100+ Free AZ ROC R-37R Plumbing Practice Questions
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Key Facts: AZ ROC R-37R Plumbing Exam
100 Questions
Official Question Count
PSI R-37R content outline
240 Minutes
Time Limit
PSI R-37R content outline
70%
Passing Score
PSI R-37R content outline
$66
Trade Exam Fee
roc.az.gov/licensing-fees
$61
Statutes and Rules Exam Fee
roc.az.gov/licensing-fees
13 Areas
Subject Areas
PSI R-37R content outline
The Arizona ROC R-37R Plumbing (Residential) Examination is 100 scored multiple-choice questions in 240 minutes, open book, with a 70% passing score and a $66 PSI exam fee. This free bank is an English-language multiple-choice study aid weighted to the official PSI subject areas; it is not the official exam and does not reproduce PSI items.
Sample AZ ROC R-37R Plumbing Practice Questions
Try these sample questions to test your AZ ROC R-37R Plumbing exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.
1What is the standard minimum slope required per foot for horizontal drainage piping with a diameter of 2 inches or less?
2In standard plumbing fixture unit tables, what Drainage Fixture Unit (DFU) load value is assigned to a standard residential water closet with a 1.6 gallons per flush gravity tank?
3What is the minimum diameter required for a trap arm serving a standard residential lavatory?
4According to the IPC, what is the maximum allowable horizontal distance from a fixture trap weir to its vent fitting for a 1-1/2 inch trap arm installed at a 1/4 inch per foot slope?
5A branch drain serves 2 water closets (3 DFUs each), 2 lavatories (1 DFU each), and 1 kitchen sink (2 DFUs). What total DFU load does this branch carry, and what minimum pipe size is required?
6To prevent siphoning of the trap seal, plumbing code dictates that the total vertical drop of a trap arm between the trap weir and the vent fitting connection must not exceed what value?
7What is the maximum allowable distance between cleanouts on a 4-inch horizontal drainage pipe inside or under a building?
8A 3-inch horizontal drain line runs a continuous length of 48 feet at a slope of 1/4 inch per foot. What is the total vertical drop of the pipe over this distance?
9Where a plumbing vent stack terminates through a roof, it must be located at least how far above or horizontally away from any operable door, window, or air intake?
10Under standard plumbing code requirements, a plumbing vent terminal extending through a flat roof must extend vertically above the roof surface by at least how many inches?
About the AZ ROC R-37R Plumbing Exam
The Arizona ROC R-37R Plumbing (Residential) Examination is the open-book, computer-delivered PSI trade exam for the Arizona Registrar of Contractors R-37R residential plumbing classification. Its official content outline runs 100 scored questions in 240 minutes at a 70% passing score across 13 subject areas, and code items are drawn from the 2018 International Plumbing Code, 2018 International Fuel Gas Code, 2018 International Mechanical Code, NFPA 13/13D/13R, and Arizona Administrative Code Title 18 Chapter 9. The R-37R trade exam is taken in addition to the mandatory Arizona Statutes and Rules Training Course and Exam (SRE).
Assessment
One 100-question open-book multiple-choice trade examination, 240 minutes, 70% to pass. Code questions are written to the exact editions named in the PSI R-37R reference list (International Plumbing Code 2018, International Fuel Gas Code 2018, International Mechanical Code 2018, NFPA 13/13D/13R, and Arizona Administrative Code Title 18 Chapter 9).
Time Limit
240 minutes
Passing Score
70%
Exam Fee
$66 (Arizona ROC / PSI Services LLC)
AZ ROC R-37R Plumbing Exam Content Outline
Drainage Waste and Vents
Building drains, branch drains, DFU loading, drain slope, cleanouts, stack sizing, individual/common/wet venting, air admittance valves, and trap-arm limits.
Water Supply Systems
Water service and distribution sizing by WSFU, pressure loss and static head, approved pipe materials and joints, valves, hangers, and disinfection.
General Knowledge and General Regulations
Permits, inspections, approved materials and listings, workmanship, testing of rough and finished work, and Arizona contractor regulations.
Fuel Gas
IFGC/NFPA 54 gas pipe sizing tables, appliance shutoffs, sediment traps, CSST bonding, combustion air, venting categories, and gas pressure tests.
Septic and Sewer
Building sewer materials and sizing, on-site wastewater treatment under Arizona Administrative Code Title 18 Chapter 9, septic tank and disposal field siting, and setbacks.
Plumbing Fixtures (including water heaters and accessibility)
Fixture clearances and rough-in, water closets, showers and tubs, mixing valves and scald limits, water heater installation, T&P relief piping, and accessibility.
Backflow Prevention
Cross-connection hazard classes, air gaps, atmospheric and pressure vacuum breakers, DCVA and RPZ selection, and test/maintenance duties.
Roof Drains and Storm Drainage Systems
Roof drain and overflow sizing, rainfall-rate design, conductors and leaders, and separation of storm from sanitary drainage.
Specialty Plumbing, Interceptors, and Traps
Grease and sand interceptors, special-waste and indirect-waste receptors, trap seals and primers, and prohibited trap types.
Isometric Analysis
Reading and checking DWV and water-supply isometric drawings for correct fittings, fixture connections, vent takeoffs, and code compliance.
Fire Sprinklers
Residential sprinkler provisions referenced by NFPA 13, 13D and 13R, supply connections, and coordination with the domestic water system.
Excavation
Trenching and shoring under OSHA 29 CFR 1926 Subpart P, soil classification, pipe bedding and backfill, and Arizona 811 utility locates.
Indirect Waste
Indirect waste piping, required air gaps and air breaks, waste receptors, and appliance drains such as clothes washers and dishwashers.
How to Pass the AZ ROC R-37R Plumbing Exam
What You Need to Know
- Passing score: 70%
- Assessment: One 100-question open-book multiple-choice trade examination, 240 minutes, 70% to pass. Code questions are written to the exact editions named in the PSI R-37R reference list (International Plumbing Code 2018, International Fuel Gas Code 2018, International Mechanical Code 2018, NFPA 13/13D/13R, and Arizona Administrative Code Title 18 Chapter 9).
- Time limit: 240 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 R-37R Plumbing Study Tips from Top Performers
Frequently Asked Questions
How many questions are on the official Arizona ROC R-37R exam?
The PSI content outline for R-37R lists 100 scored multiple-choice questions with 240 minutes of testing time.
What is the passing score for the AZ ROC R-37R exam?
70%, which is 70 correct answers out of the 100 scored questions. The trade exam and the Arizona Statutes and Rules Exam are scored separately.
Which code editions does the R-37R exam use?
PSI writes R-37R code questions only to the editions in its reference list: the 2018 International Plumbing Code, 2018 International Fuel Gas Code, 2018 International Mechanical Code, and NFPA 13, 13D and 13R.
Is the R-37R exam open book?
Yes. Candidates bring their own bound references, which may be tabbed with permanent tabs and highlighted before the session but not written in during the exam.
What does R-37 include that R-37R does not?
R-37 Plumbing, Including Solar covers everything in R-37R plus solar applications, and R-37 candidates sit an extra 30-question, 75-minute R-37 Solar examination.