Book updated 2020. We create these self-practice test questions module (with 120+ questions) referencing both the requirements set forth in the adopted IPC as well as some state specific information currently valid in the plumbing trade. The focus is on code compliance - an answer can be correct only if it does not violate the code. Each question comes with an answer and a short explanation which aids you in seeking further study information. For purpose of exam readiness drilling, this product includes questions that have varying numbers of choices. Some have 2 while some have 6 or 7. We want to make sure these questions are tough enough to really test your readiness and draw your focus to the weak areas. You should use this product together with other study resources for the best possible exam prep coverage.