The North Carolina Contractors Guide to Business and Project Management for Plumbing, Heating, and Sprinklers Online Exam Prep takes you through each one of the reference books that the exam is based on showing you exactly what to highlight. After your highlighting is completed with each book, you have the option take an online practice test to reinforce concepts presented. The highlighting guides and quizzes are designed to familiarize students with testing materials. We do not provide students with exact test questions, as the state does not release this information. @HomePrep is a National Leader in online education. With over 100,000 satisfied students and a course catalog of over 1,000 classes, we are here to help you – Invest in Yourself.