COMPREHENSIVE ARIZONA CR21 HARDSCAPING
& IRRIGATION SYSTEMS PRACTICE EXAM
2026/2027
Prepared for the Arizona Registrar of Contractors (AZ ROC) CR21 Dual License
Exam
This comprehensive study guide covers all key domains tested on the Arizona CR21
Hardscaping & Irrigation Systems Contractor Licensing Exam. Each question includes the
correct answer with a detailed rationale.
EXAM STRUCTURE OVERVIEW
The CR21 exam consists of two main components:
• Trade Exam (CR21 classification-specific content)
• Statutes & Rules Exam (SRE) (Arizona business and contractor law)
The "CR" designation indicates a Dual License, allowing contractors to perform both
commercial (C-21) and residential (R-21) hardscaping and irrigation work.
SECTION 1: LICENSE SCOPE & REGULATIONS (Questions 1-
30)
,Q1: What does the "CR" designation in CR-21 license stand for?
• A) Commercial Residential
• B) Contractors Registered
• C) Dual License (Commercial and Residential)
• D) Certified Registered
Answer: C
Rationale: The "CR" designation indicates a Dual License, allowing the contractor to
perform both commercial (C-21) and residential (R-21) hardscaping and irrigation work.
Q2: Which license classifications were consolidated to create the
current CR-21 license?
• A) A-21 and B-21
• B) A-21 Landscaping and Irrigation Systems, L-26 Landscaping, L-44
Irrigation Systems, C-21 Landscaping and Irrigation Systems
• C) C-21 only
• D) R-21 only
Answer: B
Rationale: As of July 1, 2014, the Registrar consolidated multiple prior licenses including
A-21, L-26, L-44, C-21, and C-21R into the CR-21 classification.
Q3: Which Arizona state agency issues and regulates the CR21
license?
, • A) Arizona Department of Water Resources (ADWR)
• B) Arizona Registrar of Contractors (AZ ROC)
• C) Arizona Department of Agriculture
• D) Arizona Department of Environmental Quality
Answer: B
Rationale: The Arizona Registrar of Contractors (AZ ROC) issues and regulates all
contractor licenses, including the CR21 for hardscaping and irrigation systems.
Q4: What is the maximum contract amount allowed under the
Arizona CR21 license classification?
• A) $5,000
• B) $10,000
• C) $25,000
• D) No monetary limit, but scope limited to hardscaping and irrigation
Answer: D
Rationale: The CR21 license does not have a specific monetary limit on projects but is
limited to the specific scope of hardscaping and irrigation systems. Contract amounts
may be restricted by the contractor's financial qualifications.
Q5: What is the minimum required experience for a CR21 license
applicant?
• A) 1 year of relevant experience
, • B) 2 years of relevant experience
• C) 4 years of relevant experience
• D) No specific experience requirement
Answer: C
Rationale: Arizona requires a minimum of 4 years of relevant experience for most
contractor license classifications, including CR21.
Q6: Which of the following activities is specifically INCLUDED
under the CR21 license classification?
• A) Installing swimming pools
• B) Building outdoor kitchens with plumbing and electrical
• C) Installing drip irrigation systems
• D) Constructing residential buildings
Answer: C
Rationale: The CR21 license specifically includes installation of drip irrigation systems.
Other activities may require additional licenses or are excluded from the CR21 scope.
Q7: According to AZ ROC rules, what is the maximum height
permitted for a retaining wall built under a CR-21 license without
separate engineering credentials?
• A) 2 feet from the lower finished grade
• B) 3 feet from the lower finished grade
& IRRIGATION SYSTEMS PRACTICE EXAM
2026/2027
Prepared for the Arizona Registrar of Contractors (AZ ROC) CR21 Dual License
Exam
This comprehensive study guide covers all key domains tested on the Arizona CR21
Hardscaping & Irrigation Systems Contractor Licensing Exam. Each question includes the
correct answer with a detailed rationale.
EXAM STRUCTURE OVERVIEW
The CR21 exam consists of two main components:
• Trade Exam (CR21 classification-specific content)
• Statutes & Rules Exam (SRE) (Arizona business and contractor law)
The "CR" designation indicates a Dual License, allowing contractors to perform both
commercial (C-21) and residential (R-21) hardscaping and irrigation work.
SECTION 1: LICENSE SCOPE & REGULATIONS (Questions 1-
30)
,Q1: What does the "CR" designation in CR-21 license stand for?
• A) Commercial Residential
• B) Contractors Registered
• C) Dual License (Commercial and Residential)
• D) Certified Registered
Answer: C
Rationale: The "CR" designation indicates a Dual License, allowing the contractor to
perform both commercial (C-21) and residential (R-21) hardscaping and irrigation work.
Q2: Which license classifications were consolidated to create the
current CR-21 license?
• A) A-21 and B-21
• B) A-21 Landscaping and Irrigation Systems, L-26 Landscaping, L-44
Irrigation Systems, C-21 Landscaping and Irrigation Systems
• C) C-21 only
• D) R-21 only
Answer: B
Rationale: As of July 1, 2014, the Registrar consolidated multiple prior licenses including
A-21, L-26, L-44, C-21, and C-21R into the CR-21 classification.
Q3: Which Arizona state agency issues and regulates the CR21
license?
, • A) Arizona Department of Water Resources (ADWR)
• B) Arizona Registrar of Contractors (AZ ROC)
• C) Arizona Department of Agriculture
• D) Arizona Department of Environmental Quality
Answer: B
Rationale: The Arizona Registrar of Contractors (AZ ROC) issues and regulates all
contractor licenses, including the CR21 for hardscaping and irrigation systems.
Q4: What is the maximum contract amount allowed under the
Arizona CR21 license classification?
• A) $5,000
• B) $10,000
• C) $25,000
• D) No monetary limit, but scope limited to hardscaping and irrigation
Answer: D
Rationale: The CR21 license does not have a specific monetary limit on projects but is
limited to the specific scope of hardscaping and irrigation systems. Contract amounts
may be restricted by the contractor's financial qualifications.
Q5: What is the minimum required experience for a CR21 license
applicant?
• A) 1 year of relevant experience
, • B) 2 years of relevant experience
• C) 4 years of relevant experience
• D) No specific experience requirement
Answer: C
Rationale: Arizona requires a minimum of 4 years of relevant experience for most
contractor license classifications, including CR21.
Q6: Which of the following activities is specifically INCLUDED
under the CR21 license classification?
• A) Installing swimming pools
• B) Building outdoor kitchens with plumbing and electrical
• C) Installing drip irrigation systems
• D) Constructing residential buildings
Answer: C
Rationale: The CR21 license specifically includes installation of drip irrigation systems.
Other activities may require additional licenses or are excluded from the CR21 scope.
Q7: According to AZ ROC rules, what is the maximum height
permitted for a retaining wall built under a CR-21 license without
separate engineering credentials?
• A) 2 feet from the lower finished grade
• B) 3 feet from the lower finished grade
