Chartered Geologist (Cgeol) Practice Exam
1. What is the fundamental repeating unit that defines a mineral’s crystal structure?
A) Lattice point B) Unit cell C) Crystal grain D) Mineral facet
Correct Answer: B
Explanation: The unit cell is the smallest structural unit of a crystal that, when repeated, forms the
entire crystal lattice.
2. Which property is most directly related to a mineral’s internal atomic arrangement?
A) Color B) Cleavage C) Crystal structure D) Specific gravity
Correct Answer: C
Explanation: The internal atomic arrangement, or crystal structure, determines many of the mineral’s
physical properties.
3. What term describes a mineral’s ability to break along flat surfaces?
A) Hardness B) Fracture C) Cleavage D) Tenacity
Correct Answer: C
Explanation: Cleavage refers to the tendency of a mineral to break along specific planes of weakness in
its crystal lattice.
4. Which of the following is NOT a common rock-forming mineral?
A) Quartz B) Feldspar C) Calcite D) Graphite
Correct Answer: D
Explanation: Graphite is not typically considered a rock-forming mineral, unlike quartz, feldspar, and
calcite which are common in many rocks.
5. What classification is used for rocks based on their formation process?
A) Organic, Inorganic, and Synthetic
B) Sedimentary, Igneous, and Metamorphic C) Primary, Secondary, and Tertiary
D) Crystalline, Amorphous, and Polycrystalline
Correct Answer: B
Explanation: Rocks are classified as sedimentary, igneous, or metamorphic according to their formation
process.
6. Which igneous rock is typically coarse-grained due to slow cooling?
A) Basalt B) Granite C) Rhyolite D) Obsidian
Correct Answer: B
Explanation: Granite cools slowly underground, allowing large crystals to form, resulting in a coarse-
grained texture.
7. What process is primarily responsible for the formation of sedimentary rocks?
A) Magma cooling B) Lithification of sediments C) Metamorphism D) Crystal accumulation
Correct Answer: B
Explanation: Sedimentary rocks form by the deposition and lithification (compaction and cementation)
of sediments.
,8. Which rock type undergoes physical and chemical changes due to heat and pressure?
A) Sedimentary B) Igneous C) Metamorphic D) Extrusive
Correct Answer: C
Explanation: Metamorphic rocks are formed when existing rocks are transformed by heat, pressure, or
chemically active fluids.
9. What is the term for the continuous transformation of rock types in the Earth’s crust?
A) Rock cycle B) Plate tectonics C) Mineral weathering D) Crystallization
Correct Answer: A
Explanation: The rock cycle describes the process by which rocks are continuously transformed among
igneous, sedimentary, and metamorphic types.
10. Which geological process is mainly responsible for the recycling of crustal materials?
A) Erosion B) Weathering C) Plate tectonics D) Deposition
Correct Answer: C
Explanation: Plate tectonics drives the recycling of crustal materials through processes such as
subduction and continental collision.
11. Which scale is commonly used to measure the hardness of minerals?
A) Mohs scale B) Richter scale C) Beaufort scale D) Celsius scale
Correct Answer: A
Explanation: The Mohs scale is used to measure the relative hardness of minerals.
12. What property of a mineral is defined by its resistance to scratching?
A) Toughness B) Hardness C) Luster D) Density
Correct Answer: B
Explanation: Hardness is defined by a mineral’s ability to resist being scratched by other materials.
13. Which factor is most important in determining a mineral’s specific gravity?
A) Atomic weight and crystal structure B) Color and luster C) Hardness and cleavage D) Grain size
and porosity
Correct Answer: A
Explanation: Specific gravity depends on the atomic weight of the elements and how they are arranged
in the crystal structure.
14. What method is typically used to identify rock-forming minerals in the field?
A) X-ray diffraction B) Optical microscopy C) Hand lens examination D) Electron microprobe analysis
Correct Answer: C
Explanation: A hand lens is a common, quick tool for examining mineral properties in the field.
15. Which mineral is most commonly associated with felsic igneous rocks?
A) Olivine B) Pyroxene C) Feldspar D) Amphibole
Correct Answer: C
Explanation: Feldspar is abundant in felsic igneous rocks such as granite.
16. Which process describes the conversion of sediment into sedimentary rock?
A) Metamorphism B) Lithification C) Diagenesis D) Crystallization
,Correct Answer: B
Explanation: Lithification is the process that compacts and cements sediments into solid rock.
