100+ Free AZ ROC R-37 Plumbing & Solar Practice Questions
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Key Facts: AZ ROC R-37 Plumbing & Solar Exam
100 Questions
R-37 Question Count
PSI R-37 content outline
240 Minutes
R-37 Time Limit
PSI R-37 content outline
30 Questions / 75 Minutes
R-37 Solar Exam
PSI R-37 content outline
70% on each exam
Passing Score
PSI R-37 content outline
$116 for two exams; $40 solar-only
Trade Exam Fee
roc.az.gov/licensing-fees
$61
Statutes and Rules Exam Fee
roc.az.gov/licensing-fees
Arizona ROC R-37 requires two PSI examinations - R-37 (100 questions / 240 minutes) and R-37 Solar (30 questions / 75 minutes) - each open book at a 70% passing score. PSI lists $116 for two examinations and $40 for the solar portion only. This free bank is an English-language multiple-choice study aid weighted to the official PSI subject areas including the solar component; it is not the official exam and does not reproduce PSI items.
Sample AZ ROC R-37 Plumbing & Solar Practice Questions
Try these sample questions to test your AZ ROC R-37 Plumbing & Solar exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.
1Per the International Plumbing Code (IPC) as adopted in Arizona, what is the maximum static water pressure allowed at a plumbing fixture before a pressure reducing valve (PRV) must be installed?
2A contractor is calculating total Water Supply Fixture Units (WSFU) for a home containing 1 bathroom group with a tank-flush water closet (2.5 WSFU), a lavatory (1.0 WSFU), a shower (2.0 WSFU), plus 1 kitchen sink (1.5 WSFU). What is the total WSFU load?
3Water is being pumped upward to a fixture location 40 feet above the main supply line elevation. Assuming no pipe friction losses, what is the static pressure drop due to elevation alone?
4When sizing a water supply service pipe using the standard IPC developed length sizing method, what percentage allowance is standardly added to the measured length of pipe to account for friction loss through fittings and valves if exact fitting losses are not itemized?
5Which backflow prevention assembly is required for high-hazard cross-connections subject to continuous backpressure or backsiphonage, and requires an air gap drain discharge line that must never be submerged?
6What is the minimum physical air gap required between the outlet of a potable water faucet spout and the flood level rim of a lavatory when the faucet outlet is 1/2 inch in diameter and not affected by nearby side walls?
7What is the maximum horizontal hanger support spacing required for PEX tubing sizes 1 inch and smaller per the International Plumbing Code?
8A Double Check Valve Assembly (DCVA) is suitable for installation under which of the following cross-connection hazard conditions?
9When installing a potable water thermal expansion tank on a domestic hot water system equipped with a check valve backflow preventer, at what pressure should the tank's internal air bladder be pre-charged prior to installation?
10A Pressure Vacuum Breaker (PVB) installed on a residential irrigation main must be elevated at least how many inches above the highest downstream sprinkler head or outlet?
About the AZ ROC R-37 Plumbing & Solar Exam
The Arizona ROC R-37 Plumbing, Including Solar (Residential) Examination is the open-book PSI trade examination for the Arizona Registrar of Contractors R-37 classification, whose scope includes all R-37R residential plumbing work plus solar applications. Candidates sit two examinations: the 100-question, 240-minute R-37 exam over 13 subject areas, and a separate 30-question, 75-minute R-37 Solar exam. Both require 70% to pass. 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.
Assessment
R-37 covers the full R-37R residential plumbing scope across 13 subject areas, and adds a second 30-question R-37 Solar examination (Pumps and Storage 6, Open and Closed Loop 5, Pipes and Materials 5, System Designs 5, Collectors 3, Controls 3, Estimating and Sizing 2, Pool Systems 1). Code questions use the 2018 IPC, 2018 IFGC, 2018 IMC and NFPA 13/13D/13R.
Time Limit
240 minutes
Passing Score
70%
Exam Fee
$116 for two examinations; $40 for the solar portion only (Arizona ROC / PSI Services LLC)
AZ ROC R-37 Plumbing & Solar Exam Content Outline
Drainage Waste and Vents
Building drains and branch drains, DFU loading, slope, cleanouts, stack and vent sizing, wet and common venting, air admittance valves, and trap-arm limits.
