The Sewage Plant Operations Supervisor Passbook® prepares you for your test by allowing you to take practice exams in the subjects you need to study. It provides hundreds of questions and answers in the areas that will likely be covered on your upcoming exam, including but not limited to: supervision; operation and maintenance of pumps, valves and related mechanical and electrical equipment; physics, chemistry and bacteriology as related to sewage treatment and disposal, including laboratory and field tests; practices and equipment used in the operation and maintenance of a sewage treatment plant; record keeping; and more.