Arizona CR21 Hardscaping & Irrigation Systems –
FINAL EXAM PRACTICE MCQs
All Questions & Correct Answers with Detailed Rationales
Updated for the Current Year | Stuvia-Ready Format
QUESTION 1
According to the Arizona Registrar of Contractors (ROC), which of the following activities
falls strictly within the scope of the CR-21 (Hardscaping and Irrigation Systems)
classification?
A) Installing a swimming pool and its associated plumbing
B) Designing and installing a residential drip irrigation system and a paver patio
C) Performing major structural grading for a new home foundation
D) Installing a whole-house plumbing system
B) Designing and installing a residential drip irrigation system and a paver patio
Rationale: The CR-21 classification specifically covers the installation, repair, and
maintenance of landscape irrigation systems and hardscaping (such as pavers, retaining
walls, and decorative concrete). Pool installation falls under the C-37 (Swimming Pool)
classification, major structural grading under C-11 (Earthwork), and whole-house
plumbing under the C-37 or R-37 plumbing classifications .
QUESTION 2
What is the maximum contract amount allowed under the Arizona CR-21 license
classification?
A) $5,000
B) $10,000
,C) $25,000
D) No monetary limit, but scope limited to hardscaping and irrigation
D) No monetary limit, but scope limited to hardscaping and irrigation
Rationale: The CR-21 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 .
QUESTION 3
Which Arizona state agency issues and regulates the CR-21 license?
A) Arizona Department of Water Resources
B) Arizona Registrar of Contractors (AZ ROC)
C) Arizona Department of Agriculture
D) Arizona Department of Environmental Quality
B) Arizona Registrar of Contractors (AZ ROC)
Rationale: The Arizona Registrar of Contractors (AZ ROC) issues and regulates all
contractor licenses, including the CR-21 for hardscaping and irrigation systems .
QUESTION 4
What is the minimum required experience for a CR-21 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
C) 4 years of relevant experience
Rationale: Arizona requires a minimum of 4 years of relevant experience for most
contractor license classifications, including CR-21 .
,QUESTION 5
According to Arizona Registrar of Contractors (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
C) 4 feet from the higher finished grade
D) 6 feet from the lower finished grade
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 .
QUESTION 6
Under Arizona law, a written contract is required for any construction or improvement
project where the total cost (labor and materials) exceeds what amount?
A) $500
B) $1,000
C) $2,500
D) $5,000
B) $1,000
Rationale: Arizona Revised Statutes (A.R.S. § 32-1152) mandate that a contractor must
have a written contract for any project where the total price, including labor, materials,
and all other costs, exceeds $1,000 .
QUESTION 7
What is the minimum bond amount required for a CR-21 contractor license?
A) $1,000
B) $5,000
, C) $10,000
D) $25,000
B) $5,000
Rationale: A.R.S. § 32-1152 requires a contractor's bond of $5,000 for residential
contractors. CR-21 is classified as residential and small commercial . Note: Some sources
cite $10,000 for the CR-21 classification specifically, so verify current ROC requirements.
QUESTION 8
According to the Arizona Registrar of Contractors, what is the minimum general liability
insurance coverage a CR-21 licensee must carry?
A) $100,000
B) $300,000
C) $500,000
D) $1,000,000
B) $300,000
Rationale: Arizona requires contractors to carry a minimum of $300,000 in general
liability insurance, though many clients require higher amounts .
QUESTION 9
Under Arizona law, which of the following activities requires a CR-21 license?
A) Installing a 6-inch tall concrete garden border that is purely decorative
B) Replacing a single sprinkler head in a residential yard
C) Installing a new irrigation mainline from the backflow device to the first valve
D) Laying decomposed granite in a flower bed without any drainage function
C) Installing a new irrigation mainline from the backflow device to the first valve
Rationale: CR-21 covers "Hardscaping & Irrigation Systems," which includes irrigation
system installation beyond minor repairs. Replacing a single head is exempt minor repair;
FINAL EXAM PRACTICE MCQs
All Questions & Correct Answers with Detailed Rationales
Updated for the Current Year | Stuvia-Ready Format
QUESTION 1
According to the Arizona Registrar of Contractors (ROC), which of the following activities
falls strictly within the scope of the CR-21 (Hardscaping and Irrigation Systems)
classification?
