3The Admission Test Series prepares students for entrance examinations into college, graduate and professional school as well as candidates for professional certification and licensure. The Certified and Registered Central Service Technician (CRCST) Passbook(R) prepares you by sharpening the skills and abilities necessary to succeed on your upcoming entrance exam. It provides hundreds of questions and answers in the areas that will likely be covered on your upcoming exam, including but not limited to: cleaning, decontamination and disinfection; preparation and packaging; sterilization; medical equipment; documents and records; and more.