Book updated Apr 2021. PSI administers the open book building contractor exam in North Carolina. Our study notes focuses on the relevant business & law topics, structural concepts, building material and safety procedures. You should use this book together with other reference books for the best possible preparation outcome. An OPEN BOOK exam needs not be easy. If you do not know the concepts and facts, you will have a hard time searching for the right information. And if you need to browse through pages to look for an answer every time a new question is encountered, you will run out of time pretty fast. To succeed, you must learn enough so you can handle most questions on the spot. In case you have no choice but to search through the books you should make yourself capable of finding the needed information as quick as possible.