Kansas Highway Contractor
Examination — Local Jurisdiction
Practice Exam 2026 | 100 Questions &
Answers with Detailed Rationales |
Complete Exam Prep & Study Guide
1. During highway excavation, the contractor encounters unsuitable saturated
subgrade that cannot support the specified pavement section. What is the
most appropriate first action?
A. Place aggregate base immediately over the wet material
B. Increase asphalt thickness without approval
C. Notify the appropriate project representative and address the unsuitable
material according to the contract requirements
D. Compact the saturated material with additional passes
Answer: C. Notify the appropriate project representative and address the
unsuitable material according to the contract requirements
,Rationale: Unsuitable subgrade generally requires evaluation and an approved
corrective method such as undercutting, replacement, stabilization, or drainage
improvement.
2. A highway embankment is being constructed in controlled lifts. Why are lift
thickness and moisture content controlled?
A. To reduce surveying requirements
B. To eliminate the need for density testing
C. To achieve the required compaction and uniform structural performance
throughout the embankment
D. To allow larger equipment to operate at higher speeds
Answer: C. To achieve the required compaction and uniform structural
performance throughout the embankment
Rationale: Proper lift thickness and moisture control allow compaction energy to
reach the full lift and produce the specified density and stability.
3. A contractor places fill on a slope that exceeds the specified maximum
embankment slope. What is the primary concern?
A. Increased pavement color variation
B. Reduced aggregate gradation
C. Slope instability, erosion, and failure to conform to the design
D. Increased asphalt viscosity
Answer: C. Slope instability, erosion, and failure to conform to the design
Rationale: Embankment geometry affects stability, drainage, erosion resistance,
right-of-way impacts, and compliance with the plans.
4. What is the primary purpose of proof rolling a prepared highway subgrade?
A. To determine asphalt content
B. To establish traffic-control limits
C. To identify weak or yielding areas that may require corrective treatment
D. To replace laboratory compaction testing
,Answer: C. To identify weak or yielding areas that may require corrective
treatment
Rationale: Proof rolling provides a field indication of localized instability or
excessive deflection that may not be obvious during visual inspection.
5. If a grader cuts too deeply below the required subgrade elevation, which
corrective approach is generally most appropriate?
A. Leave the area low and increase striping thickness
B. Restore the elevation with approved material and compact it as required
C. Fill it with loose soil without compaction
D. Cover it with seal coat
Answer: B. Restore the elevation with approved material and compact it as
required
Rationale: Low areas must be restored using approved materials and proper
compaction to maintain the designed pavement structure and drainage profile.
6. What is the principal reason for establishing positive drainage on a highway
project?
A. To increase vehicle speed
B. To reduce aggregate crushing
C. To prevent water from weakening pavement, subgrade, and embankment
materials
D. To eliminate all shoulder maintenance
Answer: C. To prevent water from weakening pavement, subgrade, and
embankment materials
Rationale: Water infiltration and ponding can reduce soil strength, accelerate
pavement deterioration, and cause erosion and instability.
7. A ditch has the correct cross section but inadequate longitudinal grade.
What problem can result?
, A. Excessive asphalt density
B. Standing water and sediment accumulation
C. Excessive concrete strength
D. Improved drainage capacity
Answer: B. Standing water and sediment accumulation
Rationale: Drainage channels require adequate slope and hydraulic capacity to
convey water and minimize deposition.
8. When installing a culvert, why is proper bedding important?
A. It increases pavement color
B. It eliminates the need for backfill
C. It provides uniform support and helps prevent differential settlement
D. It increases pipe diameter
Answer: C. It provides uniform support and helps prevent differential
settlement
Rationale: Proper bedding distributes loads and supports the pipe uniformly,
reducing deformation and settlement problems.
9. A pipe culvert is installed with an improperly aligned joint. What is a likely
consequence?
A. Increased concrete slump
B. Leakage, infiltration, structural weakness, or obstruction of flow
C. Improved hydraulic performance
D. Reduced need for headwalls
Answer: B. Leakage, infiltration, structural weakness, or obstruction of flow
Rationale: Improper joints can compromise both structural integrity and
hydraulic performance.
10.Why should trench backfill around a drainage structure be compacted in
controlled lifts?
