1. When excavating near a utility line, the first step a contractor should
take is:
A) Excavate immediately with caution
B) Contact the utility company to locate lines
C) Use a backhoe to dig
D) Assume the line is not active
Answer: B) Contact the utility company to locate lines
Explanation: Arizona law requires verifying the location of underground
utilities before excavation to prevent damage and ensure safety.
2. The main purpose of a subgrade in road construction is to:
A) Provide drainage
B) Support the pavement
C) Attract traffic
D) Reduce dust
Answer: B) Support the pavement
Explanation: The subgrade is the prepared surface upon which the base and
pavement are placed, providing structural support.
3. When grading a site, the term “cut” refers to:
A) Soil removed from a high spot
B) Soil added to a low spot
C) Asphalt paving
D) Trimming vegetation
Answer: A) Soil removed from a high spot
Explanation: A “cut” occurs where soil is excavated to reach the desired grade.
,4. Which type of soil is most prone to shrinkage and swelling, affecting
grading stability?
A) Sandy soil
B) Clay soil
C) Gravel
D) Rock
Answer: B) Clay soil
Explanation: Clay expands when wet and shrinks when dry, making it less
stable for grading unless properly compacted.
5. The purpose of compaction in excavation and grading is to:
A) Make the soil loose
B) Increase soil density and stability
C) Improve color of soil
D) Reduce labor
Answer: B) Increase soil density and stability
Explanation: Compaction reduces voids, increases soil strength, and prevents
future settlement.
6. Which piece of equipment is best for fine grading a level surface?
A) Bulldozer
B) Motor grader
C) Excavator
D) Dump truck
Answer: B) Motor grader
Explanation: A motor grader is designed for precise grading and shaping of
surfaces.
7. What is the main reason for using geotextiles in road construction?
A) To add color
B) Soil stabilization and separation
C) Increase friction
D) Reduce noise
,Answer: B) Soil stabilization and separation
Explanation: Geotextiles prevent mixing of subgrade and aggregate, improving
stability and drainage.
8. When preparing a slope, the safest maximum grade for workers on foot
is typically:
A) 1:1 (45°)
B) 2:1 (26.5°)
C) 3:1 (18.5°)
D) 4:1 (14°)
Answer: C) 3:1 (18.5°)
Explanation: OSHA and engineering guidelines recommend maximum slopes
of 3:1 for safety when on foot.
9. What is the main function of a crown in a road?
A) Improve aesthetics
B) Facilitate water drainage
C) Increase vehicle speed
D) Reduce asphalt usage
Answer: B) Facilitate water drainage
Explanation: Roads are often crowned (higher in the center) to allow water to
flow off the sides.
10. Before placing oil surfacing on a road, the surface must be:
A) Wet and loose
B) Dry and compacted
C) Sandy and soft
D) Rocky
Answer: B) Dry and compacted
Explanation: Oil surfacing requires a stable, dry surface to ensure proper
bonding and prevent potholes.
11. The “borrow pit” in grading refers to:
A) A location where soil is removed for fill
B) A storage area for equipment
, C) A drainage trench
D) A small pond
Answer: A) A location where soil is removed for fill
Explanation: Borrow pits provide additional material when local grading
requires more soil.
12. OSHA requires that trenches over 5 feet deep must have:
A) A ladder every 50 feet
B) Protective systems such as shoring or sloping
C) Only trained supervisors present
D) Concrete walls
Answer: B) Protective systems such as shoring or sloping
Explanation: Trenches over 5 feet must have protection to prevent cave-ins and
worker injury.
13. The primary reason for using oil surfacing (chip seal) is to:
A) Beautify the road
B) Protect underlying pavement from water and wear
C) Make the road slippery
D) Reduce grading costs
Answer: B) Protect underlying pavement from water and wear
Explanation: Oil surfacing seals the surface, reduces dust, and extends
pavement life.
