NORTH CAROLINA (NC) (H) GRADING & EXCAVATING PRACTICE TEST EXAM QUESTIONS AND
CORRECT ANSWERS (VERIFIED ANSWERS) PLUS RATIONALES 2026 Q&A |LATEST EXAM
UPDATE 2026/2027..
Core Domains:
Site Layout and Control Surveys
Soil Classification and Compaction
Excavation and Trenching Safety
Erosion and Sedimentation Control
Heavy Equipment Operations
Utility Identification and Protection
Grading Mathematics and Quantities
NC Licensing Regulations and Contract Law
Introduction:
This examination is designed to evaluate the comprehensive technical knowledge, regulatory
compliance, and practical competence of candidates seeking licensure in grading and excavating
contracting within North Carolina. The assessment rigorously measures field proficiency in interpreting
construction plans, managing earthmoving operations, stabilizing soils, and executing safe trenching and
utility protection procedures. Featuring a balanced mix of direct multiple-choice knowledge inquiries and
complex job-site scenarios, the test emphasizes real-world application, risk mitigation, and sound
supervisory decision-making. Passing candidates demonstrate readiness to manage job-site safety,
environmental mandates, and operational quality in professional contracting environments.
Question 1
What is the primary purpose of establishing batter boards prior to beginning a major commercial
,excavation project?
A. To determine the exact moisture content of the subsurface soil layers
B. To provide a permanent, out-of-the-way reference point for elevation and line control
C. To measure the baseline hydraulic pressure against temporary shoring walls
D. To anchor the heavy hauling equipment during steep slope operations
🟢 B. To provide a permanent, out-of-the-way reference point for elevation and line control
🔴 RATIONALE: Batter boards are constructed outside the excavation footprint to preserve grade and
alignment reference lines without being disturbed by heavy machinery or digging operations.
Question 2
When performing a soil compaction test using the nuclear gauge method, what safety precaution is
mandatory for the equipment operator?
A. Wearing a certified radiation dosimeter badge to monitor cumulative exposure
B. Operating the device only during high-humidity atmospheric conditions
C. Disconnecting the primary battery source during depth rod adjustments
D. Keeping all site personnel within a 5-foot perimeter of the active source rod
🟢 A. Wearing a certified radiation dosimeter badge to monitor cumulative exposure
🔴 RATIONALE: Nuclear moisture-density gauges contain radioactive isotope sources, requiring
operators to wear personal dosimeter badges to track and limit occupational radiation exposure.
Question 3
According to OSHA regulations, what is the maximum allowable unshielded vertical depth for a trench
excavated in Type C soil before sloping, shoring, or shielding is required?
A. 3 feet
B. 5 feet
C. 8 feet
D. 12 feet
🟢 B. 5 feet
,🔴 RATIONALE: OSHA standard 1926.652 mandates that all workers in excavations 5 feet or more in
depth must be protected by an adequate protective system unless excavated entirely in stable rock.
Question 4
You are calculating earthwork volumes using the average end area method. Station 10+00 has an end
area of 240 square feet, and Station 11+00 has an end area of 360 square feet. What is the total volume
of cut in cubic yards between these two stations?
A. 1111.11 cubic yards
B. 1000.00 cubic yards
C. 1481.48 cubic yards
D. 2222.22 cubic yards
🟢 A. 1111.11 cubic yards
🔴 RATIONALE: Volume equals the average of the two end areas multiplied by the distance (100 feet)
divided by 27 to convert cubic feet to cubic yards. (240 + 360) / 2 = 300 sq ft average. 300 times 100 =
30,000 cubic feet. 30,000 divided by 27 equals 1111.11 cubic yards.
Question 5
Under North Carolina erosion and sedimentation control regulations, what is the maximum continuous
slope length permitted for an unpaved temporary diversion ditch before stabilization or check dams are
required?
A. It depends entirely on the design velocity and the specific soil erosivity factor
B. Exactly 100 feet regardless of soil type
C. 500 feet for all commercial grading sites
D. Temporary ditches do not require stabilization if graded under 2 percent slope
🟢 A. It depends entirely on the design velocity and the specific soil erosivity factor
🔴 RATIONALE: NC Sedimentation Pollution Control Act guidelines require channel designs to safely
handle specific runoff velocities based on local soil properties, lining types, and watershed characteristics
rather than a single arbitrary distance.
, Question 6
What soil type exhibits the highest cohesion and lowest permeability among the standard Unified Soil
Classification System groups?
A. Well-graded gravel
B. Lean clay
C. Silty sand
D. Poorly graded sand
🟢 B. Lean clay
🔴 RATIONALE: Fine-grained cohesive soils such as lean clay bind together tightly due to particle
attraction and restrict water movement far more effectively than granular sands or gravels.
Question 7
When operating a bulldozer on a steep incline, what is the safest direction to travel relative to the slope?
A. Directly straight up and straight down the slope face
B. Horizontally across the contour lines at a 90-degree angle
C. At a diagonal 45-degree angle with the blade raised high
D. In reverse gear only while turning continuously
🟢 A. Directly straight up and straight down the slope face
🔴 RATIONALE: Traveling straight up and down reduces the risk of side-hill rollover, which occurs if the
machine loses traction or center of gravity while traversing a slope horizontally.
Question 8
Prior to starting any excavation work in North Carolina, what is the mandatory minimum advance notice
required by the NC 811 notification center for routine locates?
