The Refrigerating Machine Mechanic 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: operation, maintenance and repair of pumps, motors, valves, mechanical and electrical equipment; reading and interpretation of plans and specifications; inspection, operation, maintenance and repair of basic mechanical equipment; tools of the trade (mechanical); principles and practices of air conditioning and refrigeration; and more.