17. What type of rock is formed by the rapid cooling of lava at the Earth’s surface?
A) Granite B) Basalt C) Gabbro D) Schist
Correct Answer: B
Explanation: Basalt is an extrusive igneous rock that forms from rapid cooling of lava on the surface.
18. Which characteristic is most useful in distinguishing between igneous and sedimentary rocks?
A) Color B) Texture C) Luster D) Specific gravity
Correct Answer: B
Explanation: Texture, including grain size and arrangement, helps differentiate igneous from
sedimentary rocks.
19. Which term best describes the alignment of mineral grains under pressure in metamorphic rocks?
A) Foliation B) Stratification C) Segregation D) Crystallization
Correct Answer: A
Explanation: Foliation is the alignment of mineral grains, a common feature in metamorphic rocks due
to directed pressure.
20. What role does metamorphism play in the rock cycle?
A) It forms new minerals from sediments. B) It transforms existing rock types through heat and
pressure. C) It directly creates igneous rocks. D) It deposits layers of sediment.
Correct Answer: B
Explanation: Metamorphism transforms pre-existing rocks into metamorphic rocks through heat,
pressure, and chemical processes.
21. Which soil classification system is widely used in geotechnical engineering?
A) USDA Soil Taxonomy B) AASHTO Soil Classification C) Mohs Scale D) IUGS Classification
Correct Answer: B
Explanation: The AASHTO soil classification system is commonly used in geotechnical engineering for
assessing soil behavior.
22. What property primarily influences soil permeability?
A) Organic content B) Grain size distribution C) Color D) pH level
Correct Answer: B
Explanation: Soil permeability largely depends on grain size distribution, affecting how easily fluids pass
through.
23. Which process is essential for the formation of soil from parent rock?
A) Erosion B) Weathering C) Sedimentation D) Compaction
Correct Answer: B
Explanation: Weathering is the process that breaks down rocks into smaller particles, forming soil.
24. Which term describes the measure of a soil’s resistance to deformation under load?
A) Shear strength B) Permeability C) Porosity D) Plasticity
Correct Answer: A
Explanation: Shear strength indicates how much stress a soil can withstand before failing.
, 25. What is the primary purpose of geotechnical investigation methods in construction?
A) To locate mineral deposits B) To evaluate soil properties for stability C) To measure atmospheric
conditions D) To determine water quality
Correct Answer: B
Explanation: Geotechnical investigations assess soil properties to ensure the stability and safety of
construction projects.
26. Which soil compaction principle is most critical for ensuring foundation stability?
A) Increasing soil moisture content to optimum levels B) Reducing the soil temperature C) Enhancing
soil color uniformity D) Maximizing organic matter content
Correct Answer: A
Explanation: Achieving optimum moisture content is essential for effective soil compaction and
foundation stability.
27. What technique is commonly used to assess the compaction quality of soils on a construction site?
A) Proctor test B) Triaxial test C) Atterberg limits D) Sieve analysis
Correct Answer: A
Explanation: The Proctor test determines the optimal moisture content and maximum dry density for
soil compaction.
28. Which factor does NOT directly affect soil permeability?
A) Particle size B) Pore connectivity C) Mineral hardness D) Soil structure
Correct Answer: C
Explanation: Mineral hardness does not directly affect permeability; factors like particle size, pore
connectivity, and soil structure are more influential.
29. In soil classification, what does the term “plasticity” refer to?
A) The soil’s ability to change color B) The soil’s resistance to compaction C) The soil’s capacity to
deform without cracking D) The soil’s permeability
Correct Answer: C
Explanation: Plasticity is a measure of a soil’s ability to undergo deformation without cracking or
breaking.
30. Which geotechnical property is most important for assessing slope stability?
A) Cohesion B) Luster C) Grain density D) Moisture retention
Correct Answer: A
Explanation: Cohesion, along with friction angle, plays a critical role in determining the stability of
slopes.
31. What geological feature is characteristic of the Scottish Highlands?
A) Extensive sedimentary basins B) Metamorphic rock outcrops C) Volcanic calderas D) Large coral
reefs
Correct Answer: B
Explanation: The Scottish Highlands are known for their ancient metamorphic rocks and rugged terrain.
