, lateral earth pressure and retaining structures, slope stability and earth structures, seismic and liquefaction analysis, groundwater and seepage, and construction monitoring and safety. The course was authored by Mahdi Bahrampouri, Ph.D., a Geotechnical Earthquake Engineer and co-founder of PEwise, and every topic is taught through short animated video lessons rather than recorded whiteboard lectures — each concept is drawn, animated, and worked through visually, so an effective-stress change or a failure surface becomes something you watch happen instead of something you decode from a static figure. That visual, retention-first approach is the whole point: 270+ animated lessons and 10+ hours of content designed so the material sticks in the study time you actually have.

Access is $149 for 3 months — against $1,000+ for the live-course providers — and it carries a pass guarantee: if you do not pass, you get another 3 months of full course access free, with no homework-completion conditions attached. If you are still deciding which civil depth to sit, our breakdown of how the five PE Civil disciplines compare can help, and our guide to mastering the CBT digital format covers the interface mechanics every discipline shares.

Final thoughts

The PE Geotechnical exam rewards a specific kind of preparation: weight your hours the way NCEES weights its questions, treat the bundled references as navigation skills rather than background reading, and concentrate on the areas that actually carry the exam — retaining structures, deep foundations, and the soil behavior beneath both. Field experience gives you judgment that newer candidates lack; pairing it with deliberate, spec-driven, retention-first practice is what converts that judgment into a passing score. And once you hold the license, the geotechnical engineering career paths it opens are worth the months of work.

Each knowledge area in this guide has a dedicated deep-dive with the specific problem types NCEES draws from it. Start with whichever area your diagnostic practice flags as weakest, and work outward from there. For the broader licensure picture beyond this one discipline, our complete guide to PE exam success ties the whole path together.