NICET Highway Construction Inspection
Level III Examination Questions And
Correct Answers (Verified Answers) Plus
Rationales 2026 Q&A | Instant
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Question 1
When inspecting roadway soil stabilization, which of the following is the most
critical factor to verify before accepting the work?
A. Color uniformity of the stabilized soil
B. Compaction and moisture content meeting specification requirements
C. Surface smoothness within 1/4 inch over a 10-foot straightedge
D. Vegetation growth on adjacent slopes
Answer: B. Compaction and moisture content meeting specification
requirements Rationale: Proper compaction and moisture control are essential
for ensuring long-term stability and load-bearing capacity of stabilized soil.
Compaction density and moisture content directly affect the strength and
performance of the stabilized layer. Surface smoothness, color, and vegetation
are secondary considerations that do not determine structural adequacy .
Question 2
The contractor is placing a mechanically stabilized earth (MSE) wall. During
backfilling operations, the inspector observes that the contractor is using a large
vibratory roller within 3 feet of the wall face. What should the inspector do?
,A. Allow the operation to continue as vibratory compaction is required
B. Stop the operation and require the use of lightweight hand-operated or small
mechanical equipment near the wall face
C. Require the contractor to increase the lift thickness to 12 inches
D. Allow compaction only during cooler temperatures to prevent wall damage
Answer: B. Stop the operation and require the use of lightweight hand-operated
or small mechanical equipment near the wall face Rationale: MSE wall
specifications typically require that compaction within a specified distance of the
wall face be performed with lightweight equipment to prevent excessive
pressure on the wall panels or facing elements. Heavy vibratory rollers can
damage the wall structure or cause excessive lateral pressures .
Question 3
A drilled shaft is being excavated using the dry method. The inspector must verify
that the bottom of the shaft is clean before concrete placement. What is the
maximum allowable water depth at the base for dry method acceptance?
A. No water is permitted at any time
B. 6 inches or less
C. 12 inches or less
D. 18 inches or less
Answer: C. 12 inches or less Rationale: For the dry method of drilled shaft
construction, specifications generally require that the water level at the base of
the hole not exceed 12 inches during a one-hour period when pumping is not
permitted. Additionally, the sides and bottom must remain stable with no signs
of sloughing or swelling over a four-hour period .
Question 4
When inspecting structural steel components for conformance with project
documents, which of the following must be verified for bolted connections?
,A. Bolt color coding only
B. Bolt grade, diameter, length, and torque or tension as specified
C. Bolt head markings alone
D. Bolt packaging and shipping documents
Answer: B. Bolt grade, diameter, length, and torque or tension as
specified Rationale: Structural bolted connections must be inspected for proper
bolt grade, size, and installation torque or tension to ensure the connection
meets design requirements. Bolt markings indicate grade, but the inspector
must also verify proper installation. Visual inspection alone is insufficient to
confirm connection integrity .
Question 5
A contractor is placing concrete for a bridge deck during hot weather. The thermal
control plan for mass concrete requires monitoring of concrete temperatures.
What is the maximum allowable temperature differential between the interior
and surface of the mass concrete placement?
A. 15°F
B. 25°F
C. 35°F
D. 45°F
Answer: C. 35°F Rationale: Mass concrete thermal control plans typically require
that the temperature differential between the interior and surface of the
placement not exceed 35°F to prevent thermal cracking. The inspector must
monitor temperatures using embedded thermocouples or other approved
methods and ensure the contractor implements cooling measures as required .
Question 6
During inspection of a post-tensioning operation, the hydraulic jack gauge used for
tensioning was last calibrated 8 months ago. What is the proper action?
, A. Allow the operation to proceed as the gauge appears to be functioning
B. Stop the operation and require recalibration of the gauge
C. Allow the operation but require additional documentation
D. Use a different gauge without recalibration
Answer: B. Stop the operation and require recalibration of the
gauge Rationale: Hydraulic jacks and gauges used for post-tensioning must be
calibrated every six months to ensure accurate force application. Using
uncalibrated equipment can result in under-tensioning or over-tensioning of
strands, compromising structural integrity .
Question 7
What is the primary purpose of conducting a proof roll on subgrade prior to
placing aggregate base?
A. To verify the subgrade surface is smooth
B. To check for settlement and weak areas that require stabilization
C. To measure soil moisture content
D. To determine the optimum moisture content
Answer: B. To check for settlement and weak areas that require
stabilization Rationale: Proof rolling is performed to identify soft or unstable
areas in the subgrade that may not be visible during normal inspection. A
loaded truck or roller traverses the subgrade to reveal pumping, rutting, or
excessive deflection, indicating areas that require corrective action before
paving operations proceed .
Question 8
When inspecting asphalt pavement placement, the temperature of the mix at the
paver is measured at 275°F, but the specification requires a minimum of 290°F.
