100+ Free DC Plumber Practice Questions
Pass your District of Columbia Journeyman Plumber License Exam exam on the first try — instant access, no signup required.
Loading questions...
Key Facts: DC Plumber Exam
70%
Passing Score
DCRA
~80
Questions
3-hour limit
~$305
Exam Fee
PSI/DCRA
IPC
Code Base
DCRA adoption
DC's journeyman plumber exam is based on the IPC and administered by PSI under DCRA. The exam has approximately 80 questions with a 3-hour time limit and requires 70% to pass. DC's dense urban environment means emphasis on multi-story plumbing, backflow prevention, and grease interceptor installations.
About the DC Plumber Exam
The DC journeyman plumber exam is administered by PSI under the DCRA. It tests IPC knowledge including drainage systems, water supply, venting, gas piping, fixtures, and DC-specific code amendments for urban plumbing installations.
Questions
80 scored questions
Time Limit
3 hours
Passing Score
70%
Exam Fee
~$305 (DC Department of Consumer and Regulatory Affairs (DCRA))
DC Plumber Exam Content Outline
Drainage & Waste Systems
Drain sizing, fixture units, slope requirements, cleanouts, and building sewer connections per IPC
Water Supply & Distribution
Pipe sizing, backflow prevention, water heaters, pressure regulation, and cross-connection control
Venting Systems
Vent sizing, wet venting, air admittance valves, vent termination, and circuit venting per IPC
Gas Piping
Gas pipe sizing, appliance venting, pressure testing, BTU calculations per IFGC
Fixtures, Materials & Code Administration
Fixture installation, materials, joints, permits, inspections, and DC-specific requirements
How to Pass the DC Plumber Exam
What You Need to Know
- Passing score: 70%
- Exam length: 80 questions
- Time limit: 3 hours
- Exam fee: ~$305
Keys to Passing
- Complete 500+ practice questions
- Score 80%+ consistently before scheduling
- Focus on highest-weighted sections
- Use our AI tutor for tough concepts
DC Plumber Study Tips from Top Performers
Frequently Asked Questions
What code does DC use for the plumber exam?
DC uses the International Plumbing Code (IPC) with DC-specific amendments enforced by DCRA. The exam covers IPC provisions for drainage, venting, water supply, gas piping, and fixture requirements.
Who administers the DC plumber exam?
The exam is administered by PSI on behalf of the DC Department of Consumer and Regulatory Affairs (DCRA). Candidates must apply through DCRA and schedule with PSI after approval.
How many questions are on the DC plumber exam?
The DC plumber exam has approximately 80 multiple-choice questions with a 3-hour time limit. A score of 70% or higher is required to pass.
Is the DC plumber exam open book?
Yes, PSI-administered plumber exams typically allow a bound copy of the adopted IPC. No loose papers, handwritten notes, or electronic devices are permitted. Check with DCRA for approved reference materials.