Who is this book for? This book is for anyone studying for the Grade 1 or Grade 2 , Water Distribution Operator Certification Exam. It's intended for newer operators, who are pursuing the first two certification levels. What's inside this book? This book contains three full-length practice tests that will help operators and students prepare for the Water Distribution Operator Certification Exams. Each practice exam contains 100 questions, which test your knowledge of water distribution concepts, and your ability to solve relevant math problems. There are a total of 300 questions in this book. The book includes an answer key for all 3 exams. It also contains step-by-step solutions for the math problems. If you're preparing to take the operator certification test, this book is a helpful study guide. Topics Covered in Book Water Math, Disinfection, Corrosion, Storage Facilities, Water Mains, Wells, Pumps, Valves, Hydrants, Fittings, Water Meters, Backflow, Service Connections, Drinking Water Regulations, Hydraulics, Safety, Sampling, Water Quality, Water Sources, Operations, Maintenance, Leak Detection, Disinfection By-products, and System Maps and Layout