California Certified Engineering Geologist Exam Test Questions And Correct Answers (Verified) Latest Update 2026/2027 | Graded A+ | Guaranteed Pass.

California Certified Engineering Geologist Exam Test Questions And Correct Answers (Verified) Latest Update 2026/2027 | Graded A+ | Guaranteed Pass. 1. Which of the following geologic hazards is most directly addressed in the Alquist-Priolo Earthquake Fault Zoning Act? A. Landslides B. Liquefaction C. Surface fault rupture D. Ground subsidence The Alquist-Priolo Act focuses specifically on mitigating the hazard of surface fault rupture near active faults. 2. What is the primary geologic feature used to define an "active fault" in California? A. A fault that shows any offset B. A fault with surface displacement in the last 11,700 years C. A fault that has caused a historical earthquake D. A fault mapped on a geologic map According to California Geological Survey, an active fault is one with surface displacement during the Holocene (last ~11,700 years). 3. Which investigation technique is most appropriate to determine the depth of bedrock in an alluvial basin? A. Geologic mapping B. Seismic refraction survey C. Surface trenching D. Cone penetration testing Seismic refraction is effective for determining the depth to higher velocity materials like bedrock. 5. What does a Factor of Safety (FoS) of 1.0 indicate in slope stability analysis? A. The slope is safe B. The slope will never fail C. The slope is at the point of failure D. The slope is over-designed A Factor of Safety of 1.0 means that driving and resisting forces are equal— indicating failure is imminent. 6. In California, which state agency provides official Earthquake Zones of Required Investigation? A. Cal EPA B. California Geological Survey (CGS) C. California Building Standards Commission D. Office of Emergency Services CGS releases these zones to guide geologic hazard studies before development. 7. What type of fault movement is characterized by vertical displacement? A. Strike-slip B. Oblique-slip C. Dip-slip D. Transform Dip-slip faults show vertical movement, either normal or reverse. 8. Which of the following is the best field method for identifying a landslide deposit? A. Use of GPS B. Observation of hummocky topography and disturbed vegetation C. Groundwater sampling D. Seismic survey Hummocky terrain and tilted or stressed trees are typical visual indicators of landslide activity. 9. What is the typical range of SPT (Standard Penetration Test) blow counts indicating loose granular soils? A. 0–10 B. 10–20 C. 20–30 D. 30 SPT blow counts of 0–10 typically indicate loose granular materials susceptible to settlement. 10. What geologic structure typically results from compressive tectonic forces? A. Anticline B. Normal fault C. Graben D. Horst Anticlines form due to compression and are upward-arching folds. 11. In slope stability analysis, which parameter primarily affects shear strength? A. Porosity B. Angle of internal friction C. Plasticity index D. Saturation The angle of internal friction directly influences the shear strength in MohrCoulomb failure theory. 4. Which of the following is a common trigger mechanism for landslides in California? A. Intense or prolonged rainfall B. Wildfires alone C. Wind erosion D. Droughts Rainfall increases pore pressure and reduces shear strength, commonly triggering slope failure. 12. What is a key indicator of potential liquefaction during a site investigation? A. High organic content B. Clayey soils C. Loose, saturated, clean sands D. Highly plastic clays Liquefaction typically occurs in loose, saturated, clean sands during strong shaking. 13. What is the role of trenching across a fault trace? A. To collect soil samples B. To install instrumentation C. To identify past surface ruptures D. To assess groundwater conditions Trenching allows geologists to examine faulting evidence and date past seismic events