商品簡介
Designed for wastewater operators and students trying to pass Grade 1 and Grade 2 certification exams, this guide covers all of the mathematics problems commonly encountered on the job. Giorgi has written many instructional guides for the American Water Works Association in the past, and he includes tutorials on common conversion problems, percent calculations, specific gravity, volume and density, statistical concepts and other types of calculations. Appendices include common conversion factors, summaries of wastewater treatment equations, chemistry tables, depth/diameter tables, wastewater flow chart diagrams and abbreviations. Annotation c2009 Book News, Inc., Portland, OR (booknews.com)
