1|Page
NORTH CAROLINA (NC) (H) GRADING &
EXCAVATING STUDY GUIDE & PRACTICE EXAM
2026-2028 QUESTIONS AND ANSWERS |
INSTANT PDF DOWNLOAD
Introduction
This exam is specifically designed for contractors preparing for the North Carolina (NC) (H)
Grading & Excavating License Exam. It features realistic, most-tested questions that reflect
the scope, regulations, and practical knowledge required for the state exam.
This study guide covers:
Site preparation and grading – Techniques, slope calculations, and drainage
considerations
Excavation practices – Trenching, shoring, and safety compliance
Soil types and compaction – Understanding load-bearing capacity and environmental
considerations
Equipment operation – Best practices for excavators, bulldozers, and grading machines
NC building and safety codes – Relevant state laws and permitting requirements
Estimating and project planning – Material calculations, cost estimation, and job site
management
Each question includes:
Bolded correct answers for quick review
Detailed explanations to reinforce understandin
1. What is the primary purpose of grading on a construction site?
A. To remove topsoil for landscaping
B. To create a level surface for construction and proper drainage
C. To compact the subsoil for roads only
D. To increase soil fertility
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Answer: To create a level surface for construction and proper
drainage
Explanation: Grading ensures proper slope, drainage, and foundation
stability for construction.
2. According to NC regulations, what is the maximum slope allowed
for excavations without special shoring?
A. 1:1
B. 2:1
C. 3:1
D. 4:1
Answer: 3:1
Explanation: OSHA and NC guidelines require slopes no steeper than 3:1
(horizontal:vertical) for unshored excavations in stable soil.
3. Which soil type is most prone to collapse during excavation?
A. Gravel
B. Sand
C. Silty clay
D. Rock
Answer: Silty clay
Explanation: Fine-grained soils like silty clay have low cohesion and can
collapse easily when wet.
4. What is the minimum compacted soil density typically required
under foundations?
A. 70%
B. 80%
C. 85%
D. 95%
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Answer: 95%
Explanation: Foundations require soil compacted to 95% of the maximum
dry density to ensure stability and reduce settlement.
5. What is the primary hazard of trenching deeper than 5 feet?
A. Equipment damage
B. Soil erosion
C. Cave-ins
D. Water accumulation
Answer: Cave-ins
Explanation: Trenches over 5 feet require shoring, shielding, or sloping to
prevent cave-ins according to OSHA.
6. Which equipment is commonly used for fine grading?
A. Bulldozer
B. Backhoe
C. Motor grader
D. Skid steer
Answer: Motor grader
Explanation: Motor graders provide precise grading for level surfaces,
slopes, and drainage control.
7. When calculating cut-and-fill volumes, which unit is typically used?
A. Square feet
B. Cubic yards
C. Linear feet
D. Tons
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Answer: Cubic yards
Explanation: Earthwork volumes are measured in cubic yards for both
excavation (cut) and fill operations.
8. What is the primary function of a silt fence on a grading site?
A. To guide machinery
B. To control sediment runoff
C. To mark property boundaries
D. To provide erosion-resistant landscaping
Answer: To control sediment runoff
Explanation: Silt fences prevent soil from leaving the site and protect
waterways from sediment pollution.
9. Which factor is most critical in determining soil compaction
requirements?
A. Color of soil
B. Moisture content and soil type
C. Load-bearing capacity and structural requirements
D. Vegetation type
Answer: Load-bearing capacity and structural requirements
Explanation: Soil compaction must meet the structural load requirements
for foundations and pavements.
10. Which NC agency regulates grading permits for commercial
projects?
A. NC Department of Transportation (NCDOT)
B. NC Department of Health
C. Local County or City Building Department
D. NC Environmental Protection Agency
NORTH CAROLINA (NC) (H) GRADING &
EXCAVATING STUDY GUIDE & PRACTICE EXAM
2026-2028 QUESTIONS AND ANSWERS |
INSTANT PDF DOWNLOAD
Introduction
This exam is specifically designed for contractors preparing for the North Carolina (NC) (H)
Grading & Excavating License Exam. It features realistic, most-tested questions that reflect
the scope, regulations, and practical knowledge required for the state exam.
This study guide covers:
Site preparation and grading – Techniques, slope calculations, and drainage
considerations
Excavation practices – Trenching, shoring, and safety compliance
Soil types and compaction – Understanding load-bearing capacity and environmental
considerations
Equipment operation – Best practices for excavators, bulldozers, and grading machines
NC building and safety codes – Relevant state laws and permitting requirements
Estimating and project planning – Material calculations, cost estimation, and job site
management
Each question includes:
Bolded correct answers for quick review
Detailed explanations to reinforce understandin
1. What is the primary purpose of grading on a construction site?
A. To remove topsoil for landscaping
B. To create a level surface for construction and proper drainage
C. To compact the subsoil for roads only
D. To increase soil fertility
,2|Page
Answer: To create a level surface for construction and proper
drainage
Explanation: Grading ensures proper slope, drainage, and foundation
stability for construction.
2. According to NC regulations, what is the maximum slope allowed
for excavations without special shoring?
A. 1:1
B. 2:1
C. 3:1
D. 4:1
Answer: 3:1
Explanation: OSHA and NC guidelines require slopes no steeper than 3:1
(horizontal:vertical) for unshored excavations in stable soil.
3. Which soil type is most prone to collapse during excavation?
A. Gravel
B. Sand
C. Silty clay
D. Rock
Answer: Silty clay
Explanation: Fine-grained soils like silty clay have low cohesion and can
collapse easily when wet.
4. What is the minimum compacted soil density typically required
under foundations?
A. 70%
B. 80%
C. 85%
D. 95%
,3|Page
Answer: 95%
Explanation: Foundations require soil compacted to 95% of the maximum
dry density to ensure stability and reduce settlement.
5. What is the primary hazard of trenching deeper than 5 feet?
A. Equipment damage
B. Soil erosion
C. Cave-ins
D. Water accumulation
Answer: Cave-ins
Explanation: Trenches over 5 feet require shoring, shielding, or sloping to
prevent cave-ins according to OSHA.
6. Which equipment is commonly used for fine grading?
A. Bulldozer
B. Backhoe
C. Motor grader
D. Skid steer
Answer: Motor grader
Explanation: Motor graders provide precise grading for level surfaces,
slopes, and drainage control.
7. When calculating cut-and-fill volumes, which unit is typically used?
A. Square feet
B. Cubic yards
C. Linear feet
D. Tons
, 4|Page
Answer: Cubic yards
Explanation: Earthwork volumes are measured in cubic yards for both
excavation (cut) and fill operations.
8. What is the primary function of a silt fence on a grading site?
A. To guide machinery
B. To control sediment runoff
C. To mark property boundaries
D. To provide erosion-resistant landscaping
Answer: To control sediment runoff
Explanation: Silt fences prevent soil from leaving the site and protect
waterways from sediment pollution.
9. Which factor is most critical in determining soil compaction
requirements?
A. Color of soil
B. Moisture content and soil type
C. Load-bearing capacity and structural requirements
D. Vegetation type
Answer: Load-bearing capacity and structural requirements
Explanation: Soil compaction must meet the structural load requirements
for foundations and pavements.
10. Which NC agency regulates grading permits for commercial
projects?
A. NC Department of Transportation (NCDOT)
B. NC Department of Health
C. Local County or City Building Department
D. NC Environmental Protection Agency
