Radiation Health and Safety Exam 2025

When taking a panoramic radiograph of an obese patient, as compared to a slim patient, exposure (kVp or mA) should - Correct Ans-to be increased The major disadvantage of the bisecting angle technique is that - Correct Ans-Image distortion is more likely The reduce cross - contamination during radiography, the CDC and ADA recommended that the operators do all of the following EXCEPT - Correct Ans-Take complete medical histories Ideally, a lead apron would be used - Correct Ans-For any dental radiographs A full mouth radiographic series has just been processed manually. The operator notes that the films on the button of the rack are of different density. What could have caused this? - Correct Ans-Solutions were not stirred before processing A film that has been exposed to scattered radiation will appear - Correct Ans-Fogged X-ray exposure time should be increased if the patient is - Correct Ans-A large adult Before exposing a panoramic radiograph on a patient, the operator should request the removal of all of the following EXCEPT: - Correct Ans-Watch A parent refuses for i have radiographs taken on his/her child. The dental assistant should - Correct Ans-Inform the dentist and document Parent's refusal Incorrect horizontal angulation of the primary beam produces - Correct Ans-Overlapping of proximal surfaces Where is the radiographic landmark incisive foramen usually located - Correct Ans-Maxillary anterior Cephalometric radiographs are primarily indicated to evaluate - Correct Ans-Jaw relationships When taking a panoramic radiograph, the patient's head should be oriented - Correct Ans-with the midsagittal plane perpendicular to the floor Which of the following is MOST likely to contribute to the fogging of x - ray film - Correct Ans-light leaks in the dark room Which of the following conditions will result in a radiographic image that is too light? - Correct Ans-Weak developing solution The purpose of using film - holding devices when taking intraoral radiographs is to - Correct Ans-Assist in correct film placement A film with thin density and a herringbone pattern across it is the result of: - Correct Ans-Film packet reversal A full mouth radiographic survey has just been processed manually. The top films on the processing rack have a straight, clear border on the upper edge. This error is caused by - Correct Ans-Too low a level of developer solution Using a faster speed film requires - Correct Ans-shorter exposure time The life expectancy of radiographic processing solution depends upon all of the following EXCEPT - Correct Ans-temperature of the solution Insufficient washing of processed radiographic film will result in a - Correct Ans-Brownish - yellow stain on the radiograph A radiograph turns brown over time. The MOST likely cause is - Correct Ans-Under washing When processing a radiograph, the darkroom overhead light was off, the safety light was on, and the door was slightly open. What effect will exposure to minor amounts of room light have on the processed radiograph? It will appear - Correct Ans-Black Density of a radiograph is controlled by all of the following EXCEPT - Correct Ans-OFD [[object film distance]] Which method is considered MOST effective for handling and processing radiographs to prevent microbial contamination? - Correct Ans-cover with barrier envelopes A person exposing x-rays can BEST be protected from scattered radiation by - Correct Ans-standing behind a lead barrier Radiographs mounted with the raised portions of the dots toward the observer (labial mounting) are examined as though the observer is - Correct Ans-Outside the mouth looking in A film accidentally exposed to white light between developing and fixing will appear - Correct Ans-dark Stirring the developing and fixing solutions before manually processing films will - Correct Ans-Provide uniform concentrations If there is no teeth to serve as guides, which of the following landmarks indicate a maxillary molar area radiograph - Correct Ans-Tuberosity Which of the following materials is MOST resistant to the penetration of ionizing radiation? - Correct Ans-Lead In which radiographic technique is the patient positioned in a device to support his chin? - Correct Ans-Panoramic What is the major advantage in using the highest speed film and higher Kilovoltage (kV) - Correct Ans-Reduces the radiation to patient The best way to correct a cone cutting error is to - Correct Ans-Adjust film position If all known radiation safety precautions are exercised, an operator who is pregnant can safely expose radiographs during the operator's - Correct Ans-entire pregnancy Should the exposure time change when radiographing an edentulous adult patient versus an adult patient with a full dentition? - Correct Ans-yes, its decrease If a dental auxiliary's radiation badge report indicates exposure to small amounts of radiation, what should be done first? - Correct Ans-evelauate the xray equipment and techniques In dental radiography, it is necessary to have a filter to - Correct Ans-eliminate the less penetrating x-rays from the primary beam The BEST radiograph to choose to evaluate a suspected sublingual salivary duct obstruction is - Correct Ans-Occlusal What information helps to distinguish maxillary molar radiographs from mandibular molar radiographs - Correct Ans-The outline of the maxillary sinus is visible