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North Carolina Irrigation Contractor Examination
— Level I QUESTIONS AND VERIFIED ANSWERS
WITH RATIONALES JUST RELEASED
North Carolina Irrigation Contractor Examination — Level I (NC Irrigation License Exam) —
Summarized Coverage
The North Carolina Irrigation Contractor Level I Examination is administered under the North Carolina
Irrigation Contractors’ Licensing Board (NCICLB) and evaluates the competency of entry-level irrigation
contractors in water-efficient irrigation design, installation practices, construction methods, and basic
business operations required for licensure. The exam ensures contractors can install and manage
irrigation systems safely, efficiently, and in compliance with North Carolina irrigation laws and
standards.
1. NC Irrigation Contractor Licensing Laws
• NC irrigation contractor licensing requirements (Chapter 89G)
• Scope of irrigation contractor practice
• Legal responsibilities and compliance obligations
• Bond and licensing requirements ($10,000 surety bond)
• Disciplinary actions and enforcement rules
2. Water Efficiency & Conservation
• Efficient irrigation design principles
• Water conservation strategies
• Avoiding runoff, overspray, and waste
• Scheduling irrigation based on plant needs
• Soil moisture and evapotranspiration basics
• Pressure regulation for water efficiency
3. Irrigation System Design Basics
• System layout and zoning principles
• Head-to-head coverage concepts
• Spray, rotor, and drip irrigation components
• Pipe sizing and flow rate basics
• Water pressure and friction loss awareness
• Irrigation system planning for landscapes
4. Irrigation Installation Practices
• Trenching and pipe installation methods
• PVC and polyethylene piping systems
• Valve installation and wiring basics
• Sprinkler head placement and spacing
• Backflow prevention device installation
• Controller setup and programming basics
5. Irrigation Construction Principles
• Site preparation and grading considerations
• Proper burial depth and pipe protection
• System assembly and component connection
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• Leak prevention and pressure testing
• Repair and maintenance fundamentals
6. Water Supply & Distribution
• Municipal vs private water sources
• Pump systems and booster pumps basics
• Pressure regulation and flow control
• Valves, manifolds, and zone control
• Backflow prevention principles
7. Irrigation Controllers & Electrical Basics
• Timer and controller programming
• Solenoid valve operation
• Basic low-voltage wiring concepts
• Troubleshooting controller issues
• Sensor integration (rain, soil moisture)
8. Soil & Plant Water Requirements
• Soil types and infiltration rates
• Plant water needs and root zones
• Turf and landscape irrigation requirements
• Overwatering and underwatering effects
• Seasonal irrigation adjustments
9. Irrigation System Components
• Sprinkler heads (fixed spray, rotor, drip emitters)
• Pipes, fittings, and connectors
• Valves (manual and automatic)
• Backflow prevention devices
• Filters and pressure regulators
10. System Maintenance & Troubleshooting
• Leak detection and repair
• Clogged nozzle and head replacement
• Pressure loss diagnosis
• Valve malfunction troubleshooting
• Seasonal system start-up and winterization
11. Safety & Jobsite Practices
• OSHA jobsite safety principles
• Trenching safety and excavation hazards
• PPE use in irrigation work
• Electrical safety for controllers
• Safe handling of tools and equipment
12. Business & Contracting Skills
• Basic estimating and job costing
• Labor and material calculation basics
• Profit margin awareness
• Customer communication and contracts
• Project scheduling and management
13. Environmental Protection
• Groundwater protection practices
• Runoff prevention
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• Chemical (fertilizer/pesticide) integration awareness
• Sustainable irrigation practices
• Erosion control considerations
14. Scenario-Based Applications
• Designing irrigation zones for landscapes
• Diagnosing low-pressure irrigation systems
• Selecting correct sprinkler heads for coverage
• Fixing uneven water distribution issues
• Ensuring compliance with NC irrigation code
• Troubleshooting controller and valve failure
North Carolina Irrigation Contractor Examination (Level I)
1. What is the primary purpose of zoning in an irrigation system design?
A. Increase water pressure in all areas equally
B. Group areas with similar water needs for efficient irrigation control
C. Eliminate the need for piping
D. Reduce pipe size below code requirements
Answer: B
Rationale: Zoning allows areas with similar plant water requirements to be irrigated efficiently and
independently.
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2. What is head-to-head coverage in irrigation design?
A. Sprinklers are spaced so spray from one head reaches the next head
B. Sprinklers overlap randomly without planning
C. Water is applied only at plant roots
D. Each sprinkler operates independently without overlap
Answer: A
Rationale: Head-to-head coverage ensures uniform water distribution by overlapping spray patterns.
