The Assistant Head Custodian 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: ability to read and follow written instructions; operation and maintenance of heating, ventilating and air conditioning systems; building cleaning; building operation and maintenance; keeping simple inventory records; supervision and training; and more.