- The OR-JP written exam is 64 questions, open-book, with a 75% passing score in four hours.
- Application fee is $100; you have a 60-day window to sit for the exam once authorized.
- Six OAR 918-695-0040 domains cover drawings, math, tools, code/hydraulics, safety, and accessibility.
- Failing requires reapplication and at least a 30-day wait before retesting.
Quick Facts Snapshot
Before diving into domain content, keep this one-page reference nearby. The Oregon Journeyman Plumber License Exam (OR-JP) is administered under the Oregon Department of Consumer and Business Services, Building Codes Division (BCD), operating under authority of the State Plumbing Board. BCD approves testing locations and grades every exam submitted. If you want a deeper narrative walkthrough instead of a cheat sheet, pair this page with the OR-JP Study Guide 2026 for a full first-attempt strategy.
| Item | Detail |
|---|---|
| Certifying body | Oregon BCD, State Plumbing Board |
| License title | Journeyman Plumber (JP) |
| Application fee | $100 |
| Exam format | 64 questions, open-book, written |
| Time limit | 4 hours |
| Passing score | 75% |
| Authorization window | 60 days to sit for exam |
| Retake wait | At least 30 days after reapplication |
| Governing code | 2023 Oregon Plumbing Specialty Code (2021 UPC base) |
| Renewal cycle | Every 3 years, April 1 cycle, $180 with 24 CE hours |
The Six Exam Domains at a Glance
OAR 918-695-0040 lays out six subject areas for the exam. BCD does not publish a weighting scheme for these domains, so this cheat sheet reproduces them as listed rather than guessing at percentages. For an expanded topic-by-topic breakdown, see the OR-JP Exam Domains 2026 guide.
Domain 1: Drawings and Plans
Read engineering and architectural drawings well enough to prepare a bill of materials and lay out a plumbing system from the plan set.
- Symbol recognition on riser diagrams and floor plans
- Translating a plan into a materials takeoff
Domain 2: Math and Layout Calculations
Compute areas of regular plane figures, volumes of regular solids, slopes, offsets, clearances, and pipe weights - all without a programmable calculator.
- Offset and rolling offset formulas
- Grade/slope conversion for drainage runs
Domain 3: Tools, Materials, and Techniques
Select and apply tools, materials, and installation techniques commonly used in the plumbing trade across residential and commercial work.
- Matching fitting/material choice to application
- Joining methods for different pipe materials
Domain 4: Code, Rules, and Hydraulics
Apply the Plumbing Specialty Code, administrative rules governing plumbing and plumbers, and general scientific principles of hydraulics.
- Code section lookups under time pressure
- Basic hydraulic principles behind venting and drainage
Domain 5: Job Safety
General knowledge of construction job safety and occupational safety standards relevant to plumbing work sites.
- Trench, ladder, and confined-space awareness
- Standard jobsite hazard categories
Domain 6: Disabled Access Provisions
A basic understanding of disabled access provisions in the Oregon Structural Specialty Code as they relate to plumbing fixtures and clearances.
- Accessible fixture clearance and mounting height rules
- How structural accessibility code intersects with plumbing code
Struggling to judge how tough this mix actually is compared with other trade exams? Read How Hard Is the OR-JP Exam? Complete Difficulty Guide 2026 before you commit to a study timeline.
Eligibility Routes and Fee Mechanics
The path to sitting for the exam depends entirely on which eligibility route you follow. There is no shortcut around verified hours and education records, and the application itself requires both before BCD will authorize a testing date.
- Standard route: completion of an approved four-year Oregon apprenticeship.
- Equivalent route: 576 classroom hours plus 3,850 commercial and 3,850 residential work hours.
- Experienced licensed-plumber route: 7,700 commercial and 7,700 residential hours combined with an equivalent individual installer license.
Every applicant submits education records and verified work history alongside the $100 application fee. Once BCD authorizes you, the clock starts on a 60-day window to actually sit for the exam - miss it and you're back to reapplying. A full walkthrough of which documents satisfy each route lives in the OR-JP Requirements 2026 article.
Key Takeaway
Confirm your eligibility route and gather verified hour documentation before you pay the $100 fee - the 60-day authorization clock is unforgiving once it starts.
Exam-Day Format and Rules
The OR-JP exam is a 64-question, four-hour, open-book written test with a 75% passing score. "Open-book" does not mean unrestricted: the authorization letter BCD sends you controls exactly which references you may bring into the room. Bringing an unapproved reference, or leaving an approved one at home, can cost you time or points you didn't need to lose.
