The Equipment Mechanic 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: mechanical components and principles; electrical theory and cooling and heating systems; test, diagnose, and repair vehicle electric systems and accessories; components of combustion engines; vehicle and equipment operation and components; and more.