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 opera
Who is this book for? This book is for anyone studying for the Grade 2 Water Distribution Operator Certification Exam. It's intended for newer operators. Grade
This book contains 4 full-length practice exams for water treatment certification. Each practice exam consists of 100 questions, which test the operator's knowl
This updated study guide follows the new requirements established by the ABC. It is organized by certification levels I, II, III, and IV. Questions are ranked f
This book was designed to help people pass their water treatment operator certification exams. This book contains 200 practice exam questions which translates a