Examination — Local Jurisdiction
Practice Exam 2026 | 100 Questions &
Answers with Detailed Rationales |
Complete Exam Prep & Study Guide
1. During highway excavation, the contractor encounters unsuitable saturated
subgrade that cannot support the specified pavement section. What is the
most appropriate first action?
A. Place aggregate base immediately over the wet material
B. Increase asphalt thickness without approval
C. Notify the appropriate project representative and address the unsuitable
material according to the contract requirements
D. Compact the saturated material with additional passes
Answer: C. Notify the appropriate project representative and address the
unsuitable material according to the contract requirements
,Rationale: Unsuitable subgrade generally requires evaluation and an approved
corrective method such as undercutting, replacement, stabilization, or drainage
improvement.
2. A highway embankment is being constructed in controlled lifts. Why are lift
thickness and moisture content controlled?
A. To reduce surveying requirements
B. To eliminate the need for density testing
C. To achieve the required compaction and uniform structural performance
throughout the embankment
D. To allow larger equipment to operate at higher speeds
Answer: C. To achieve the required compaction and uniform structural
performance throughout the embankment
Rationale: Proper lift thickness and moisture control allow compaction energy to
reach the full lift and produce the specified density and stability.
3. A contractor places fill on a slope that exceeds the specified maximum
embankment slope. What is the primary concern?
A. Increased pavement color variation
B. Reduced aggregate gradation
C. Slope instability, erosion, and failure to conform to the design
D. Increased asphalt viscosity
Answer: C. Slope instability, erosion, and failure to conform to the design
Rationale: Embankment geometry affects stability, drainage, erosion resistance,
right-of-way impacts, and compliance with the plans.
4. What is the primary purpose of proof rolling a prepared highway subgrade?
A. To determine asphalt content
B. To establish traffic-control limits
C. To identify weak or yielding areas that may require corrective treatment
D. To replace laboratory compaction testing
,Answer: C. To identify weak or yielding areas that may require corrective
treatment
Rationale: Proof rolling provides a field indication of localized instability or
excessive deflection that may not be obvious during visual inspection.
5. If a grader cuts too deeply below the required subgrade elevation, which
corrective approach is generally most appropriate?
A. Leave the area low and increase striping thickness
B. Restore the elevation with approved material and compact it as required
C. Fill it with loose soil without compaction
D. Cover it with seal coat
Answer: B. Restore the elevation with approved material and compact it as
required
Rationale: Low areas must be restored using approved materials and proper
compaction to maintain the designed pavement structure and drainage profile.
6. What is the principal reason for establishing positive drainage on a highway
project?
A. To increase vehicle speed
B. To reduce aggregate crushing
C. To prevent water from weakening pavement, subgrade, and embankment
materials
D. To eliminate all shoulder maintenance
Answer: C. To prevent water from weakening pavement, subgrade, and
embankment materials
Rationale: Water infiltration and ponding can reduce soil strength, accelerate
pavement deterioration, and cause erosion and instability.
7. A ditch has the correct cross section but inadequate longitudinal grade.
What problem can result?
, A. Excessive asphalt density
B. Standing water and sediment accumulation
C. Excessive concrete strength
D. Improved drainage capacity
Answer: B. Standing water and sediment accumulation
Rationale: Drainage channels require adequate slope and hydraulic capacity to
convey water and minimize deposition.
8. When installing a culvert, why is proper bedding important?
A. It increases pavement color
B. It eliminates the need for backfill
C. It provides uniform support and helps prevent differential settlement
D. It increases pipe diameter
Answer: C. It provides uniform support and helps prevent differential
settlement
Rationale: Proper bedding distributes loads and supports the pipe uniformly,
reducing deformation and settlement problems.
9. A pipe culvert is installed with an improperly aligned joint. What is a likely
consequence?
A. Increased concrete slump
B. Leakage, infiltration, structural weakness, or obstruction of flow
C. Improved hydraulic performance
D. Reduced need for headwalls
Answer: B. Leakage, infiltration, structural weakness, or obstruction of flow
Rationale: Improper joints can compromise both structural integrity and
hydraulic performance.
10.Why should trench backfill around a drainage structure be compacted in
controlled lifts?