32. Which term best describes the layered arrangement of sedimentary rocks in the UK?
A) Foliation B) Stratification C) Crystallization D) Laminations
1. What is the fundamental repeating unit that defines a mineral’s crystal structure?
A) Lattice point B) Unit cell C) Crystal grain D) Mineral facet
Correct Answer: B
Explanation: The unit cell is the smallest structural unit of a crystal that, when repeated, forms the
entire crystal lattice.
2. Which property is most directly related to a mineral’s internal atomic arrangement?
A) Color B) Cleavage C) Crystal structure D) Specific gravity
Correct Answer: C
Explanation: The internal atomic arrangement, or crystal structure, determines many of the mineral’s
physical properties.
3. What term describes a mineral’s ability to break along flat surfaces?
A) Hardness B) Fracture C) Cleavage D) Tenacity
Correct Answer: C
Explanation: Cleavage refers to the tendency of a mineral to break along specific planes of weakness in
its crystal lattice.
4. Which of the following is NOT a common rock-forming mineral?
A) Quartz B) Feldspar C) Calcite D) Graphite
Correct Answer: D
Explanation: Graphite is not typically considered a rock-forming mineral, unlike quartz, feldspar, and
calcite which are common in many rocks.
5. What classification is used for rocks based on their formation process?
A) Organic, Inorganic, and Synthetic
B) Sedimentary, Igneous, and Metamorphic C) Primary, Secondary, and Tertiary
D) Crystalline, Amorphous, and Polycrystalline
Correct Answer: B
Explanation: Rocks are classified as sedimentary, igneous, or metamorphic according to their formation
process.
6. Which igneous rock is typically coarse-grained due to slow cooling?
A) Basalt B) Granite C) Rhyolite D) Obsidian
Correct Answer: B
Explanation: Granite cools slowly underground, allowing large crystals to form, resulting in a coarse-
grained texture.
7. What process is primarily responsible for the formation of sedimentary rocks?
A) Magma cooling B) Lithification of sediments C) Metamorphism D) Crystal accumulation
Correct Answer: B
Explanation: Sedimentary rocks form by the deposition and lithification (compaction and cementation)
of sediments.
,8. Which rock type undergoes physical and chemical changes due to heat and pressure?
A) Sedimentary B) Igneous C) Metamorphic D) Extrusive
Correct Answer: C
Explanation: Metamorphic rocks are formed when existing rocks are transformed by heat, pressure, or
chemically active fluids.
9. What is the term for the continuous transformation of rock types in the Earth’s crust?
A) Rock cycle B) Plate tectonics C) Mineral weathering D) Crystallization
Correct Answer: A
Explanation: The rock cycle describes the process by which rocks are continuously transformed among
igneous, sedimentary, and metamorphic types.
10. Which geological process is mainly responsible for the recycling of crustal materials?
A) Erosion B) Weathering C) Plate tectonics D) Deposition
Correct Answer: C
Explanation: Plate tectonics drives the recycling of crustal materials through processes such as
subduction and continental collision.
11. Which scale is commonly used to measure the hardness of minerals?
A) Mohs scale B) Richter scale C) Beaufort scale D) Celsius scale
Correct Answer: A
Explanation: The Mohs scale is used to measure the relative hardness of minerals.
12. What property of a mineral is defined by its resistance to scratching?
A) Toughness B) Hardness C) Luster D) Density
Correct Answer: B
Explanation: Hardness is defined by a mineral’s ability to resist being scratched by other materials.
13. Which factor is most important in determining a mineral’s specific gravity?
A) Atomic weight and crystal structure B) Color and luster C) Hardness and cleavage D) Grain size
and porosity
Correct Answer: A
Explanation: Specific gravity depends on the atomic weight of the elements and how they are arranged
in the crystal structure.
14. What method is typically used to identify rock-forming minerals in the field?
A) X-ray diffraction B) Optical microscopy C) Hand lens examination D) Electron microprobe analysis
Correct Answer: C
Explanation: A hand lens is a common, quick tool for examining mineral properties in the field.
15. Which mineral is most commonly associated with felsic igneous rocks?
A) Olivine B) Pyroxene C) Feldspar D) Amphibole
Correct Answer: C
Explanation: Feldspar is abundant in felsic igneous rocks such as granite.
16. Which process describes the conversion of sediment into sedimentary rock?
A) Metamorphism B) Lithification C) Diagenesis D) Crystallization
,Correct Answer: B
Explanation: Lithification is the process that compacts and cements sediments into solid rock.