- Calculators must be silent, nonprogrammable, and nonprinting.
- Only the references named in your authorization letter are permitted - read that letter closely before test day.
- 75% is the fixed passing threshold; there is no domain-by-domain minimum published, so an overall score is what matters.
- A failed attempt means reapplying and waiting at least 30 days before you can retest.
For the exact math behind that 75% threshold and how many questions you can afford to miss, see OR-JP Passing Score 2026: Exactly What You Need to Pass. If you're planning around apprenticeship completion, work schedules, or license renewal timing, cross-check dates using OR-JP Exam Dates 2026.
Code Book and Reference Rules
The code currently governing the exam is the 2023 Oregon Plumbing Specialty Code, which is based on the 2021 Uniform Plumbing Code and took effect October 1, 2023. Every Domain 4 question about code sections, administrative rules, or hydraulic principles is measured against this edition - not an older UPC cycle you may have trained on in an apprenticeship program that hasn't updated its materials.
Because the exam is open-book within the limits of your authorization letter, speed with the index and table of contents of your code book matters as much as memorization. Candidates who haven't physically flagged frequently referenced sections - venting, trap sizing, fixture clearances, accessible fixture requirements - tend to lose time hunting during the four-hour window.
- Confirm you're studying the 2023 edition, not a superseded UPC cycle.
- Tab sections relevant to Domain 4 (code/hydraulics) and Domain 6 (accessible fixtures) before test day.
- Practice locating a code citation in under a minute - this is a timed exam, not a take-home test.
License Renewal Cycle
Passing the exam is not the finish line. Oregon Journeyman Plumber licenses renew every three years on an April 1 cycle. Renewal costs $180, which includes a $30 continuing-education tracking fee, and requires 24 approved continuing-education hours completed within the cycle. Building this into your long-term planning now - even before you sit for the initial exam - avoids a scramble later.
Last-Mile Review Schedule
In the final stretch before your authorized test date, structure review sessions around the six OAR domains rather than generic flashcard decks. This is the one place a study-methodology template earns its space here - because it's mapped directly to OR-JP's own content areas.
Drawings, Math, and Layout (Domains 1-2)
- Practice bill-of-materials extraction from sample plan sets
- Drill offset, slope, and volume formulas without a programmable calculator
Tools, Code, and Hydraulics (Domains 3-4)
- Review material selection scenarios across residential and commercial contexts
- Speed-drill code lookups in the 2023 Oregon Plumbing Specialty Code
Safety and Accessibility (Domains 5-6)
- Review general jobsite safety standards
- Study accessible fixture clearance and mounting rules under the Structural Specialty Code
Full Simulation and Reference Check
- Run a timed, 64-question mock exam under the four-hour limit
- Confirm your reference materials match your authorization letter exactly
Run realistic timed sets on our OR-JP practice test platform to get comfortable with the pacing before your authorized date arrives. The same site also offers domain-specific quizzes so you can drill weak areas identified during this four-week review.
Why the Details in This Cheat Sheet Matter
Contractors and plumbing companies hiring for journeyman-level positions in Oregon expect the JP license as a baseline credential, and it's tied directly to the state's regulatory framework rather than a private industry body. Understanding whether the investment of time and fees pays off for your career goals is worth a separate look - see Is the OR-JP Certification Worth It? Complete ROI Analysis 2026 and OR-JP Salary Guide 2026 for a fuller picture beyond the exam mechanics covered here.
If you're still early in your research and want foundational definitions before diving into cheat-sheet details, the companion pieces What Is OR-JP? and OR-JP Requirements 2026 are good starting points. You can also browse general OR-JP Jobs listings to see how the license connects to real hiring criteria in Oregon's construction market.
FAQ
The exam has 64 questions and a four-hour time limit, administered as a written, open-book test at BCD-approved locations.
You need 75% to pass. There is no separate published minimum per domain - it's an overall score requirement.
No. Only a silent, nonprogrammable, nonprinting calculator is permitted, and your authorization letter governs all other approved references.
You must reapply and wait at least 30 days before you're eligible to retest.
Study the 2023 Oregon Plumbing Specialty Code, based on the 2021 UPC, which has been effective since October 1, 2023.
Every three years on an April 1 cycle, at a cost of $180 (including a $30 CE tracking fee) and 24 approved continuing-education hours.