The Heavy Equipment Mechanic 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: operation, maintenance and repair of automotive, truck and heavy highway equipment; tools and test equipment used in the maintenance of motor vehicles; maintenance and repair of gasoline and diesel engines; and other related areas.