Maintenance Supervisor (Car Equipment) - Paperbackby Passbooks (Compiled by) The Maintenance Supervisor (Car Equipment) 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: inspection, maintenance and repair of multiple unit cars, service cars and locomotives; supervisory methods and techniques;