A) Installing a swimming pool and its associated plumbing
B) Designing and installing a residential drip irrigation system and a paver patio
C) Performing major structural grading for a new home foundation
D) Installing a whole-house plumbing system
B) Designing and installing a residential drip irrigation system and a paver patio
Rationale: The CR-21 classification specifically covers the installation, repair, and
maintenance of landscape irrigation systems and hardscaping (such as pavers, retaining
walls, and decorative concrete). Pool installation falls under the C-37 (Swimming Pool)
classification, major structural grading under C-11 (Earthwork), and whole-house
plumbing under the C-37 or R-37 plumbing classifications .
QUESTION 2
What is the maximum contract amount allowed under the Arizona CR-21 license
classification?
A) $5,000
B) $10,000
,C) $25,000
D) No monetary limit, but scope limited to hardscaping and irrigation
D) No monetary limit, but scope limited to hardscaping and irrigation
Rationale: The CR-21 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 .
QUESTION 3
Which Arizona state agency issues and regulates the CR-21 license?
A) Arizona Department of Water Resources
B) Arizona Registrar of Contractors (AZ ROC)
C) Arizona Department of Agriculture
D) Arizona Department of Environmental Quality
B) Arizona Registrar of Contractors (AZ ROC)
Rationale: The Arizona Registrar of Contractors (AZ ROC) issues and regulates all
contractor licenses, including the CR-21 for hardscaping and irrigation systems .
QUESTION 4
What is the minimum required experience for a CR-21 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
C) 4 years of relevant experience
Rationale: Arizona requires a minimum of 4 years of relevant experience for most
contractor license classifications, including CR-21 .
,QUESTION 5
According to Arizona Registrar of Contractors (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
C) 4 feet from the higher finished grade
D) 6 feet from the lower finished grade
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 .
QUESTION 6
Under Arizona law, a written contract is required for any construction or improvement
project where the total cost (labor and materials) exceeds what amount?
A) $500
B) $1,000
C) $2,500
D) $5,000
B) $1,000
Rationale: Arizona Revised Statutes (A.R.S. § 32-1152) mandate that a contractor must
have a written contract for any project where the total price, including labor, materials,
and all other costs, exceeds $1,000 .
QUESTION 7
What is the minimum bond amount required for a CR-21 contractor license?
A) $1,000
B) $5,000
, C) $10,000
D) $25,000
B) $5,000
Rationale: A.R.S. § 32-1152 requires a contractor's bond of $5,000 for residential
contractors. CR-21 is classified as residential and small commercial . Note: Some sources
cite $10,000 for the CR-21 classification specifically, so verify current ROC requirements.
QUESTION 8
According to the Arizona Registrar of Contractors, what is the minimum general liability
insurance coverage a CR-21 licensee must carry?
A) $100,000
B) $300,000
C) $500,000
D) $1,000,000
B) $300,000
Rationale: Arizona requires contractors to carry a minimum of $300,000 in general
liability insurance, though many clients require higher amounts .
QUESTION 9
Under Arizona law, which of the following activities requires a CR-21 license?
A) Installing a 6-inch tall concrete garden border that is purely decorative
B) Replacing a single sprinkler head in a residential yard
C) Installing a new irrigation mainline from the backflow device to the first valve
D) Laying decomposed granite in a flower bed without any drainage function
C) Installing a new irrigation mainline from the backflow device to the first valve
Rationale: CR-21 covers "Hardscaping & Irrigation Systems," which includes irrigation
system installation beyond minor repairs. Replacing a single head is exempt minor repair;
