Arizona R-5 Dual Residential & Small
Commercial Contractor Practice Exam
Questions And Correct Answers (Verified
Answers) Plus Rationales 2026 Q&A
1. An Arizona R-5 Drilling Contractor license authorizes work primarily for:
A) Constructing residential foundations
B) Drilling wells for water, geothermal, or mineral exploration
C) Installing underground electrical systems
D) Grading and paving roads
Correct Answer: B
Rationale: The Arizona R-5 license specifically authorizes contractors to drill wells
for water, geothermal purposes, and mineral exploration, not general construction .
2. A contractor with an R-5 license may also install backflow prevention
assemblies. This work is governed by which Arizona agency?
A) Arizona Registrar of Contractors (ROC)
B) Arizona Department of Environmental Quality (ADEQ)
C) Arizona Department of Water Resources (ADWR)
D) Occupational Safety and Health Administration (OSHA)
Correct Answer: B
,Rationale: The R-5/C-5/CR-5 certification for backflow prevention is regulated by
the Arizona Department of Environmental Quality (ADEQ) to ensure public health
and water quality .
3. A new water well in Arizona must be set back a minimum of how many feet
from an existing septic system?
A) 25 feet
B) 50 feet
C) 75 feet
D) 100 feet
Correct Answer: D
Rationale: Arizona Department of Water Resources regulations require a minimum
setback of 100 feet between water wells and septic systems to prevent
contamination of groundwater .
4. In the context of the R-5 license, what is the minimum distance a residential
building must be set back from the property line according to standard zoning?
A) 2 feet
B) 5 feet
C) 10 feet
D) 20 feet
Correct Answer: C
,Rationale: Typical zoning regulations require a 10-foot setback to ensure safety,
privacy, and fire protection .
5. What is the primary responsibility of a contractor regarding building permits?
A) Inspecting the property before purchase
B) Obtaining all necessary permits before starting work
C) Selling the property after construction
D) Hiring subcontractors without contracts
Correct Answer: B
Rationale: Contractors must ensure all work is permitted to comply with local
building codes and avoid legal issues .
6. Which document outlines the scope of work and project specifications?
A) Lien waiver
B) Building permit
C) Contract
D) Warranty
Correct Answer: C
Rationale: A written contract defines responsibilities, materials, timelines, and
scope to prevent disputes .
, 7. The Arizona R-5 license is part of which category of Arizona contractor
licenses?
A) General Commercial Contracting
B) Specialty Dual Contracting
C) General Residential Contracting
D) Engineering Contracting
Correct Answer: B
Rationale: The R-5 is a Specialty Dual (CR) license that combines commercial and
residential scope .
8. When must a contractor provide a lien waiver?
A) After project completion
B) Before work starts
C) Upon payment for services or materials
D) Only when requested by the owner
Correct Answer: C
Rationale: Lien waivers protect property owners from claims by subcontractors or
suppliers after payment .
9. How often must an Arizona R-5 contractor renew their license?
A) Every year
B) Every 2 years
Commercial Contractor Practice Exam
Questions And Correct Answers (Verified
Answers) Plus Rationales 2026 Q&A
1. An Arizona R-5 Drilling Contractor license authorizes work primarily for:
A) Constructing residential foundations
B) Drilling wells for water, geothermal, or mineral exploration
C) Installing underground electrical systems
D) Grading and paving roads
Correct Answer: B
Rationale: The Arizona R-5 license specifically authorizes contractors to drill wells
for water, geothermal purposes, and mineral exploration, not general construction .
2. A contractor with an R-5 license may also install backflow prevention
assemblies. This work is governed by which Arizona agency?
A) Arizona Registrar of Contractors (ROC)
B) Arizona Department of Environmental Quality (ADEQ)
C) Arizona Department of Water Resources (ADWR)
D) Occupational Safety and Health Administration (OSHA)
Correct Answer: B
,Rationale: The R-5/C-5/CR-5 certification for backflow prevention is regulated by
the Arizona Department of Environmental Quality (ADEQ) to ensure public health
and water quality .
3. A new water well in Arizona must be set back a minimum of how many feet
from an existing septic system?
A) 25 feet
B) 50 feet
C) 75 feet
D) 100 feet
Correct Answer: D
Rationale: Arizona Department of Water Resources regulations require a minimum
setback of 100 feet between water wells and septic systems to prevent
contamination of groundwater .
4. In the context of the R-5 license, what is the minimum distance a residential
building must be set back from the property line according to standard zoning?
A) 2 feet
B) 5 feet
C) 10 feet
D) 20 feet
Correct Answer: C
,Rationale: Typical zoning regulations require a 10-foot setback to ensure safety,
privacy, and fire protection .
5. What is the primary responsibility of a contractor regarding building permits?
A) Inspecting the property before purchase
B) Obtaining all necessary permits before starting work
C) Selling the property after construction
D) Hiring subcontractors without contracts
Correct Answer: B
Rationale: Contractors must ensure all work is permitted to comply with local
building codes and avoid legal issues .
6. Which document outlines the scope of work and project specifications?
A) Lien waiver
B) Building permit
C) Contract
D) Warranty
Correct Answer: C
Rationale: A written contract defines responsibilities, materials, timelines, and
scope to prevent disputes .
, 7. The Arizona R-5 license is part of which category of Arizona contractor
licenses?
A) General Commercial Contracting
B) Specialty Dual Contracting
C) General Residential Contracting
D) Engineering Contracting
Correct Answer: B
Rationale: The R-5 is a Specialty Dual (CR) license that combines commercial and
residential scope .
8. When must a contractor provide a lien waiver?
A) After project completion
B) Before work starts
C) Upon payment for services or materials
D) Only when requested by the owner
Correct Answer: C
Rationale: Lien waivers protect property owners from claims by subcontractors or
suppliers after payment .
9. How often must an Arizona R-5 contractor renew their license?
A) Every year
B) Every 2 years