14. Which factor most affects compaction equipment selection?
A) Color of soil
B) Type and moisture content of soil
C) Number of workers
D) Road width
Answer: B) Type and moisture content of soil
Explanation: Soil type and moisture determine the weight, type, and number of
passes needed for effective compaction.
take is:
A) Excavate immediately with caution
B) Contact the utility company to locate lines
C) Use a backhoe to dig
D) Assume the line is not active
Answer: B) Contact the utility company to locate lines
Explanation: Arizona law requires verifying the location of underground
utilities before excavation to prevent damage and ensure safety.
2. The main purpose of a subgrade in road construction is to:
A) Provide drainage
B) Support the pavement
C) Attract traffic
D) Reduce dust
Answer: B) Support the pavement
Explanation: The subgrade is the prepared surface upon which the base and
pavement are placed, providing structural support.
3. When grading a site, the term “cut” refers to:
A) Soil removed from a high spot
B) Soil added to a low spot
C) Asphalt paving
D) Trimming vegetation
Answer: A) Soil removed from a high spot
Explanation: A “cut” occurs where soil is excavated to reach the desired grade.
,4. Which type of soil is most prone to shrinkage and swelling, affecting
grading stability?
A) Sandy soil
B) Clay soil
C) Gravel
D) Rock
Answer: B) Clay soil
Explanation: Clay expands when wet and shrinks when dry, making it less
stable for grading unless properly compacted.
5. The purpose of compaction in excavation and grading is to:
A) Make the soil loose
B) Increase soil density and stability
C) Improve color of soil
D) Reduce labor
Answer: B) Increase soil density and stability
Explanation: Compaction reduces voids, increases soil strength, and prevents
future settlement.
6. Which piece of equipment is best for fine grading a level surface?
A) Bulldozer
B) Motor grader
C) Excavator
D) Dump truck
Answer: B) Motor grader
Explanation: A motor grader is designed for precise grading and shaping of
surfaces.
7. What is the main reason for using geotextiles in road construction?
A) To add color
B) Soil stabilization and separation
C) Increase friction
D) Reduce noise
,Answer: B) Soil stabilization and separation
Explanation: Geotextiles prevent mixing of subgrade and aggregate, improving
stability and drainage.
8. When preparing a slope, the safest maximum grade for workers on foot
is typically:
A) 1:1 (45°)
B) 2:1 (26.5°)
C) 3:1 (18.5°)
D) 4:1 (14°)
Answer: C) 3:1 (18.5°)
Explanation: OSHA and engineering guidelines recommend maximum slopes
of 3:1 for safety when on foot.
9. What is the main function of a crown in a road?
A) Improve aesthetics
B) Facilitate water drainage
C) Increase vehicle speed
D) Reduce asphalt usage
Answer: B) Facilitate water drainage
Explanation: Roads are often crowned (higher in the center) to allow water to
flow off the sides.
10. Before placing oil surfacing on a road, the surface must be:
A) Wet and loose
B) Dry and compacted
C) Sandy and soft
D) Rocky
Answer: B) Dry and compacted
Explanation: Oil surfacing requires a stable, dry surface to ensure proper
bonding and prevent potholes.
11. The “borrow pit” in grading refers to:
A) A location where soil is removed for fill
B) A storage area for equipment
, C) A drainage trench
D) A small pond
Answer: A) A location where soil is removed for fill
Explanation: Borrow pits provide additional material when local grading
requires more soil.
12. OSHA requires that trenches over 5 feet deep must have:
A) A ladder every 50 feet
B) Protective systems such as shoring or sloping
C) Only trained supervisors present
D) Concrete walls
Answer: B) Protective systems such as shoring or sloping
Explanation: Trenches over 5 feet must have protection to prevent cave-ins and
worker injury.
13. The primary reason for using oil surfacing (chip seal) is to:
A) Beautify the road
B) Protect underlying pavement from water and wear
C) Make the road slippery
D) Reduce grading costs
Answer: B) Protect underlying pavement from water and wear
Explanation: Oil surfacing seals the surface, reduces dust, and extends
pavement life.
14. Which factor most affects compaction equipment selection?
A) Color of soil
B) Type and moisture content of soil
C) Number of workers
D) Road width
Answer: B) Type and moisture content of soil
Explanation: Soil type and moisture determine the weight, type, and number of
passes needed for effective compaction.
