Arizona (AZ) CR21 Hardscaping &
Irrigation Systems Practice Exam 2026 |
ROC Study Guide
Question 1: Which of the following best defines "hardscaping" in the context of
the CR-21 license?
A) The planting and maintenance of vegetation
B) The design and installation of non-plant features in a landscape
C) The application of fertilizers and pesticides
D) The installation of swimming pools and spas
Correct ,,,answer,,,,: B. The design and installation of non-plant features in a
landscape
Rationale: Hardscaping involves non-living landscape components such as patios,
retaining walls, pavers, walkways, and other structural elements. The CR-21
license specifically covers these features along with irrigation systems .
Question 2: The CR-21 license allows which of the following scopes of work?
A) Structural engineering of retaining walls over 6 feet
B) Commercial building construction
C) Irrigation systems and outdoor hardscape features
D) Electrical wiring for residential buildings
Correct ,,,answer,,,,: C. Irrigation systems and outdoor hardscape features
,Rationale: CR-21 covers landscape irrigation systems, paving, retaining walls, and
other external hardscape features. It excludes structural building work and requires
separate licensing for complex engineering projects .
Question 3: Which of the following license classifications were consolidated into
the CR-21 Hardscaping and Irrigation Systems license?
A) C-21 Landscaping and Irrigation Systems and R-21 Residential Hardscaping
B) L-26 Landscaping and A-21 Agricultural Irrigation
C) C-21 Commercial Paving and R-21 Residential Grading
D) B-21 Building Construction and L-21 Landscape Design
Correct ,,,answer,,,,: A. C-21 Landscaping and Irrigation Systems and R-21
Residential Hardscaping
Rationale: The CR-21 license consolidated the separate C-21 (Commercial) and
R-21 (Residential) classifications into a single dual license covering both
residential and commercial hardscaping and irrigation work .
Question 4: According to Arizona Administrative Code R4-9-102, what is the
maximum height allowed for a decorative garden wall under the CR-21
classification?
A) 3 feet
B) 4 feet
C) 6 feet
D) 8 feet
,Correct ,,,answer,,,,: C. 6 feet
Rationale: The CR-21 Hardscaping and Irrigation Systems classification allows
decorative garden walls up to six feet from finish grade. This is distinct from
retaining walls, which have different height restrictions .
Question 5: What is the maximum height allowed for a retaining wall under the
CR-21 classification?
A) 2 feet from the lower finished grade
B) 3 feet from the lower finished grade
C) 4 feet from the higher finished grade
D) 6 feet from the lower finished grade
Correct ,,,answer,,,,: B. 3 feet from the lower finished grade
Rationale: The scope of work for an Arizona CR-21 license restricts retaining
walls to a maximum height of 3 feet measured from the finished grade of the lower
elevation. Walls exceeding this height require engineering credentials .
Question 6: To obtain a CR-21 license in Arizona, the Qualifying Party must
generally meet which requirement?
A) Have 2 years of verifiable landscaping experience
B) Have 4 years of verifiable landscaping experience
C) Have 6 years of verifiable landscaping experience
D) Have 8 years of verifiable landscaping experience
, Correct ,,,answer,,,,: B. Have 4 years of verifiable landscaping experience
Rationale: The Qualifying Party needs 4 years of verifiable landscaping
experience to obtain a CR-21 license. This experience must be documented and
verified .
Question 7: Which exams must an applicant pass to obtain a CR-21 license?
A) Trade Exam only
B) Statutes & Rules Exam (SRE) only
C) Both Trade Exam and Statutes & Rules Exam (SRE)
D) Business Management Exam only
Correct ,,,answer,,,,: C. Both Trade Exam and Statutes & Rules Exam (SRE)
Rationale: Applicants must pass the Trade Exam for CR-21 classification and the
Statutes & Rules Exam (SRE). The SRE covers Arizona contractor laws and
regulations administered by the Registrar of Contractors .
Question 8: Approximately how much is the application fee for a commercial CR-
21 license (as of recent years)?
