Which of the following are requirements for mobile X-ray equipment exposure switches?

The requirement for mobile X-ray equipment exposure switches to be a "dead man type" is critical for ensuring operator safety during radiographic procedures. A dead man switch requires continuous pressure from the operator to maintain the exposure. This design helps prevent accidental exposure, as releasing the switch immediately stops the X-ray production. This feature is particularly vital in mobile radiography, where conditions may not always be fully controlled, and it allows for a quick response if the operator must move or address an unexpected situation.

While other options might also represent valid safety or operational features, the emphasis on the dead man switch is paramount in the context of keeping the operator safe and minimizing unintentional radiation exposure. Thus, while it is worthwhile to recognize the potential importance of other features such as distance from the patient or separating rotor and exposure functions, the requirement for a dead man switch is the key focus in ensuring safety and effective operation in mobile X-ray equipment.