Exam Prep Hub
Plumbing Exam Prep.
Free practice tests and study guides covering water supply, drainage systems, and plumbing code to help you pass your journeyman or master plumber exam.
- 540Practice Questions
- 21Practice Tests (4 free)
About this Exam
The plumbing licensing exam tests your knowledge of water supply systems, drainage and vent systems, fixture installation, pipe sizing, and the applicable plumbing code. Most states require separate exams for journeyman and master plumber licenses, with the master exam covering more advanced sizing, design, and supervisory knowledge.
The Journeyman Plumber exam focuses on trade skills needed to perform plumbing work under the supervision of a licensed master plumber. Topics typically include supply piping materials and sizing, DWV (drain, waste, and vent) systems, fixture requirements, backflow prevention, and code compliance.
The Master Plumber exam covers the full scope of plumbing system design and installation, including advanced pipe sizing, water heater regulations, gas piping, medical gas, and the supervisory duties of a master plumber. Most states require a period of journeyman-level experience before a candidate may sit for the master exam.
ExamsLib provides free practice questions and study guides built around the subject areas most frequently tested on plumbing licensing exams, with clear explanations of the underlying code and trade principles.
What the Exam Covers
Core topic areas
Recommended Study Path
- 1
Learn the Ground Rules
Read the study guide and skim every topic page.
- 2
Drill Your Weak Topics
Work through topic quizzes and review the explanation behind every miss.
- 3
Simulate Test Day
Take timed, full-length practice tests until you pass consistently.
Popular Practice Tests
View All- Free
Free Plumbing Practice Test
Take our free plumbing practice test with 20 questions covering water supply, drainage and vent systems, and plumbing code. See your score instantly.
- Free
Plumbing Practice Exam 1: Foundations
Free 25-question plumbing practice exam covering water supply, drainage and venting, and plumbing code basics. Instant scoring with full explanations.
- Free
Plumbing Practice Exam 2: Foundations
Free plumbing practice test 2 at the foundations tier: WSFU, trap seals, DFU, and code essentials. Get your score plus a per-question explanation.
- Free
Plumbing Practice Exam 3: Foundations
Free plumbing practice exam 3 covering pipe sizing, vents, slope, and UPC and IPC basics. Twenty-five questions with instant scoring and explanations.
Pick Your License Tier
Every tier comes with a free, timed practice test and explanations for each answer.
Journeyman Plumber
The journeyman plumber exam tests trade skills including water supply systems, DWV installations, fixture requirements, pipe materials, and plumbing code compliance. Requirements vary by state.
Practice this examMaster Plumber
The master plumber exam covers advanced system design, pipe sizing, gas piping, backflow prevention, and the supervisory responsibilities of a licensed master plumber. Most states require proven journeyman experience before sitting for this exam.
Practice this exam
By state
State-specific exam pages
Licensing requirements, fees, and exam formats vary by state. Pick yours for local details.
Frequently asked questions
What topics are covered on the journeyman plumber exam?
Most journeyman plumber exams cover water supply piping materials and sizing, drain-waste-vent (DWV) systems, fixture installation requirements, backflow prevention, and plumbing code compliance. Exact content varies by state.
What is the difference between a journeyman plumber and a master plumber?
A journeyman plumber is licensed to perform plumbing work under the supervision of a master plumber. A master plumber holds the highest license level, can design and oversee plumbing systems, pull permits, and supervise journeymen. Most states require documented journeyman experience before sitting for the master exam.
What plumbing code is used on licensing exams?
Most states use the Uniform Plumbing Code (UPC) or the International Plumbing Code (IPC), sometimes with state-specific amendments. Confirm which code and edition your state uses before purchasing study materials. The two codes differ in terminology, table values, and some installation requirements.
How many questions are on a typical plumbing licensing exam?
Exam length varies by state and license level. Many journeyman plumber exams contain 60 to 100 questions. Confirm the exact format with your state licensing authority and the approved testing provider.
Is the plumbing exam open book?
Some states allow candidates to use the plumbing code book during the exam, while others administer a closed-book test. Check with your state licensing board for the current rules before your exam date.
"The best preparation for tomorrow is doing your best today."
H. Jackson Brown Jr.
