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100+ Free AZ ROC CR-41 Septic Systems Practice Questions

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Key Facts: AZ ROC CR-41 Septic Systems Exam

60 Questions

Official Question Count

PSI Content Outline

150 Minutes

Time Limit

PSI Content Outline

70%

Passing Score

Arizona Registrar of Contractors

$66

Exam Fee

PSI Services LLC

Open Book Computerized MCQ

Exam Format

PSI / AZ ROC Guidelines

100 Questions

Practice Question Bank

OpenExamPrep Practice Bank

The Arizona ROC CR-41 Septic Systems Examination consists of 60 multiple-choice questions administered in a 150-minute open-book PSI test session with a 70% passing score ($66 exam fee). This practice question bank provides 100 realistic practice questions with detailed technical explanations, ADEQ code references, and worked design calculations.

Sample AZ ROC CR-41 Septic Systems Practice Questions

Try these sample questions to test your AZ ROC CR-41 Septic Systems exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1Under ADEQ Title 18, Chapter 9 regulations, what is the minimum required horizontal separation distance between a residential septic tank and an active drinking water supply well?
A.100 feet
B.50 feet
C.25 feet
D.200 feet
Explanation: According to ADEQ Administrative Code R18-9-A312 (Table 1), the minimum horizontal setback between a septic tank (or soil absorption field) and a drinking water supply well is 100 feet. This buffer protects groundwater drinking sources from biological and chemical contamination. Reducing this distance requires a specific engineering variance approved by ADEQ.
2Which ADEQ Type 4 General Permit governs the design, construction, and operation of a standard conventional septic tank and gravity trench disposal system?
A.Type 4.01 General Permit
B.Type 4.02 General Permit
C.Type 4.05 General Permit
D.Type 4.12 General Permit
Explanation: Under ADEQ R18-9-E301, the Type 4.01 General Permit covers conventional on-site wastewater treatment facilities consisting of a septic tank and gravity disposal field. It is the baseline permit for standard gravity septic installations in Arizona with daily design flows under 3,000 GPD. Other Type 4 sub-permits cover alternative technologies such as ATUs or pressure distribution.
3Under Arizona ADEQ standards, what is the minimum horizontal separation distance required between a septic tank leach field and a pressurized public water main?
A.50 feet
B.10 feet
C.25 feet
D.100 feet
Explanation: ADEQ R18-9-A312 Table 1 specifies a minimum 50-foot horizontal separation between a soil absorption field (leach field) and a public water main pipe. This prevents effluent exfiltration from contaminating public potable water distribution piping in the event of main depressurization. For building service lines, a 10-foot separation is permitted.
4Before starting construction of an on-site wastewater treatment facility in Arizona, what administrative application must the contractor or owner submit to ADEQ or its delegated county authority?
A.Notice of Intent (NOI) to Discharge
B.Notice of Completion (NOC)
C.Aquifer Protection Permit Variance Application
D.Certificate of Environmental Clearance
Explanation: Under ADEQ R18-9-A301, an applicant must submit a complete Notice of Intent (NOI) to Discharge along with engineering plans and site evaluation data before initiating construction. The regulatory authority reviews the NOI and issues an Authorization to Construct (ATC) prior to any excavation or tank placement.
5Under Arizona Administrative Code R18-9-A316, a transfer of ownership inspection for an existing residential on-site wastewater treatment facility must be performed within what timeframe before the property transfer?
A.6 months
B.30 days
C.12 months
D.90 days
Explanation: A.A.C. R18-9-A316 requires the person transferring the property to retain a qualified inspector to inspect the on-site wastewater treatment facility within six months before the date of property transfer. The inspector completes the ADEQ Report of Inspection and gives it to the seller, who must hand it to the buyer before the transfer closes.
6What is the minimum required horizontal distance between a septic tank and any property boundary line under ADEQ Title 18 Chapter 9 rules?
A.5 feet
B.10 feet
C.15 feet
D.2 feet
Explanation: ADEQ R18-9-A312 Table 1 establishes a minimum 5-foot horizontal setback between a septic tank (or dosing tank) and any property line. This prevents structural encroachment and ensures adequate working room for tank maintenance equipment.
7What is the minimum horizontal setback required by ADEQ between a septic tank and a building foundation or inhabited structure?
A.5 feet
B.10 feet
C.20 feet
D.2 feet
Explanation: Under ADEQ R18-9-A312 Table 1, a septic tank must be located at least 5 feet away from building foundations or structures. For the soil absorption field (leach field), the setback increases to 10 feet from building foundations to protect against moisture intrusion and structural undermining.
8What is the standard minimum vertical separation distance required between the bottom of a conventional leach field trench and the seasonal high groundwater table under ADEQ rules?
A.5 feet
B.2 feet
C.10 feet
D.1 foot
Explanation: ADEQ R18-9-E302 requires a minimum vertical separation of 5 feet of unsaturated soil between the bottom of a conventional gravity absorption trench and the seasonal high water table or impermeable bedrock. This unsaturated zone provides essential filtration and biological pathogen reduction before effluent recharges the aquifer.
9Under Arizona Revised Statutes Title 49, why does an on-site septic system require coverage under an Aquifer Protection Permit (APP)?
A.Because it discharges pollutants directly or indirectly into the subsurface soil and underlying aquifer
B.Because it processes commercial industrial hazardous waste exclusively
C.Because it operates as a municipal public water treatment plant
D.Because it uses chemical additives to sterilize household sewage
Explanation: Under A.R.S. § 49-241, any facility that discharges pollutants to the soil or groundwater is subject to Aquifer Protection Permit rules. ADEQ streamlined residential on-site wastewater systems by establishing Type 4 General Permits, which grant standardized APP coverage provided design and installation standards are satisfied.
10Following completion of system construction, what document must be submitted to the permitting authority to receive final discharge authorization under ADEQ R18-9-A309?
A.Notice of Completion (NOC) including as-built drawings and contractor certification
B.Revised Notice of Intent (NOI)
C.Environmental Impact Assessment
D.Soil Excavation Log
Explanation: ADEQ R18-9-A309 requires the applicant to submit a Notice of Completion (NOC) form upon finishing construction. The NOC must include as-built site plans, contractor/engineer verification of compliance, and any watertightness test logs before ADEQ issues the Discharge Authorization.