A. 1 business hour
B. 3 full working days
C. 7 calendar days
D. 24 hours exactly
CORRECT ANSWERS (VERIFIED ANSWERS) PLUS RATIONALES 2026 Q&A |LATEST EXAM
UPDATE 2026/2027..
Core Domains:
Site Layout and Control Surveys
Soil Classification and Compaction
Excavation and Trenching Safety
Erosion and Sedimentation Control
Heavy Equipment Operations
Utility Identification and Protection
Grading Mathematics and Quantities
NC Licensing Regulations and Contract Law
Introduction:
This examination is designed to evaluate the comprehensive technical knowledge, regulatory
compliance, and practical competence of candidates seeking licensure in grading and excavating
contracting within North Carolina. The assessment rigorously measures field proficiency in interpreting
construction plans, managing earthmoving operations, stabilizing soils, and executing safe trenching and
utility protection procedures. Featuring a balanced mix of direct multiple-choice knowledge inquiries and
complex job-site scenarios, the test emphasizes real-world application, risk mitigation, and sound
supervisory decision-making. Passing candidates demonstrate readiness to manage job-site safety,
environmental mandates, and operational quality in professional contracting environments.
Question 1
What is the primary purpose of establishing batter boards prior to beginning a major commercial
,excavation project?
A. To determine the exact moisture content of the subsurface soil layers
B. To provide a permanent, out-of-the-way reference point for elevation and line control
C. To measure the baseline hydraulic pressure against temporary shoring walls
D. To anchor the heavy hauling equipment during steep slope operations
🟢 B. To provide a permanent, out-of-the-way reference point for elevation and line control
🔴 RATIONALE: Batter boards are constructed outside the excavation footprint to preserve grade and
alignment reference lines without being disturbed by heavy machinery or digging operations.
Question 2
When performing a soil compaction test using the nuclear gauge method, what safety precaution is
mandatory for the equipment operator?
A. Wearing a certified radiation dosimeter badge to monitor cumulative exposure
B. Operating the device only during high-humidity atmospheric conditions
C. Disconnecting the primary battery source during depth rod adjustments
D. Keeping all site personnel within a 5-foot perimeter of the active source rod
🟢 A. Wearing a certified radiation dosimeter badge to monitor cumulative exposure
🔴 RATIONALE: Nuclear moisture-density gauges contain radioactive isotope sources, requiring
operators to wear personal dosimeter badges to track and limit occupational radiation exposure.
Question 3
According to OSHA regulations, what is the maximum allowable unshielded vertical depth for a trench
excavated in Type C soil before sloping, shoring, or shielding is required?
A. 3 feet
B. 5 feet
C. 8 feet
D. 12 feet
🟢 B. 5 feet
,🔴 RATIONALE: OSHA standard 1926.652 mandates that all workers in excavations 5 feet or more in
depth must be protected by an adequate protective system unless excavated entirely in stable rock.
Question 4
You are calculating earthwork volumes using the average end area method. Station 10+00 has an end
area of 240 square feet, and Station 11+00 has an end area of 360 square feet. What is the total volume
of cut in cubic yards between these two stations?
A. 1111.11 cubic yards
B. 1000.00 cubic yards
C. 1481.48 cubic yards
D. 2222.22 cubic yards
🟢 A. 1111.11 cubic yards
🔴 RATIONALE: Volume equals the average of the two end areas multiplied by the distance (100 feet)
divided by 27 to convert cubic feet to cubic yards. (240 + 360) / 2 = 300 sq ft average. 300 times 100 =
30,000 cubic feet. 30,000 divided by 27 equals 1111.11 cubic yards.
Question 5
Under North Carolina erosion and sedimentation control regulations, what is the maximum continuous
slope length permitted for an unpaved temporary diversion ditch before stabilization or check dams are
required?
A. It depends entirely on the design velocity and the specific soil erosivity factor
B. Exactly 100 feet regardless of soil type
C. 500 feet for all commercial grading sites
D. Temporary ditches do not require stabilization if graded under 2 percent slope
🟢 A. It depends entirely on the design velocity and the specific soil erosivity factor
🔴 RATIONALE: NC Sedimentation Pollution Control Act guidelines require channel designs to safely
handle specific runoff velocities based on local soil properties, lining types, and watershed characteristics
rather than a single arbitrary distance.
, Question 6
What soil type exhibits the highest cohesion and lowest permeability among the standard Unified Soil
Classification System groups?
A. Well-graded gravel
B. Lean clay
C. Silty sand
D. Poorly graded sand
🟢 B. Lean clay
🔴 RATIONALE: Fine-grained cohesive soils such as lean clay bind together tightly due to particle
attraction and restrict water movement far more effectively than granular sands or gravels.
Question 7
When operating a bulldozer on a steep incline, what is the safest direction to travel relative to the slope?
A. Directly straight up and straight down the slope face
B. Horizontally across the contour lines at a 90-degree angle
C. At a diagonal 45-degree angle with the blade raised high
D. In reverse gear only while turning continuously
🟢 A. Directly straight up and straight down the slope face
🔴 RATIONALE: Traveling straight up and down reduces the risk of side-hill rollover, which occurs if the
machine loses traction or center of gravity while traversing a slope horizontally.
Question 8
Prior to starting any excavation work in North Carolina, what is the mandatory minimum advance notice
required by the NC 811 notification center for routine locates?
A. 1 business hour
B. 3 full working days
C. 7 calendar days
D. 24 hours exactly
