The Power Plant Operator 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: reading comprehension and basic mathematics; tools, mechanical aptitude, and the reading of scales and gauges; operation, maintenance and repair of pumps, motors, valves, electrical and mechanical equipment; elementary hydraulics and water pumping operations; operation and maintenence of diesel engines; and more.