The exposure switch should be fixed within the control booth and positioned at least how far from any opening?

The correct answer is determined by safety guidelines established to protect the operator from radiation exposure during imaging procedures. The requirement for the exposure switch to be fixed within the control booth and positioned at least 30 inches from any opening in the booth is grounded in radiation safety protocols. This distance helps ensure that the operator is adequately shielded from direct or scattered radiation while still maintaining control over the imaging process.

By maintaining this minimum distance, the risk of radiation exposure to the operator is minimized, allowing them to safely manage the equipment while also ensuring that they are not located in a position where they might be within the radiation path during an exposure. This practice aligns with safety regulations aiming to protect healthcare workers and maintains best practices in radiologic procedures.