The Structure Maintainer, Group H (Air Conditioning & Heating) 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: The maintenance, repair and overhaul of boilers and boiler sections, furnaces, air-conditioners, compressors, condensers, evaporators, fans, motors, electrical and electronic controls and valves, heaters, radiators, pumps and piping; Proper use of tools and equipment; Reading and interpreting sketches and drawings; Mathematical computations; and more.