9The Custodian Passbook(R) 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: building cleaning; keeping simple inventory records; ability to read and follow written instructions; use and care of equipment, materials and supplies; knowledge of cleaning chemicals; sanitation; and other related areas.