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Key Facts: OR Plumber Exam
70%
Passing Score
Building Codes Division
100
Questions
3 hours
~$100+$265
Exam Fee
PSI
OSPC (based on UPC)
Code
Building Codes Division
Oregon's journeyman plumber exam is administered by PSI on behalf of the Building Codes Division. It has approximately 100 questions with a 3 hours time limit and requires 70% to pass. The exam fee is ~$100+$265. Oregon uses the OSPC (Oregon Specialty Plumbing Code, based on UPC) as its plumbing code.
Sample OR Plumber Practice Questions
Try these sample questions to review concepts for the OR Plumber exam. Each question includes a detailed explanation. Start the interactive quiz above for the full 298+ question experience with AI tutoring.
1Oregon uses the Oregon Specialty Plumbing Code (OSPC), which is based on which national plumbing code?
2Under Oregon's OSPC, what is the minimum size drain pipe for a water closet?
3According to Oregon's Building Codes Division, who administers the journeyman plumber licensing exam?
4Under Oregon's OSPC, what is the minimum slope for a 4-inch horizontal drainage pipe?
5Per Oregon's OSPC, what is the fixture unit value for a residential water closet (1.6 GPF or less)?
6Under Oregon's OSPC, what is the minimum trap seal depth?
7Per Oregon's OSPC, what is the maximum distance a 1-1/2 inch P-trap can be from its vent?
8Under Oregon's OSPC, what type of backflow preventer is required for a high-hazard cross-connection?
9Per Oregon's OSPC, what is the minimum vent pipe size?
10In Oregon, what is the maximum static water pressure permitted in a building distribution system per the OSPC?
About the OR Plumber Exam
Oregon-specific journeyman plumber licensing exam based on the OSPC (Oregon Specialty Plumbing Code, based on UPC) covering drainage, water supply, venting, gas piping, and fixtures
Exam sponsor: Building Codes Division / PSI. The requirements and fees below concern the certification or admission exam, separate from our free practice resources.
Questions
100 questions
Time Limit
3 hours
Passing Score
70%
Reported exam pass rate: ~50%. This describes exam candidates, not OpenExamPrep users or results from using our resources. Exam sponsor website
Fees, eligibility, and exam policies can change. Confirm them with the exam sponsor before applying or paying.
Official sources
Our practice resources: topics covered
We aim to reflect publicly available exam outlines and topic information in our study resources. Coverage, format, and difficulty may differ from the actual exam, and we cannot guarantee that every detail is accurate or current. Confirm exam requirements, fees, and policies with the official exam sponsor.
Drainage Systems & Pipe Sizing
Drain sizing, fixture units (DFU), slope requirements, cleanouts, building drain and sewer sizing per OSPC (based on UPC)
Water Supply & Distribution
Pipe sizing, backflow prevention, pressure regulation, cross-connection control, and water service requirements
Venting Systems
Vent sizing, wet venting, air admittance valves, vent termination, circuit venting, and combination waste and vent
Fixtures & Appliances
Fixture installation, clearances, water heaters, accessible fixtures, and commercial fixture requirements
Gas Piping
Gas pipe sizing, appliance venting, pressure testing, BTU calculations, CSST bonding, and combustion air
Code Administration & Special Systems
Permits, inspections, plan review, Oregon state amendments, medical gas, grease interceptors, and storm drainage
Preparing for the OR Plumber Exam
What You Need to Know
- Passing score: 70%
- Exam length: 100 questions
- Time limit: 3 hours
- Exam / certification fees: ~$100+$265 Official sources
Using Our Practice Resources
- Work through all 298 available questions
- Review every answer and explanation
- Track weak areas and revisit them
- Use our AI tutor for tough concepts
OR Plumber: Suggested Study Strategy
Frequently Asked Questions
What plumbing code does Oregon use?
Oregon uses the OSPC (Oregon Specialty Plumbing Code, based on UPC) for its plumbing licensing exam. Candidates should study the current adopted edition with any state-specific amendments.
Who administers the Oregon plumber exam?
The exam is administered by PSI on behalf of the Building Codes Division. Register through PSI after your application is approved.
What is the passing score?
Oregon requires 70% to pass the journeyman plumber exam. The exam has 100 questions with a 3 hours time limit.
Is the exam open book?
Most PSI-administered plumbing exams allow a bound copy of the adopted plumbing code. No loose pages, handwritten notes, or electronic devices are permitted. Check current exam policies before your test date.