Title: DeWalt HVAC Technician Certification Exam Guide
Product review: This book is a convenient way to practice exam questions but is limited in the number of questions. It has no references to help you understand the questions (ie formulas or calculations). The CD provided with the book for practice exams has several errors. For instance, there was one question with the exact same answer for two of the choices. There were two questions that left out pertinent information needed to calc the answer. One of the questions, (#46 math)did not even ask you a question to answer.DEWALT HVAC Technician Certification Exam Guide
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