Journeyman Plumber

Both code knowledge and practical installation judgment. The largest share of questions covers drainage, waste, and vent systems, followed by water supply, code and regulations, fixtures, plan reading and math, fuel gas, water heaters, and safety. Many items are scenario-based, asking you to identify a code violation or size a component.

Those figures vary by jurisdiction and change periodically, so there is no reliable single answer. Your state or local licensing authority publishes the current question count, time limit, and format in its candidate handbook. Check that handbook before you plan your test-day pacing.

Passing scores are set by the licensing body, and many jurisdictions use a scaled rather than a raw percentage. The official candidate handbook states the current requirement. Aim well above the minimum on practice tests, since scale conversions can make a comfortable raw score feel tighter than expected.

Most candidates find the exam harder than the day-to-day work because it demands code navigation speed and calculation accuracy under time pressure, not just familiarity with pipe. People with solid field experience but weak code-book skills often struggle most. Treat the code book as a tool you must be able to use quickly.

Usually yes, but waiting periods, retake fees, and limits on attempts are set locally and differ widely. Some jurisdictions require a waiting period or a remedial course after multiple failures. Confirm the retake rules with your licensing authority before your first attempt so you know your options.

No. Study by system and learn to navigate the book fast. Tab the chapters you will use most, practice looking up venting, sizing, and fixture requirements, and drill the tables you will actually need. Cover-to-cover reading burns time you could spend on indexed lookup practice and calculation reps.

Slow code lookup, weak pipe-sizing and fixture-unit math, and misreading scenario questions that ask for the exception rather than the general rule. Another frequent problem is studying only one domain, usually the one they work in daily, and neglecting water heaters, fuel gas, or plan reading until too late.

Schedule once your application and documented hours are approved, and leave a few weeks of buffer for processing. Availability varies by testing center and season. Book only after you consistently score above the target on full-length practice exams that mix every domain.

Many jurisdictions allow a reference copy, often with restrictions on loose papers, tabs, or handwritten notes, and some provide the code or restrict it entirely. The rules are set locally and are stated in the candidate handbook. Read them carefully, because bringing a prohibited annotated book can end your attempt.

Usually not automatically. Licenses are issued by state or local authorities, and most require you to apply, document hours, and often pass that jurisdiction's exam, which may cover a different code edition. Some states have reciprocity agreements. Check with the licensing board in the state you are moving to.