When you need to pass an apprentice, journeyman, contractor, or master licensing plumbing exam, the DEWALT PLUMBING LICENSING GUIDE, 3E is a great resource. This latest edition uses the same powerful formula that made previous editions so successful - an interactive CD that simulates actual exams and comprehensive content that contains over 500 practice questions. It also includes test-taking strategies, exam rules, as well as answer keys so you can get immediate feedback as you test your knowledge of the guide's key topics. Now updated to reflect the 2009 International Plumbing Code, you can expect a more current, more effective exam preparation than ever before. Check out our app, DEWALT Mobile Pro™. This free app is a construction calculator with integrated reference materials and access to hundreds of additional calculations as add-ons. To learn more, visit dewalt.com/mobilepro. Looking for online exam prep products? Check out DEWALT Contractor's Exam Preparation at dewalt.com/examprep and gain instant access to licensing exam preparation specifically created for the building trades.