The Structure Maintainer, Group E (Plumbing) Passbook® prepares you for your test by allowing you to take practice exams in the subjects you need to study. It provides hundreds of questions and answers in the areas that will likely be covered on your upcoming exam, including but not limited to: plumbing supplies and materials; proper and efficient use of tools; safe plumbing procedures and the plumbing code; reading and interpreting blueprints, schematics and technical drawings related to the plumbing trade; and more.