The Mechanical Maintainer-Group B 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: Knowledge of basic tools and machines used in repair, maintenance, inspection and alteration of elevators and escalators; Troubleshoot and locate electrical faults; Repair and replacement of elevator and escalator components; and more.