California Registered Dental Assistant (RDA) Written Practice Exam 2024 - Free RDA Practice Questions and Study Guide.

Portable equipment, such as curing lights and nitrous oxide machines, are typically placed in the static zone during dental procedures. This zone is designated for equipment that is not in direct contact with the patient, such as x-ray machines and hand-held devices. The transfer zone is used for items that are passed between the dental team members, the operator zone is for the dentist performing the procedure, and the assistants zone is for dental assistants to work closely with the operator. Therefore, options A, B, and C are incorrect as they do not accurately reflect the placement of portable equipment during dental procedures.