5The Oiler 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: lubrication and maintenance of electro-mechanical power plant, pumping and construction equipment; proper application of lubricating greases and oils; proper use of tools and lubricating devices; safety; reports; and more.