CALIFORNIA CERTIFIED ENGINEERING GEOLOGIST EXAM QUESTIONS AND CORRECT ANSWERS (VERIFIED
ANSWERS) PLUS RATIONALES 2026 Q&A | INSTANT DOWNLOAD PDF
Core Domains
1. Engineering Geology Principles and Site Characterization
2. Geohazards: Seismic, Landslide, Liquefaction, and Subsidence
3. Geological Mapping, Remote Sensing, and Subsurface Exploration
4. Rock and Soil Mechanics Applied to Engineering Design
5. Hydrogeology and Groundwater Impacts on Engineered Systems
6. Regulatory Framework: CEQA, Building Codes, and Professional Practice
7. Ethics, Standard of Care, and Expert Testimony
8. Geotechnical Field and Laboratory Testing Methods
9. Infrastructure: Foundations, Tunnels, Slopes, and Earth Retaining Structures
10. Forensic Engineering Geology and Failure Investigation
Introduction
*This assessment is designed to prepare candidates for the California Certified Engineering Geologist
Examination. It evaluates mastery of engineering geology principles, site characterization, geohazard analysis,
and regulatory compliance under California-specific codes and standards. Questions blend theoretical
knowledge with applied professional scenarios, requiring critical thinking, ethical judgment, and real-world
decision-making. The 200 multiple-choice questions are divided into two sections. Each question includes a
verified correct answer and a concise rationale. This format mirrors the rigor and complexity of the actual exam,
,emphasizing practical application in seismic zones, hillside developments, groundwater management, and
forensic investigations.*
SECTION ONE: QUESTIONS 1–100
Question 1
A proposed residential development on a coastal bluff in Northern California requires an engineering geologic
report. The bluff consists of interbedded sandstone and siltstone with clay seams. Which primary geohazard
must be most thoroughly addressed?
A. Seismic liquefaction
B. Progressive landslide
C. Subsidence due to groundwater withdrawal
D. Expansive soil heave
🟢B
🔴 RATIONALE: Coastal bluffs with interbedded sedimentary rocks and clay seams are highly susceptible to
progressive, deep-seated landslides, especially under toe erosion and wet conditions. Liquefaction requires
saturated granular soils, which are not dominant here. Subsidence is less relevant. Expansive soils are a
secondary concern.
Question 2
Under the California Board for Professional Engineers, Land Surveyors, and Geologists (BPELSG), which activity is
considered the unlicensed practice of engineering geology?
,A. Preparing a geologic hazards report for a single-family home
B. Recommending a setback distance from a mapped fault
C. Classifying rock units on a site plan without calculating factors of safety
D. Designing a retaining wall drainage system based on observed seepage
🟢D
🔴 RATIONALE: Designing drainage systems is an engineering function requiring a Professional Engineer (PE)
license unless performed by a Certified Engineering Geologist (CEG) within strictly geologic scope. CEGs may
characterize hazards and recommend setbacks but not design structural elements.
Question 3
During a site investigation for a new bridge in the Sierra Nevada foothills, you encounter a foliated
metamorphic rock with visible alignment of platy minerals. Foliation is oriented steeply into the slope. The most
likely failure mode is:
A. Planar sliding along foliation
B. Toppling due to steep foliation
C. Wedge failure along joint sets
D. Circular failure in residual soil
🟢B
🔴 RATIONALE: Steeply dipping foliation into the slope (anti-dip) often leads to toppling failure, where rock
columns rotate forward. Planar sliding requires foliation dipping out of the slope. Wedge and circular failures
are less characteristic of metamorphic foliation.
Question 4
Which California regulation specifically requires a geologic hazards evaluation for new schoolsites?
, A. California Building Code (CBC) Chapter 18
B. Seismic Hazards Mapping Act of 1990
C. Alquist-Priolo Earthquake Fault Zoning Act
D. Field Act
🟢D
🔴 RATIONALE: The Field Act mandates site-specific geologic and soils investigations for public school
construction in California. Alquist-Priolo addresses fault rupture zones. Seismic Hazards Act covers liquefaction
and landslides. CBC applies generally.
Question 5
You are reviewing a geotechnical report that states a slope has a factor of safety (FS) of 1.05 under static
conditions. The slope is in a moderate seismic zone. As a CEG, your next professional action should be:
A. Approve the slope as meeting minimum standards
B. Recommend immediate mitigation because FS < 1.1
C. Request a dynamic slope stability analysis
D. Ignore because FS > 1.0 is acceptable
🟢C
🔴 RATIONALE: FS=1.05 is marginal even statically. In seismic zones, dynamic loading often reduces FS below
1.0. The standard of care requires evaluating pseudostatic or Newmark displacement analysis before approval.
Question 6
Which of the following best describes the difference between a “geologic hazard” and a “geologic constraint” in
a CEQA Initial Study?
