Book updated Jun 2026.
In Oregon, the State Plumbing Board divides plumbing licenses into two types: Individual Licenses and Contractor Licenses. The main difference between an individual plumbing license and a contractor plumbing license in Oregon is the scope of responsibilities and the ability to enter into contracts directly with clients. An individual plumber license holder primarily works under a licensed contractor, whereas a plumbing contractor license allows the licensee to operate a plumbing contracting business and take on larger projects independently. In any case, Journeyman Plumber License holders may perform all plumbing installations, alterations, or remodels.
We create these self-practice test questions module referencing the concepts and principles currently valid in the written exam. Each question comes with an answer and a short explanation which aids you in seeking further study information. We want to make sure these questions are tough enough to really test your readiness and draw your focus to the weak areas. Think of these as challenges presented to you so to assess your comprehension of the subject matters. The goal is to reinforce learning, to validate successful transference of knowledge and to identify areas of weakness that require remediation.
