CALIFORNIA CERTIFIED ENGINEERING GEOLOGIST EXAM – QUESTIONS AND
ANSWERS | VERIFIED AND WELL DETAILED ANSWERS | PLUS RATIONALES |
GUARANTEED PASS | LATEST EXAM UPDATE
CORE DOMAINS
Engineering Geology Principles and Practice
Site Investigation and Subsurface Exploration
Geotechnical Analysis and Engineering Properties of Soils and Rock
Groundwater Hydrology and Seepage
Seismic Hazard Analysis and Engineering Seismology
Slope Stability and Landslide Assessment
Geological Hazards and Risk Mitigation
California Building Code and Regulatory Compliance
Professional Ethics and Legal Standards
Environmental Geology and Contaminant Hydrogeology
INTRODUCTION
This comprehensive examination is designed to assess the candidate's mastery of
core principles, applied skills, and professional judgment required for the practice of
engineering geology in California. The exam evaluates foundational theory, field
and laboratory techniques, regulatory frameworks, and ethical decision-making
through a combination of multiple-choice questions and scenario-based problems.
Candidates are expected to demonstrate their ability to integrate geological
knowledge with engineering practice, analyze complex site conditions, and make
defensible recommendations for hazard mitigation and infrastructure development.
Emphasis is placed on real-world application and the critical thinking necessary to
navigate the diverse and challenging geological environments of California.
SECTION ONE: QUESTIONS 1 – 100
,Question 1
Which of the following is the primary factor controlling the shear strength of an
overconsolidated clay under drained loading conditions?
A. The total normal stress
B. The effective cohesion and effective angle of internal friction
C. The pore water pressure coefficient
D. The undrained shear strength
🟢 Correct answer: B
🔴 Explanation: The shear strength of overconsolidated clays is governed by the
effective stress parameters, specifically effective cohesion and the effective angle
of internal friction, as described by the Mohr-Coulomb failure criterion. Total
stress and pore pressure are secondary factors when drainage occurs.
Question 2
In the context of California's seismic hazard mapping, the term "liquefaction
susceptibility" is best defined as:
A. The likelihood of a soil deposit to flow like a liquid when subjected to static
loading
B. The potential for saturated, loose granular soils to lose strength and stiffness
during cyclic loading
C. The measure of a soil's capacity to dissipate excess pore water pressure
D. The percentage of fines in a soil that determines its drainage characteristics
🟢 Correct answer: B
🔴 Explanation: Liquefaction susceptibility refers to the inherent potential of
water-saturated, poorly drained granular soils, such as loose sands and silts, to
undergo a substantial loss of shear strength due to the buildup of excess pore
water pressure during earthquake shaking.
Question 3
,A geologist is asked to review a site where a cut slope failed after a heavy
rainstorm. The failure surface is planar and appears to follow a pre-existing
bedding plane. Which of the following types of slope failure is most likely?
A. Rotational slump
B. Translational slide
C. Rockfall
D. Soil creep
🟢 Correct answer: B
🔴 Explanation: A translational slide involves the movement of a soil or rock mass
along a relatively planar surface, often a bedding plane, joint, or fault surface. The
description provided aligns with this mechanism, as opposed to the curved failure
surface of a rotational slump.
Question 4
According to the California Building Code (CBC), what minimum factor of safety is
generally required for slope stability analyses for permanent structures, assuming
the static case with no seismic loading?
A. 1.0
B. 1.25
C. 1.5
D. 2.0
🟢 Correct answer: C
🔴 Explanation: The CBC typically requires a minimum factor of safety of 1.5 for
static slope stability analyses, though it can be higher (e.g., 1.1 to 1.2 for seismic
cases) depending on the site conditions and risk category. This value is commonly
recognized in California geotechnical engineering practice.
Question 5
Which test is most appropriate to determine the permeability of a silty clay layer
in the field?
, A. Constant head permeameter test
B. Falling head permeameter test
C. Pumping test
D. Standard Penetration Test (SPT)
🟢 Correct answer: B
🔴 Explanation: The falling head permeameter test is suitable for fine-grained
soils like silty clay, where the flow rate is low. The constant head test is for coarse-
grained soils. Pumping tests are for large-scale aquifer characteristics, not single
layer permeability. SPT measures resistance to penetration, not permeability.
Question 6
A soil sample is taken from a site with a high water table. The geologist is asked
to recommend the most appropriate method for a deep excavation requiring
dewatering. Which method is least likely to cause ground settlement?
A. Wellpoints
B. Deepwells
C. Ejector wells
D. Cutoff walls
🟢 Correct answer: D
🔴 Explanation: Cutoff walls, such as slurry walls or secant pile walls, physically
block groundwater flow into the excavation area, minimizing the change in
effective stress within the surrounding soil. Wellpoints, deepwells, and ejector
wells all involve lowering the water table, which can cause consolidation and
ground settlement.
Question 7
What is the principal difference between a Normal Fault and a Thrust Fault?
