MASTER THE ARIZONA CR41 SEPTIC TANKS & SYSTEMS LICENSING EXAM QUESTIONS AND ANSWERS
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CORE DOMAINS
Arizona Rules and Regulations for On-Site Wastewater Treatment Facilities (A.A.C. Title 18, Chapter 9)
Site Evaluation, Soil Assessment, and Percolation Testing
Conventional Septic Tank Design, Installation, and Materials
Drainfield Dispersal Methods: Trenches, Beds, and Chambers
Alternative and Advanced Treatment Systems (Aerobic, Mound, Drip)
Septic System Inspection, Operation, and Maintenance
Safety, Excavation, and Confined Space Entry
Arizona Department of Environmental Quality (ADEQ) Permitting and Notification
System Troubleshooting and Repair
Business Practices and Contractor Responsibilities
This practice assessment is designed for candidates preparing for the Arizona CR-41 Septic Tanks and Systems
Contractor Licensing Examination. The examination evaluates the technical competencies required to design,
install, inspect, maintain, and repair conventional and alternative on-site wastewater treatment facilities in
,compliance with the Arizona Administrative Code (Title 18, Chapter 9), ADEQ permitting requirements, and local
county health department regulations. Key skills assessed include performing site evaluations and percolation
tests, sizing septic tanks and dispersal fields, interpreting soil profiles for treatment suitability, applying safety
standards for excavation and confined spaces, and troubleshooting system failures. Questions simulate realistic
field and office scenarios to test critical thinking, regulatory compliance, and professional judgment. The format
consists of 100 original multiple-choice questions that mirror the cognitive demands, style, and difficulty
distribution of the live proctored examination.
SECTION ONE
Question 1
According to Arizona Administrative Code (A.A.C.) Title 18, Chapter 9, what is the minimum liquid capacity for a
septic tank serving a residence with three bedrooms?
A. 750 gallons
B. 1,000 gallons
C. 1,200 gallons
D. 1,500 gallons
🟢 Correct Answer: B
🔴 RATIONALE: Arizona regulations typically require a minimum of 1,000 gallons for a three-bedroom
residence. The standard minimum for any residence is 1,000 gallons, with increases for larger homes.
,Question 2
An ADEQ "Notice of Intent to Construct" for an on-site wastewater treatment facility must be submitted before:
A. The property is sold
B. Any excavation or construction begins
C. The house is painted
D. The well is drilled
🟢 Correct Answer: B
🔴 RATIONALE: The Notice of Intent is the permit application. Construction cannot legally commence until the
application is approved by the permitting authority (ADEQ or delegated county).
Question 3
What is the minimum vertical separation required between the bottom of a standard drainfield trench and the
seasonal high groundwater table in Arizona?
A. 2 feet
B. 4 feet
C. 5 feet
D. 10 feet
, 🟢 Correct Answer: C
🔴 RATIONALE: Arizona regulations require a minimum of 5 feet of unsaturated soil between the trench bottom
and the limiting condition (groundwater, bedrock, or impermeable layer) to ensure adequate treatment.
Question 4
A soil evaluation reveals a percolation rate of 45 minutes per inch for a soil absorption system. This soil is likely
classified as:
A. Coarse sand
B. Sandy loam
C. Silt or clay loam with moderate permeability
D. Impervious clay
🟢 Correct Answer: C
🔴 RATIONALE: Rates between 30-60 min/inch are typical of moderate to slow permeability soils like silt loams
and some clay loams. Sand is typically under 5 min/inch. Clays can exceed 60 min/inch or fail.
Question 5
The primary purpose of the outlet baffle in a septic tank is to:
ALREADY GRADED A+. 100% Verified Solutions | Updated Per Latest Guidelines | Graded A+...
CORE DOMAINS
Arizona Rules and Regulations for On-Site Wastewater Treatment Facilities (A.A.C. Title 18, Chapter 9)
Site Evaluation, Soil Assessment, and Percolation Testing
Conventional Septic Tank Design, Installation, and Materials
Drainfield Dispersal Methods: Trenches, Beds, and Chambers
Alternative and Advanced Treatment Systems (Aerobic, Mound, Drip)
Septic System Inspection, Operation, and Maintenance
Safety, Excavation, and Confined Space Entry
Arizona Department of Environmental Quality (ADEQ) Permitting and Notification
System Troubleshooting and Repair
Business Practices and Contractor Responsibilities
This practice assessment is designed for candidates preparing for the Arizona CR-41 Septic Tanks and Systems
Contractor Licensing Examination. The examination evaluates the technical competencies required to design,
install, inspect, maintain, and repair conventional and alternative on-site wastewater treatment facilities in
,compliance with the Arizona Administrative Code (Title 18, Chapter 9), ADEQ permitting requirements, and local
county health department regulations. Key skills assessed include performing site evaluations and percolation
tests, sizing septic tanks and dispersal fields, interpreting soil profiles for treatment suitability, applying safety
standards for excavation and confined spaces, and troubleshooting system failures. Questions simulate realistic
field and office scenarios to test critical thinking, regulatory compliance, and professional judgment. The format
consists of 100 original multiple-choice questions that mirror the cognitive demands, style, and difficulty
distribution of the live proctored examination.
SECTION ONE
Question 1
According to Arizona Administrative Code (A.A.C.) Title 18, Chapter 9, what is the minimum liquid capacity for a
septic tank serving a residence with three bedrooms?
A. 750 gallons
B. 1,000 gallons
C. 1,200 gallons
D. 1,500 gallons
🟢 Correct Answer: B
🔴 RATIONALE: Arizona regulations typically require a minimum of 1,000 gallons for a three-bedroom
residence. The standard minimum for any residence is 1,000 gallons, with increases for larger homes.
,Question 2
An ADEQ "Notice of Intent to Construct" for an on-site wastewater treatment facility must be submitted before:
A. The property is sold
B. Any excavation or construction begins
C. The house is painted
D. The well is drilled
🟢 Correct Answer: B
🔴 RATIONALE: The Notice of Intent is the permit application. Construction cannot legally commence until the
application is approved by the permitting authority (ADEQ or delegated county).
Question 3
What is the minimum vertical separation required between the bottom of a standard drainfield trench and the
seasonal high groundwater table in Arizona?
A. 2 feet
B. 4 feet
C. 5 feet
D. 10 feet
, 🟢 Correct Answer: C
🔴 RATIONALE: Arizona regulations require a minimum of 5 feet of unsaturated soil between the trench bottom
and the limiting condition (groundwater, bedrock, or impermeable layer) to ensure adequate treatment.
Question 4
A soil evaluation reveals a percolation rate of 45 minutes per inch for a soil absorption system. This soil is likely
classified as:
A. Coarse sand
B. Sandy loam
C. Silt or clay loam with moderate permeability
D. Impervious clay
🟢 Correct Answer: C
🔴 RATIONALE: Rates between 30-60 min/inch are typical of moderate to slow permeability soils like silt loams
and some clay loams. Sand is typically under 5 min/inch. Clays can exceed 60 min/inch or fail.
Question 5
The primary purpose of the outlet baffle in a septic tank is to:
