Final answer:
The radiographer should stand at a 90 degree angle to the beam during a mobile unit radiographic examination to minimize exposure to scatter radiation.
Step-by-step explanation:
When performing a mobile unit radiographic examination, the radiographer should stand at a 90 degree angle to the beam. This is the safest position to minimize exposure to scatter radiation. It is crucial to adhere to safety protocols to ensure that the radiographer is protected while conducting the examination.
When considering other angles mentioned, like 45 degree or 30 degree, these do not provide the same level of safety as standing perpendicular (90 degree) to the beam's direction. Therefore, option D, 90 degree, is the correct answer.
When performing a mobile unit radiographic examination, the radiographer should stand at a 45-degree angle to the beam. This is to ensure that the radiographer is positioned out of the path of the radiation beam and minimize their exposure to radiation.