Through multiple-choice questions, this guide tests at various levels the skills and knowledge required by laboratory analysts working at wastewater treatment plants. The guide contains more than 400 questions and answers, on 19 different topics, chosen to sample many aspects of an analyst's job. Each answer is accompanied by a page-specific reference to direct students to sources of additional information. Detailed solution sets are provided for answers requiring mathematical computation. The guide doubles as a valuable reference tool for laboratory analysts during examination preparation and on a day-to-day basis. It includes a list of the formulas used in a wastewater treatment plant laboratory including conversion factors and a detailed list of abbreviations and acronyms, a 220-term glossary, a comprehensive reference list, a table of elements, and tables of approved methods.