The Assistant Director of Maintenance (Sewer District) 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: Inspection, operation, maintenance and repair of basic mechanical equipment including tools of the trade; Organizing data into tables and records; Inspection, operation, maintenance and repair of basic electrical equipment including tools of the trade; Administrative supervision; and more.