ANSWERS) PLUS RATIONALES 2026 Q&A | INSTANT DOWNLOAD PDF
Core Domains
1. Engineering Geology Principles and Site Characterization
2. Geohazards: Seismic, Landslide, Liquefaction, and Subsidence
3. Geological Mapping, Remote Sensing, and Subsurface Exploration
4. Rock and Soil Mechanics Applied to Engineering Design
5. Hydrogeology and Groundwater Impacts on Engineered Systems
6. Regulatory Framework: CEQA, Building Codes, and Professional Practice
7. Ethics, Standard of Care, and Expert Testimony
8. Geotechnical Field and Laboratory Testing Methods
9. Infrastructure: Foundations, Tunnels, Slopes, and Earth Retaining Structures
10. Forensic Engineering Geology and Failure Investigation
Introduction
*This assessment is designed to prepare candidates for the California Certified Engineering Geologist
Examination. It evaluates mastery of engineering geology principles, site characterization, geohazard analysis,
and regulatory compliance under California-specific codes and standards. Questions blend theoretical
knowledge with applied professional scenarios, requiring critical thinking, ethical judgment, and real-world
decision-making. The 200 multiple-choice questions are divided into two sections. Each question includes a
verified correct answer and a concise rationale. This format mirrors the rigor and complexity of the actual exam,
,emphasizing practical application in seismic zones, hillside developments, groundwater management, and
forensic investigations.*
SECTION ONE: QUESTIONS 1–100
Question 1
A proposed residential development on a coastal bluff in Northern California requires an engineering geologic
report. The bluff consists of interbedded sandstone and siltstone with clay seams. Which primary geohazard
must be most thoroughly addressed?
A. Seismic liquefaction
B. Progressive landslide
C. Subsidence due to groundwater withdrawal
D. Expansive soil heave
🟢B
🔴 RATIONALE: Coastal bluffs with interbedded sedimentary rocks and clay seams are highly susceptible to
progressive, deep-seated landslides, especially under toe erosion and wet conditions. Liquefaction requires
saturated granular soils, which are not dominant here. Subsidence is less relevant. Expansive soils are a
secondary concern.
Question 2
Under the California Board for Professional Engineers, Land Surveyors, and Geologists (BPELSG), which activity is
considered the unlicensed practice of engineering geology?
,A. Preparing a geologic hazards report for a single-family home
B. Recommending a setback distance from a mapped fault
C. Classifying rock units on a site plan without calculating factors of safety
D. Designing a retaining wall drainage system based on observed seepage
🟢D
🔴 RATIONALE: Designing drainage systems is an engineering function requiring a Professional Engineer (PE)
license unless performed by a Certified Engineering Geologist (CEG) within strictly geologic scope. CEGs may
characterize hazards and recommend setbacks but not design structural elements.
Question 3
During a site investigation for a new bridge in the Sierra Nevada foothills, you encounter a foliated
metamorphic rock with visible alignment of platy minerals. Foliation is oriented steeply into the slope. The most
likely failure mode is:
A. Planar sliding along foliation
B. Toppling due to steep foliation
C. Wedge failure along joint sets
D. Circular failure in residual soil
🟢B
🔴 RATIONALE: Steeply dipping foliation into the slope (anti-dip) often leads to toppling failure, where rock
columns rotate forward. Planar sliding requires foliation dipping out of the slope. Wedge and circular failures
are less characteristic of metamorphic foliation.
Question 4
Which California regulation specifically requires a geologic hazards evaluation for new schoolsites?
, A. California Building Code (CBC) Chapter 18
B. Seismic Hazards Mapping Act of 1990
C. Alquist-Priolo Earthquake Fault Zoning Act
D. Field Act
🟢D
🔴 RATIONALE: The Field Act mandates site-specific geologic and soils investigations for public school
construction in California. Alquist-Priolo addresses fault rupture zones. Seismic Hazards Act covers liquefaction
and landslides. CBC applies generally.
Question 5
You are reviewing a geotechnical report that states a slope has a factor of safety (FS) of 1.05 under static
conditions. The slope is in a moderate seismic zone. As a CEG, your next professional action should be:
A. Approve the slope as meeting minimum standards
B. Recommend immediate mitigation because FS < 1.1
C. Request a dynamic slope stability analysis
D. Ignore because FS > 1.0 is acceptable
🟢C
🔴 RATIONALE: FS=1.05 is marginal even statically. In seismic zones, dynamic loading often reduces FS below
1.0. The standard of care requires evaluating pseudostatic or Newmark displacement analysis before approval.
Question 6
Which of the following best describes the difference between a “geologic hazard” and a “geologic constraint” in
a CEQA Initial Study?
