The HVAC Technician 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, maintenance and repair of pumps, valves, motors and other heating and electrical equipment; plans and specifications; principles of air conditioning and refrigeration; heating and ventilation systems; and other related areas.