The Maintenance 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: inspection, operation, maintenance and repair of basic electrical equipment; principles and practices of heating and ventilating systems; principles and practices of air conditioning and refrigeration; plumbing materials, installations and procedures; reading and interpretation of plans and specifications; and more.