California Certified Engineering Geologist (CEG)
EXAM QUESTIONS AND CORRECT ANSWERS VEIFIED
ANSWERS PLUS RAIONALES 2025/2026 Q&A |
INSTANT DOWNLOAD PDF
1. Which soil type is most susceptible to liquefaction during an earthquake?
A. Clay
B. Sand
C. Silt
D. Gravel
Answer: B. Sand
Rationale: Loose, saturated sands are highly susceptible to liquefaction under seismic loading
due to their inability to resist shear stress.
2. The California Geological Survey (CGS) uses the Seismic Hazard Zone maps primarily to:
A. Determine oil drilling locations
B. Identify areas prone to liquefaction and landslides
C. Guide floodplain management
D. Plan highway construction
Answer: B. Identify areas prone to liquefaction and landslides
Rationale: CGS maps identify areas at high risk of seismic hazards, helping engineers and
planners mitigate earthquake-related risks.
3. Which method is most appropriate for determining the bearing capacity of shallow
foundations?
A. Standard Penetration Test (SPT)
B. Cone Penetration Test (CPT)
C. Plate Load Test
D. Triaxial Compression Test
,Answer: C. Plate Load Test
Rationale: Plate load tests directly measure the settlement and bearing capacity of soil under
surface foundations.
4. A soil profile consists of a dense sand overlying a soft clay layer. Which hazard is most likely
in an earthquake?
A. Landslide
B. Liquefaction in the sand layer
C. Slope creep
D. Surface fault rupture
Answer: B. Liquefaction in the sand layer
Rationale: Saturated, loose to medium dense sands are prone to liquefaction under seismic
shaking, even when overlying softer clays.
5. In California, the Alquist-Priolo Earthquake Fault Zoning Act primarily aims to:
A. Restrict development on active fault traces
B. Control flooding along rivers
C. Regulate mining operations
D. Monitor volcanic activity
Answer: A. Restrict development on active fault traces
Rationale: The Act requires geologic investigations before building near active faults to reduce
earthquake risk.
6. Which slope stabilization method is most effective for a shallow soil landslide?
A. Soil nailing
B. Retaining wall
C. Deep caissons
D. Grouting
Answer: A. Soil nailing
Rationale: Soil nailing reinforces existing slopes by inserting steel bars into the soil, effective for
shallow landslides.
, 7. The term “engineering geomorphology” refers to:
A. Study of volcanoes for hazard assessment
B. Application of geomorphology to engineering projects
C. Soil classification for agricultural purposes
D. Rock weathering studies
Answer: B. Application of geomorphology to engineering projects
Rationale: Engineering geomorphology evaluates landforms, slope stability, and terrain
suitability for construction.
8. Which laboratory test is commonly used to classify fine-grained soils?
A. Direct Shear Test
B. Atterberg Limits
C. Triaxial Compression Test
D. Standard Penetration Test
Answer: B. Atterberg Limits
Rationale: Atterberg limits (liquid and plastic limits) help classify clays and silts and assess their
engineering behavior.
9. What is the main cause of rockfall hazards in steep mountainous terrain?
A. Erosion of soil
B. Weathering and jointing in rock
C. Soil liquefaction
D. Tectonic folding
Answer: B. Weathering and jointing in rock
Rationale: Fractures and weathered rock on steep slopes are prone to detachment and rockfall
hazards.
10. In seismic hazard analysis, Peak Ground Acceleration (PGA) is used to:
A. Measure slope stability
B. Assess potential building damage
C. Evaluate groundwater contamination
D. Determine fault slip rates
EXAM QUESTIONS AND CORRECT ANSWERS VEIFIED
ANSWERS PLUS RAIONALES 2025/2026 Q&A |
INSTANT DOWNLOAD PDF
1. Which soil type is most susceptible to liquefaction during an earthquake?
A. Clay
B. Sand
C. Silt
D. Gravel
Answer: B. Sand
Rationale: Loose, saturated sands are highly susceptible to liquefaction under seismic loading
due to their inability to resist shear stress.
2. The California Geological Survey (CGS) uses the Seismic Hazard Zone maps primarily to:
A. Determine oil drilling locations
B. Identify areas prone to liquefaction and landslides
C. Guide floodplain management
D. Plan highway construction
Answer: B. Identify areas prone to liquefaction and landslides
Rationale: CGS maps identify areas at high risk of seismic hazards, helping engineers and
planners mitigate earthquake-related risks.
3. Which method is most appropriate for determining the bearing capacity of shallow
foundations?
A. Standard Penetration Test (SPT)
B. Cone Penetration Test (CPT)
C. Plate Load Test
D. Triaxial Compression Test
,Answer: C. Plate Load Test
Rationale: Plate load tests directly measure the settlement and bearing capacity of soil under
surface foundations.
4. A soil profile consists of a dense sand overlying a soft clay layer. Which hazard is most likely
in an earthquake?
A. Landslide
B. Liquefaction in the sand layer
C. Slope creep
D. Surface fault rupture
Answer: B. Liquefaction in the sand layer
Rationale: Saturated, loose to medium dense sands are prone to liquefaction under seismic
shaking, even when overlying softer clays.
5. In California, the Alquist-Priolo Earthquake Fault Zoning Act primarily aims to:
A. Restrict development on active fault traces
B. Control flooding along rivers
C. Regulate mining operations
D. Monitor volcanic activity
Answer: A. Restrict development on active fault traces
Rationale: The Act requires geologic investigations before building near active faults to reduce
earthquake risk.
6. Which slope stabilization method is most effective for a shallow soil landslide?
A. Soil nailing
B. Retaining wall
C. Deep caissons
D. Grouting
Answer: A. Soil nailing
Rationale: Soil nailing reinforces existing slopes by inserting steel bars into the soil, effective for
shallow landslides.
, 7. The term “engineering geomorphology” refers to:
A. Study of volcanoes for hazard assessment
B. Application of geomorphology to engineering projects
C. Soil classification for agricultural purposes
D. Rock weathering studies
Answer: B. Application of geomorphology to engineering projects
Rationale: Engineering geomorphology evaluates landforms, slope stability, and terrain
suitability for construction.
8. Which laboratory test is commonly used to classify fine-grained soils?
A. Direct Shear Test
B. Atterberg Limits
C. Triaxial Compression Test
D. Standard Penetration Test
Answer: B. Atterberg Limits
Rationale: Atterberg limits (liquid and plastic limits) help classify clays and silts and assess their
engineering behavior.
9. What is the main cause of rockfall hazards in steep mountainous terrain?
A. Erosion of soil
B. Weathering and jointing in rock
C. Soil liquefaction
D. Tectonic folding
Answer: B. Weathering and jointing in rock
Rationale: Fractures and weathered rock on steep slopes are prone to detachment and rockfall
hazards.
10. In seismic hazard analysis, Peak Ground Acceleration (PGA) is used to:
A. Measure slope stability
B. Assess potential building damage
C. Evaluate groundwater contamination
D. Determine fault slip rates