17. What type of rock is formed by the rapid cooling of lava at the Earth’s surface?
A) Granite B) Basalt C) Gabbro D) Schist
Correct Answer: B
Explanation: Basalt is an extrusive igneous rock that forms from rapid cooling of lava on the surface.
18. Which characteristic is most useful in distinguishing between igneous and sedimentary rocks?
A) Color B) Texture C) Luster D) Specific gravity
Correct Answer: B
Explanation: Texture, including grain size and arrangement, helps differentiate igneous from
sedimentary rocks.
19. Which term best describes the alignment of mineral grains under pressure in metamorphic rocks?
A) Foliation B) Stratification C) Segregation D) Crystallization
Correct Answer: A
Explanation: Foliation is the alignment of mineral grains, a common feature in metamorphic rocks due
to directed pressure.
20. What role does metamorphism play in the rock cycle?
A) It forms new minerals from sediments. B) It transforms existing rock types through heat and
pressure. C) It directly creates igneous rocks. D) It deposits layers of sediment.
Correct Answer: B
Explanation: Metamorphism transforms pre-existing rocks into metamorphic rocks through heat,
pressure, and chemical processes.
21. Which soil classification system is widely used in geotechnical engineering?
A) USDA Soil Taxonomy B) AASHTO Soil Classification C) Mohs Scale D) IUGS Classification
Correct Answer: B
Explanation: The AASHTO soil classification system is commonly used in geotechnical engineering for
assessing soil behavior.
22. What property primarily influences soil permeability?
A) Organic content B) Grain size distribution C) Color D) pH level
Correct Answer: B
Explanation: Soil permeability largely depends on grain size distribution, affecting how easily fluids pass
through.
23. Which process is essential for the formation of soil from parent rock?
A) Erosion B) Weathering C) Sedimentation D) Compaction
Correct Answer: B
Explanation: Weathering is the process that breaks down rocks into smaller particles, forming soil.
24. Which term describes the measure of a soil’s resistance to deformation under load?
A) Shear strength B) Permeability C) Porosity D) Plasticity
Correct Answer: A
Explanation: Shear strength indicates how much stress a soil can withstand before failing.
, 25. What is the primary purpose of geotechnical investigation methods in construction?
A) To locate mineral deposits B) To evaluate soil properties for stability C) To measure atmospheric
conditions D) To determine water quality
Correct Answer: B
Explanation: Geotechnical investigations assess soil properties to ensure the stability and safety of
construction projects.
26. Which soil compaction principle is most critical for ensuring foundation stability?
A) Increasing soil moisture content to optimum levels B) Reducing the soil temperature C) Enhancing
soil color uniformity D) Maximizing organic matter content
Correct Answer: A
Explanation: Achieving optimum moisture content is essential for effective soil compaction and
foundation stability.
27. What technique is commonly used to assess the compaction quality of soils on a construction site?
A) Proctor test B) Triaxial test C) Atterberg limits D) Sieve analysis
Correct Answer: A
Explanation: The Proctor test determines the optimal moisture content and maximum dry density for
soil compaction.
28. Which factor does NOT directly affect soil permeability?
A) Particle size B) Pore connectivity C) Mineral hardness D) Soil structure
Correct Answer: C
Explanation: Mineral hardness does not directly affect permeability; factors like particle size, pore
connectivity, and soil structure are more influential.
29. In soil classification, what does the term “plasticity” refer to?
A) The soil’s ability to change color B) The soil’s resistance to compaction C) The soil’s capacity to
deform without cracking D) The soil’s permeability
Correct Answer: C
Explanation: Plasticity is a measure of a soil’s ability to undergo deformation without cracking or
breaking.
30. Which geotechnical property is most important for assessing slope stability?
A) Cohesion B) Luster C) Grain density D) Moisture retention
Correct Answer: A
Explanation: Cohesion, along with friction angle, plays a critical role in determining the stability of
slopes.
31. What geological feature is characteristic of the Scottish Highlands?
A) Extensive sedimentary basins B) Metamorphic rock outcrops C) Volcanic calderas D) Large coral
reefs
Correct Answer: B
Explanation: The Scottish Highlands are known for their ancient metamorphic rocks and rugged terrain.
32. Which term best describes the layered arrangement of sedimentary rocks in the UK?
A) Foliation B) Stratification C) Crystallization D) Laminations
