2026 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
What does the "CR" designation in the CR-21 license stand for?
A) Commercial Residential
B) Contractors Registered
C) Dual License (Commercial and Residential)
D) Certified Registered
C) Dual License (Commercial and Residential)
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.
This consolidation simplifies licensing for contractors working in both sectors .
QUESTION 2
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
B) A-21 Landscaping and Irrigation Systems, L-26 Landscaping, L-44 Irrigation
Systems, C-21 Landscaping and Irrigation Systems
,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 .
QUESTION 3
What is the approximate application fee for a CR-21 license in Arizona?
A) $250
B) $580
C) $1,000
D) $2,500
B) $580
Rationale: As of 2024, the application fee for commercial CR-21 licenses is approximately
$580. Residential licenses have different fee structures, and fees are subject to change .
QUESTION 4
The CR-21 license allows which of the following scopes of work?
A) Tree removal only
B) Structural engineering of retaining walls over 6 feet
C) Installation of residential misting systems under 1,000 psi
D) Commercial building electrical work
C) Installation of residential misting systems under 1,000 psi
Rationale: A CR-21 licensee may install residential misting systems under 1,000 psi.
Structural walls over 6 feet, building electrical work, and other specialized work require
separate licenses .
QUESTION 5
Which of the following activities is specifically INCLUDED under the CR-21 license
classification?
,A) Installing swimming pools
B) Building outdoor kitchens with plumbing and electrical
C) Installing drip irrigation systems
D) Constructing residential buildings
C) Installing drip irrigation systems
Rationale: The CR-21 license specifically includes installation of drip irrigation systems.
Other activities may require additional licenses or are excluded from the CR-21 scope .
QUESTION 6
According to OSHA, employers with 11 or more employees must maintain:
A) An oral evacuation plan only
B) A written record-keeping system for illnesses and injuries
C) A full-time safety officer on every job site
D) Weekly safety meetings with documented attendance
B) A written record-keeping system for illnesses and injuries
Rationale: OSHA requires employers with 11+ employees to maintain written record-
keeping of work-related illnesses and injuries using OSHA Form 300 (Log of Work-Related
Injuries and Illnesses) .
QUESTION 7
According to OSHA, what type of evacuation plan is required for an employer with 10 or
fewer employees?
A) Written plan only
B) Oral plan only
C) Both oral and written plans
D) No plan required
B) Oral plan only
, Rationale: Employers with 10 or fewer employees may communicate an oral evacuation
plan to employees rather than maintaining a written plan, though written plans are
recommended .
QUESTION 8
A contractor found in willful violation of Arizona Blue Stake requirements may face a
maximum fine of:
A) $1,000
B) $2,500
C) $5,000
D) $10,000
C) $5,000
Rationale: Willful violation of Arizona Blue Stake laws (failure to mark or respect utility
locates) carries a maximum fine of $5,000 .
QUESTION 9
All piping for gray water shall be marked:
A) "Recycled Water – Do Not Drink"
B) "Danger – Unsafe Water"
C) "Caution – Irrigation Water Only"
D) "Warning – Non-Potable Water"
B) "Danger – Unsafe Water"
Rationale: Per Arizona regulations, all piping for gray water systems must be clearly
marked "Danger – Unsafe Water" to prevent accidental cross-connection with potable
water supplies .
EXAM PRACTICE MCQs All Questions & Correct Answers with
Detailed Rationales
Updated for the Current Year | Stuvia-Ready Format
QUESTION 1
What does the "CR" designation in the CR-21 license stand for?
A) Commercial Residential
B) Contractors Registered
C) Dual License (Commercial and Residential)
D) Certified Registered
C) Dual License (Commercial and Residential)
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.
This consolidation simplifies licensing for contractors working in both sectors .
QUESTION 2
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
B) A-21 Landscaping and Irrigation Systems, L-26 Landscaping, L-44 Irrigation
Systems, C-21 Landscaping and Irrigation Systems
,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 .
QUESTION 3
What is the approximate application fee for a CR-21 license in Arizona?
A) $250
B) $580
C) $1,000
D) $2,500
B) $580
Rationale: As of 2024, the application fee for commercial CR-21 licenses is approximately
$580. Residential licenses have different fee structures, and fees are subject to change .
QUESTION 4
The CR-21 license allows which of the following scopes of work?
A) Tree removal only
B) Structural engineering of retaining walls over 6 feet
C) Installation of residential misting systems under 1,000 psi
D) Commercial building electrical work
C) Installation of residential misting systems under 1,000 psi
Rationale: A CR-21 licensee may install residential misting systems under 1,000 psi.
Structural walls over 6 feet, building electrical work, and other specialized work require
separate licenses .
QUESTION 5
Which of the following activities is specifically INCLUDED under the CR-21 license
classification?
,A) Installing swimming pools
B) Building outdoor kitchens with plumbing and electrical
C) Installing drip irrigation systems
D) Constructing residential buildings
C) Installing drip irrigation systems
Rationale: The CR-21 license specifically includes installation of drip irrigation systems.
Other activities may require additional licenses or are excluded from the CR-21 scope .
QUESTION 6
According to OSHA, employers with 11 or more employees must maintain:
A) An oral evacuation plan only
B) A written record-keeping system for illnesses and injuries
C) A full-time safety officer on every job site
D) Weekly safety meetings with documented attendance
B) A written record-keeping system for illnesses and injuries
Rationale: OSHA requires employers with 11+ employees to maintain written record-
keeping of work-related illnesses and injuries using OSHA Form 300 (Log of Work-Related
Injuries and Illnesses) .
QUESTION 7
According to OSHA, what type of evacuation plan is required for an employer with 10 or
fewer employees?
A) Written plan only
B) Oral plan only
C) Both oral and written plans
D) No plan required
B) Oral plan only
, Rationale: Employers with 10 or fewer employees may communicate an oral evacuation
plan to employees rather than maintaining a written plan, though written plans are
recommended .
QUESTION 8
A contractor found in willful violation of Arizona Blue Stake requirements may face a
maximum fine of:
A) $1,000
B) $2,500
C) $5,000
D) $10,000
C) $5,000
Rationale: Willful violation of Arizona Blue Stake laws (failure to mark or respect utility
locates) carries a maximum fine of $5,000 .
QUESTION 9
All piping for gray water shall be marked:
A) "Recycled Water – Do Not Drink"
B) "Danger – Unsafe Water"
C) "Caution – Irrigation Water Only"
D) "Warning – Non-Potable Water"
B) "Danger – Unsafe Water"
Rationale: Per Arizona regulations, all piping for gray water systems must be clearly
marked "Danger – Unsafe Water" to prevent accidental cross-connection with potable
water supplies .
