"The Revenue Equipment Maintainer 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: electronic and electrical theory; the maintenance, troubleshooting and repair of electronic, electrical and mechanical equipment, including the selection and use of required tools and testing devices; reading and interpreting schematics; safe work practices, including first-aid procedures; and more." --Amazon.com.