A) $280
B) $580
C) $1,000
D) $1,500
Correct ,,,answer,,,,: B. $580
Irrigation Systems Practice Exam 2026 |
ROC Study Guide
Question 1: Which of the following best defines "hardscaping" in the context of
the CR-21 license?
A) The planting and maintenance of vegetation
B) The design and installation of non-plant features in a landscape
C) The application of fertilizers and pesticides
D) The installation of swimming pools and spas
Correct ,,,answer,,,,: B. The design and installation of non-plant features in a
landscape
Rationale: Hardscaping involves non-living landscape components such as patios,
retaining walls, pavers, walkways, and other structural elements. The CR-21
license specifically covers these features along with irrigation systems .
Question 2: The CR-21 license allows which of the following scopes of work?
A) Structural engineering of retaining walls over 6 feet
B) Commercial building construction
C) Irrigation systems and outdoor hardscape features
D) Electrical wiring for residential buildings
Correct ,,,answer,,,,: C. Irrigation systems and outdoor hardscape features
,Rationale: CR-21 covers landscape irrigation systems, paving, retaining walls, and
other external hardscape features. It excludes structural building work and requires
separate licensing for complex engineering projects .
Question 3: Which of the following license classifications were consolidated into
the CR-21 Hardscaping and Irrigation Systems license?
A) C-21 Landscaping and Irrigation Systems and R-21 Residential Hardscaping
B) L-26 Landscaping and A-21 Agricultural Irrigation
C) C-21 Commercial Paving and R-21 Residential Grading
D) B-21 Building Construction and L-21 Landscape Design
Correct ,,,answer,,,,: A. C-21 Landscaping and Irrigation Systems and R-21
Residential Hardscaping
Rationale: The CR-21 license consolidated the separate C-21 (Commercial) and
R-21 (Residential) classifications into a single dual license covering both
residential and commercial hardscaping and irrigation work .
Question 4: According to Arizona Administrative Code R4-9-102, what is the
maximum height allowed for a decorative garden wall under the CR-21
classification?
A) 3 feet
B) 4 feet
C) 6 feet
D) 8 feet
,Correct ,,,answer,,,,: C. 6 feet
Rationale: The CR-21 Hardscaping and Irrigation Systems classification allows
decorative garden walls up to six feet from finish grade. This is distinct from
retaining walls, which have different height restrictions .
Question 5: What is the maximum height allowed for a retaining wall under the
CR-21 classification?
A) 2 feet from the lower finished grade
B) 3 feet from the lower finished grade
C) 4 feet from the higher finished grade
D) 6 feet from the lower finished grade
Correct ,,,answer,,,,: B. 3 feet from the lower finished grade
Rationale: The scope of work for an Arizona CR-21 license restricts retaining
walls to a maximum height of 3 feet measured from the finished grade of the lower
elevation. Walls exceeding this height require engineering credentials .
Question 6: To obtain a CR-21 license in Arizona, the Qualifying Party must
generally meet which requirement?
A) Have 2 years of verifiable landscaping experience
B) Have 4 years of verifiable landscaping experience
C) Have 6 years of verifiable landscaping experience
D) Have 8 years of verifiable landscaping experience
, Correct ,,,answer,,,,: B. Have 4 years of verifiable landscaping experience
Rationale: The Qualifying Party needs 4 years of verifiable landscaping
experience to obtain a CR-21 license. This experience must be documented and
verified .
Question 7: Which exams must an applicant pass to obtain a CR-21 license?
A) Trade Exam only
B) Statutes & Rules Exam (SRE) only
C) Both Trade Exam and Statutes & Rules Exam (SRE)
D) Business Management Exam only
Correct ,,,answer,,,,: C. Both Trade Exam and Statutes & Rules Exam (SRE)
Rationale: Applicants must pass the Trade Exam for CR-21 classification and the
Statutes & Rules Exam (SRE). The SRE covers Arizona contractor laws and
regulations administered by the Registrar of Contractors .
Question 8: Approximately how much is the application fee for a commercial CR-
21 license (as of recent years)?
A) $280
B) $580
C) $1,000
D) $1,500
Correct ,,,answer,,,,: B. $580