About the AZ ROC CR-41 Septic Systems Exam

The Arizona ROC CR-41 Septic Tanks and Systems Examination is a 60-question, 150-minute open-book computer-administered trade licensing exam managed by PSI Services LLC for the Arizona Registrar of Contractors. It evaluates comprehensive knowledge across ADEQ Title 18 Chapter 9 rules for on-site wastewater facilities, septic tank capacity sizing, soil percolation testing, leach field trench loading calculations, distribution box installations, alternative treatment technology (ATUs, mounds, pressure distribution), system O&M and abandonment, and OSHA 1926 trench excavation safety.

Questions

60 scored questions

Time Limit

150 minutes

Passing Score

70%

Exam Fee

$66 (Arizona ROC / PSI Services LLC)

AZ ROC CR-41 Septic Systems Exam Content Outline

27%

Disposal Absorption Systems

16 of 60 items on the official PSI content outline. Leach fields, trenches, beds, chambers, sizing from soil absorption rates and setbacks.

23%

General Knowledge

14 of 60 items on the official PSI content outline. On-site wastewater fundamentals, Arizona Administrative Code Title 18 Chapter 9 permitting, site evaluation and percolation testing.

20%

Pre-Cast Septic Tanks

12 of 60 items on the official PSI content outline. Tank sizing, compartments, baffles, inlets and outlets, risers, and setting precast tanks.

10%

Installation

6 of 60 items on the official PSI content outline. Excavation, bedding, tank and line placement, grades and backfill.

10%

Distribution Box

6 of 60 items on the official PSI content outline. D-box setting, leveling, flow equalization and connections to laterals.

10%

Safety

6 of 60 items on the official PSI content outline. OSHA 29 CFR 1926 Subpart P trenching and excavation, confined space and jobsite safety.

How to Pass the AZ ROC CR-41 Septic Systems Exam

What You Need to Know

  • Passing score: 70%
  • Exam length: 60 questions
  • Time limit: 150 minutes
  • Exam fee: $66

Keys to Passing

  • Work through all 100 available questions
  • Review every answer and explanation
  • Track weak areas and revisit them
  • Use our AI tutor for tough concepts

AZ ROC CR-41 Septic Systems Study Tips from Top Performers

1Master ADEQ Title 18 Chapter 9 setback tables: learn minimum separation distances from drinking water wells (100 ft), surface water bodies (50-100 ft), property lines (5 ft), and building foundations (5 ft).
2Practice septic tank liquid volume sizing under ADEQ rules based on bedroom counts (e.g., 1,000 gal for 1-3 BR, 1,250 gal for 4 BR, 1,500 gal for 5 BR) and commercial daily flow calculations.
3Understand soil percolation test protocols: hole dimensions (6-12 inch diameter), 4-hour or overnight presoak rules, and min/inch rate calculations.
4Calculate trench absorptive area requirements using Hydraulic Loading Rates (HLR) based on soil perc rates, accounting for trench bottom width and effective sidewall depth.
5Memorize OSHA 29 CFR 1926 Subpart P excavation rules: 5-ft cave-in protection depth, Type A (1/2:1 slope), Type B (1:1 slope), Type C (1-1/2:1 slope), 25-ft ladder travel distance, and 2-ft spoil pile setback.

Frequently Asked Questions

How many questions are on the official Arizona ROC CR-41 Septic Systems exam?

The official PSI Arizona ROC CR-41 Septic Tanks and Systems content outline lists 60 multiple-choice questions with 150 minutes allowed.

What passing score is required for the AZ ROC CR-41 exam?

A minimum passing score of 70% (70 correct answers out of 100) is required to pass the trade exam.

Is the Arizona ROC CR-41 Septic Systems exam open book?

Yes, the examination is open-book. Approved references—such as ADEQ Title 18 Chapter 9 regulations, ADEQ Engineering Bulletin No. 12, and OSHA 29 CFR 1926 standards—may be brought into the PSI test center.

What topics carry the highest weight on the CR-41 septic exam?

Soil Absorption Fields & Leach Lines carries 20% of the exam, Septic Tank Sizing & Construction carries 18%, ADEQ Regulations & Permits carries 15%, and Site Evaluation & Percolation Testing carries 15%.

Where can I schedule the AZ ROC CR-41 Septic Tanks and Systems exam?

Examinations are scheduled online through PSI Services LLC at https://test-takers.psiexams.com/azcon or by contacting PSI candidate services.