3. Which irrigation component prevents contaminated water from flowing back into the main supply?
A. Pressure regulator
B. Backflow prevention device
C. Sprinkler nozzle
D. Valve box
Answer: B
North Carolina Irrigation Contractor Examination
— Level I QUESTIONS AND VERIFIED ANSWERS
WITH RATIONALES JUST RELEASED
North Carolina Irrigation Contractor Examination — Level I (NC Irrigation License Exam) —
Summarized Coverage
The North Carolina Irrigation Contractor Level I Examination is administered under the North Carolina
Irrigation Contractors’ Licensing Board (NCICLB) and evaluates the competency of entry-level irrigation
contractors in water-efficient irrigation design, installation practices, construction methods, and basic
business operations required for licensure. The exam ensures contractors can install and manage
irrigation systems safely, efficiently, and in compliance with North Carolina irrigation laws and
standards.
1. NC Irrigation Contractor Licensing Laws
• NC irrigation contractor licensing requirements (Chapter 89G)
• Scope of irrigation contractor practice
• Legal responsibilities and compliance obligations
• Bond and licensing requirements ($10,000 surety bond)
• Disciplinary actions and enforcement rules
2. Water Efficiency & Conservation
• Efficient irrigation design principles
• Water conservation strategies
• Avoiding runoff, overspray, and waste
• Scheduling irrigation based on plant needs
• Soil moisture and evapotranspiration basics
• Pressure regulation for water efficiency
3. Irrigation System Design Basics
• System layout and zoning principles
• Head-to-head coverage concepts
• Spray, rotor, and drip irrigation components
• Pipe sizing and flow rate basics
• Water pressure and friction loss awareness
• Irrigation system planning for landscapes
4. Irrigation Installation Practices
• Trenching and pipe installation methods
• PVC and polyethylene piping systems
• Valve installation and wiring basics
• Sprinkler head placement and spacing
• Backflow prevention device installation
• Controller setup and programming basics
5. Irrigation Construction Principles
• Site preparation and grading considerations
• Proper burial depth and pipe protection
• System assembly and component connection
, Page 2 of 125
• Leak prevention and pressure testing
• Repair and maintenance fundamentals
6. Water Supply & Distribution
• Municipal vs private water sources
• Pump systems and booster pumps basics
• Pressure regulation and flow control
• Valves, manifolds, and zone control
• Backflow prevention principles
7. Irrigation Controllers & Electrical Basics
• Timer and controller programming
• Solenoid valve operation
• Basic low-voltage wiring concepts
• Troubleshooting controller issues
• Sensor integration (rain, soil moisture)
8. Soil & Plant Water Requirements
• Soil types and infiltration rates
• Plant water needs and root zones
• Turf and landscape irrigation requirements
• Overwatering and underwatering effects
• Seasonal irrigation adjustments
9. Irrigation System Components
• Sprinkler heads (fixed spray, rotor, drip emitters)
• Pipes, fittings, and connectors
• Valves (manual and automatic)
• Backflow prevention devices
• Filters and pressure regulators
10. System Maintenance & Troubleshooting
• Leak detection and repair
• Clogged nozzle and head replacement
• Pressure loss diagnosis
• Valve malfunction troubleshooting
• Seasonal system start-up and winterization
11. Safety & Jobsite Practices
• OSHA jobsite safety principles
• Trenching safety and excavation hazards
• PPE use in irrigation work
• Electrical safety for controllers
• Safe handling of tools and equipment
12. Business & Contracting Skills
• Basic estimating and job costing
• Labor and material calculation basics
• Profit margin awareness
• Customer communication and contracts
• Project scheduling and management
13. Environmental Protection
• Groundwater protection practices
• Runoff prevention
, Page 3 of 125
• Chemical (fertilizer/pesticide) integration awareness
• Sustainable irrigation practices
• Erosion control considerations
14. Scenario-Based Applications
• Designing irrigation zones for landscapes
• Diagnosing low-pressure irrigation systems
• Selecting correct sprinkler heads for coverage
• Fixing uneven water distribution issues
• Ensuring compliance with NC irrigation code
• Troubleshooting controller and valve failure
North Carolina Irrigation Contractor Examination (Level I)
1. What is the primary purpose of zoning in an irrigation system design?
A. Increase water pressure in all areas equally
B. Group areas with similar water needs for efficient irrigation control
C. Eliminate the need for piping
D. Reduce pipe size below code requirements
Answer: B
Rationale: Zoning allows areas with similar plant water requirements to be irrigated efficiently and
independently.
, Page 4 of 125
2. What is head-to-head coverage in irrigation design?
A. Sprinklers are spaced so spray from one head reaches the next head
B. Sprinklers overlap randomly without planning
C. Water is applied only at plant roots
D. Each sprinkler operates independently without overlap
Answer: A
Rationale: Head-to-head coverage ensures uniform water distribution by overlapping spray patterns.
3. Which irrigation component prevents contaminated water from flowing back into the main supply?
A. Pressure regulator
B. Backflow prevention device
C. Sprinkler nozzle
D. Valve box
Answer: B
