The Duplicating Machine Operator 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: Operation and maintenance of duplicating machines and related equipment; Mechanical reasoning; Understanding and interpreting written material; Arithmetic reasoning and computations; Clerical aptitude; and more.