What is the correct action?
Level III Examination Questions And
Correct Answers (Verified Answers) Plus
Rationales 2026 Q&A | Instant
Download Pdf
Question 1
When inspecting roadway soil stabilization, which of the following is the most
critical factor to verify before accepting the work?
A. Color uniformity of the stabilized soil
B. Compaction and moisture content meeting specification requirements
C. Surface smoothness within 1/4 inch over a 10-foot straightedge
D. Vegetation growth on adjacent slopes
Answer: B. Compaction and moisture content meeting specification
requirements Rationale: Proper compaction and moisture control are essential
for ensuring long-term stability and load-bearing capacity of stabilized soil.
Compaction density and moisture content directly affect the strength and
performance of the stabilized layer. Surface smoothness, color, and vegetation
are secondary considerations that do not determine structural adequacy .
Question 2
The contractor is placing a mechanically stabilized earth (MSE) wall. During
backfilling operations, the inspector observes that the contractor is using a large
vibratory roller within 3 feet of the wall face. What should the inspector do?
,A. Allow the operation to continue as vibratory compaction is required
B. Stop the operation and require the use of lightweight hand-operated or small
mechanical equipment near the wall face
C. Require the contractor to increase the lift thickness to 12 inches
D. Allow compaction only during cooler temperatures to prevent wall damage
Answer: B. Stop the operation and require the use of lightweight hand-operated
or small mechanical equipment near the wall face Rationale: MSE wall
specifications typically require that compaction within a specified distance of the
wall face be performed with lightweight equipment to prevent excessive
pressure on the wall panels or facing elements. Heavy vibratory rollers can
damage the wall structure or cause excessive lateral pressures .
Question 3
A drilled shaft is being excavated using the dry method. The inspector must verify
that the bottom of the shaft is clean before concrete placement. What is the
maximum allowable water depth at the base for dry method acceptance?
A. No water is permitted at any time
B. 6 inches or less
C. 12 inches or less
D. 18 inches or less
Answer: C. 12 inches or less Rationale: For the dry method of drilled shaft
construction, specifications generally require that the water level at the base of
the hole not exceed 12 inches during a one-hour period when pumping is not
permitted. Additionally, the sides and bottom must remain stable with no signs
of sloughing or swelling over a four-hour period .
Question 4
When inspecting structural steel components for conformance with project
documents, which of the following must be verified for bolted connections?
,A. Bolt color coding only
B. Bolt grade, diameter, length, and torque or tension as specified
C. Bolt head markings alone
D. Bolt packaging and shipping documents
Answer: B. Bolt grade, diameter, length, and torque or tension as
specified Rationale: Structural bolted connections must be inspected for proper
bolt grade, size, and installation torque or tension to ensure the connection
meets design requirements. Bolt markings indicate grade, but the inspector
must also verify proper installation. Visual inspection alone is insufficient to
confirm connection integrity .
Question 5
A contractor is placing concrete for a bridge deck during hot weather. The thermal
control plan for mass concrete requires monitoring of concrete temperatures.
What is the maximum allowable temperature differential between the interior
and surface of the mass concrete placement?
A. 15°F
B. 25°F
C. 35°F
D. 45°F
Answer: C. 35°F Rationale: Mass concrete thermal control plans typically require
that the temperature differential between the interior and surface of the
placement not exceed 35°F to prevent thermal cracking. The inspector must
monitor temperatures using embedded thermocouples or other approved
methods and ensure the contractor implements cooling measures as required .
Question 6
During inspection of a post-tensioning operation, the hydraulic jack gauge used for
tensioning was last calibrated 8 months ago. What is the proper action?
, A. Allow the operation to proceed as the gauge appears to be functioning
B. Stop the operation and require recalibration of the gauge
C. Allow the operation but require additional documentation
D. Use a different gauge without recalibration
Answer: B. Stop the operation and require recalibration of the
gauge Rationale: Hydraulic jacks and gauges used for post-tensioning must be
calibrated every six months to ensure accurate force application. Using
uncalibrated equipment can result in under-tensioning or over-tensioning of
strands, compromising structural integrity .
Question 7
What is the primary purpose of conducting a proof roll on subgrade prior to
placing aggregate base?
A. To verify the subgrade surface is smooth
B. To check for settlement and weak areas that require stabilization
C. To measure soil moisture content
D. To determine the optimum moisture content
Answer: B. To check for settlement and weak areas that require
stabilization Rationale: Proof rolling is performed to identify soft or unstable
areas in the subgrade that may not be visible during normal inspection. A
loaded truck or roller traverses the subgrade to reveal pumping, rutting, or
excessive deflection, indicating areas that require corrective action before
paving operations proceed .
Question 8
When inspecting asphalt pavement placement, the temperature of the mix at the
paver is measured at 275°F, but the specification requires a minimum of 290°F.
What is the correct action?