A. The angle of the fault plane and direction of hanging-wall movement
B. The presence of tectonic foliation
ANSWERS | VERIFIED AND WELL DETAILED ANSWERS | PLUS RATIONALES |
GUARANTEED PASS | LATEST EXAM UPDATE
CORE DOMAINS
Engineering Geology Principles and Practice
Site Investigation and Subsurface Exploration
Geotechnical Analysis and Engineering Properties of Soils and Rock
Groundwater Hydrology and Seepage
Seismic Hazard Analysis and Engineering Seismology
Slope Stability and Landslide Assessment
Geological Hazards and Risk Mitigation
California Building Code and Regulatory Compliance
Professional Ethics and Legal Standards
Environmental Geology and Contaminant Hydrogeology
INTRODUCTION
This comprehensive examination is designed to assess the candidate's mastery of
core principles, applied skills, and professional judgment required for the practice of
engineering geology in California. The exam evaluates foundational theory, field
and laboratory techniques, regulatory frameworks, and ethical decision-making
through a combination of multiple-choice questions and scenario-based problems.
Candidates are expected to demonstrate their ability to integrate geological
knowledge with engineering practice, analyze complex site conditions, and make
defensible recommendations for hazard mitigation and infrastructure development.
Emphasis is placed on real-world application and the critical thinking necessary to
navigate the diverse and challenging geological environments of California.
SECTION ONE: QUESTIONS 1 – 100
,Question 1
Which of the following is the primary factor controlling the shear strength of an
overconsolidated clay under drained loading conditions?
A. The total normal stress
B. The effective cohesion and effective angle of internal friction
C. The pore water pressure coefficient
D. The undrained shear strength
🟢 Correct answer: B
🔴 Explanation: The shear strength of overconsolidated clays is governed by the
effective stress parameters, specifically effective cohesion and the effective angle
of internal friction, as described by the Mohr-Coulomb failure criterion. Total
stress and pore pressure are secondary factors when drainage occurs.
Question 2
In the context of California's seismic hazard mapping, the term "liquefaction
susceptibility" is best defined as:
A. The likelihood of a soil deposit to flow like a liquid when subjected to static
loading
B. The potential for saturated, loose granular soils to lose strength and stiffness
during cyclic loading
C. The measure of a soil's capacity to dissipate excess pore water pressure
D. The percentage of fines in a soil that determines its drainage characteristics
🟢 Correct answer: B
🔴 Explanation: Liquefaction susceptibility refers to the inherent potential of
water-saturated, poorly drained granular soils, such as loose sands and silts, to
undergo a substantial loss of shear strength due to the buildup of excess pore
water pressure during earthquake shaking.
Question 3
,A geologist is asked to review a site where a cut slope failed after a heavy
rainstorm. The failure surface is planar and appears to follow a pre-existing
bedding plane. Which of the following types of slope failure is most likely?
A. Rotational slump
B. Translational slide
C. Rockfall
D. Soil creep
🟢 Correct answer: B
🔴 Explanation: A translational slide involves the movement of a soil or rock mass
along a relatively planar surface, often a bedding plane, joint, or fault surface. The
description provided aligns with this mechanism, as opposed to the curved failure
surface of a rotational slump.
Question 4
According to the California Building Code (CBC), what minimum factor of safety is
generally required for slope stability analyses for permanent structures, assuming
the static case with no seismic loading?
A. 1.0
B. 1.25
C. 1.5
D. 2.0
🟢 Correct answer: C
🔴 Explanation: The CBC typically requires a minimum factor of safety of 1.5 for
static slope stability analyses, though it can be higher (e.g., 1.1 to 1.2 for seismic
cases) depending on the site conditions and risk category. This value is commonly
recognized in California geotechnical engineering practice.
Question 5
Which test is most appropriate to determine the permeability of a silty clay layer
in the field?
, A. Constant head permeameter test
B. Falling head permeameter test
C. Pumping test
D. Standard Penetration Test (SPT)
🟢 Correct answer: B
🔴 Explanation: The falling head permeameter test is suitable for fine-grained
soils like silty clay, where the flow rate is low. The constant head test is for coarse-
grained soils. Pumping tests are for large-scale aquifer characteristics, not single
layer permeability. SPT measures resistance to penetration, not permeability.
Question 6
A soil sample is taken from a site with a high water table. The geologist is asked
to recommend the most appropriate method for a deep excavation requiring
dewatering. Which method is least likely to cause ground settlement?
A. Wellpoints
B. Deepwells
C. Ejector wells
D. Cutoff walls
🟢 Correct answer: D
🔴 Explanation: Cutoff walls, such as slurry walls or secant pile walls, physically
block groundwater flow into the excavation area, minimizing the change in
effective stress within the surrounding soil. Wellpoints, deepwells, and ejector
wells all involve lowering the water table, which can cause consolidation and
ground settlement.
Question 7
What is the principal difference between a Normal Fault and a Thrust Fault?
A. The angle of the fault plane and direction of hanging-wall movement
B. The presence of tectonic foliation