Water Supply Systems
Water service and distribution sizing by WSFU, static head and friction loss, approved materials and joints, valves, supports, and system disinfection.
General Knowledge and General Regulations
Permits and inspections, approved materials and listings, workmanship, rough and final testing, and Arizona contractor regulations.
Fuel Gas
IFGC/NFPA 54 sizing tables, appliance shutoff valves, sediment traps, CSST bonding, combustion air, vent categories, and gas pressure testing.
Septic and Sewer
Building sewer materials and sizing, on-site wastewater treatment under Arizona Administrative Code Title 18 Chapter 9, tank and disposal-field siting, and setbacks.
Plumbing Fixtures (including water heaters and accessibility)
Fixture clearances and rough-in, water closets, tubs and showers, 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 testing 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.
R-37 Solar: Pumps and Storage Systems
Circulation pumps, PV-powered and AC pumps, storage tank selection and sizing, heat exchangers, and stagnation protection.
R-37 Solar: Open and Closed Loop Systems
Direct (open loop) versus indirect (closed loop) designs, drainback and antifreeze systems, freeze and overheat protection.
R-37 Solar: Pipes and Materials
Approved solar loop piping and insulation, expansion, dissimilar-metal isolation, and roof penetration flashing.
R-37 Solar: System Designs
Thermosiphon, ICS/batch, active and passive designs, backup water heating, and integration with the potable system.
R-37 Solar: Collectors
Flat-plate, evacuated-tube and unglazed pool collectors, orientation and tilt, mounting and array layout.
R-37 Solar: Controls
Differential temperature controllers, sensors, high-limit and freeze controls, and tempering valves.
R-37 Solar: Estimating and Sizing
Collector area and storage volume sizing, solar fraction, and load estimating.
R-37 Solar: Pool Systems
Solar pool heating loops, unglazed collector circuits, and pool plumbing tie-ins.
How to Pass the AZ ROC R-37 Plumbing & Solar Exam
What You Need to Know
- Passing score: 70%
- Assessment: R-37 covers the full R-37R residential plumbing scope across 13 subject areas, and adds a second 30-question R-37 Solar examination (Pumps and Storage 6, Open and Closed Loop 5, Pipes and Materials 5, System Designs 5, Collectors 3, Controls 3, Estimating and Sizing 2, Pool Systems 1). Code questions use the 2018 IPC, 2018 IFGC, 2018 IMC and NFPA 13/13D/13R.
- Time limit: 240 minutes
- Exam fee: $116 for two examinations; $40 for the solar portion only
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-37 Plumbing & Solar Study Tips from Top Performers
Frequently Asked Questions
How many questions are on the Arizona ROC R-37 exam?
Two exams: R-37 has 100 scored questions in 240 minutes and R-37 Solar has 30 scored questions in 75 minutes, per the PSI R-37 content outline.
What is the passing score for the AZ ROC R-37 exam?
70% on each examination. The R-37 and R-37 Solar parts are scored separately, and the Arizona Statutes and Rules Exam is a further separate requirement.
How is R-37 different from R-37R?
R-37 covers everything in R-37R and adds solar applications, so R-37 candidates also sit the 30-question R-37 Solar examination. The main 100-question content outline is otherwise identical.
Which references may I bring to the R-37 exam?
PSI lists the 2018 IPC, 2018 IFGC, 2018 IMC, NFPA 13/13D/13R, Arizona Administrative Code Title 18 Chapter 9, Mathematics for Plumbers and Pipefitters, IPT's Pipe Trades Handbook and 29 CFR 1926, all bound and tabbed with permanent tabs only.
Which reference covers the R-37 Solar exam?
The 2018 International Plumbing Code is the only reference allowed in the room for R-37 Solar; the Florida Solar Energy Center Solar Water and Pool Heating Design and Installation Manual is listed as study material that is NOT allowed in the examination center.