The Electro-Mechanical Examination (U.S.P.S.) 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: basic math knowledge; fundamentals of gears; electricity; electronic terms and symbols; understanding and interpreting written material; identification and proper use of tools; electronic equipment; safety; fundamentals of electrical measurements; and other related areas.