PRACTICE TEST FOR DANB # RHS 100% CORRECT

PRACTICE TEST FOR DANB # RHS 100% CORRECT Compared to a dentulous patient, radiographic exposure time on an edentulous adult patient should decrease Inside the film packet, the film is wrapped with a/an black paper sheet. Which of the following cells exposed to radiation may be associated with leukemia? Somatic Personnel monitoring for radiation exposure is done by wearing a dosimeter. For x-ray machines operating in ranges at or below 70 kVp, the total aluminum equivalent filtration must be a minimum of 1.5 mm. Film should be stored in its original lead-wrapped packaging. Prior to exposing dental radiographs on a visually impaired patient, the dental assistant should use touch to explain the equipment and procedure To assist the patient in controlling the gag reflex, the dental assistant should use a distraction technique. If a patient did not remove earrings prior to exposing a panoramic, the radiograph could have ghost images. Dental assistants exposing x-rays can best be protected from scatter radiation by standing behind a lead barrier. Which of the following affects the speed of the electrons emitted from the tubehead? kVp A step wedge can be used to demonstrate film contrast. Which of the following affects the quantity of x-rays being emitted from the tubehead? mA Dental healthcare personnel can BEST shield themselves from radiation during patient exposure by standing behind a drywall barrier. The most common artificial radiation exposure comes from medical radiation. Which of the following landmarks is useful when mounting films in the maxillary posterior area? Floor of the maxillary sinus Radiation injury can be measured by dose rate. Which of the following radiograph techniques is recommended for a patient with a shallow palate? Bisecting Most bilateral findings in radiographs are considered normal anatomic landmarks. When taking radiographs on a small child who cannot hold the film intra-orally, the dental assistant should ask a parent or guardian to hold the film. The BEST radiograph to evaluate a suspected salivary stone in the submandibular gland is a/an occlusal To produce ionizing radiation, an atom must add an electron. According to the inverse square law, when changing the PID length from 8 to 16 inches, the beam's intensity is 1/4 as intense The amount of radiation and exposure time needed to produce a diagnostic radiograph is best determined by film speed Which of the following quality control tests evaluates safelighting in the darkroom? Coin test When taking a panoramic radiograph, the patient's head should be oriented with the midsagittal plane perpendicular to the floor. Which of the following errors occur when the vertical angulation is incorrect? Elongation Which of the following radiation injury theories describes cells that are damaged by way of absorption? Indirect During film processing, which of the following can cause a dark image? Overdeveloped film Which of the following may cause film fogging? Using expired film If there are no teeth to serve as guides, which of the following landmarks indicates a maxillary molar area radiograph? Tuberosity Which of the following is the first step in processing radiographic film? Developing Cone beam computed tomography uses 3-dimensional technology. Leakage radiation is defined as any radiation that is from the primary beam. Which of the following radiographic errors is caused by removing a film too quickly from a tightly packed box? Static electricity Before exposing radiographs on a minor, the dental assistant should obtain consent from parent or legal guardian. The Frankfort Plane is an imaginary plane passing through the external auditory meatus to the floor of the orbit. Which of the following results in a double image radiograph? Exposing the same film twice An underexposed film will appear light How frequently should processing solutions be replenished? Daily Which of the following is the measurement of force that refers to the potential difference between two electrical charges? Voltage Radiographs appear dark after processing when the developing solution is too warm. Which of the following regulates the manufacturing and installation of x-ray equipment? Federal government Which of the following landmarks would be seen in a maxillary anterior periapical radiograph? Incisive foramen If disposable barriers are not used during a radiographic procedure all clinical surfaces should be disinfected. Which of the following condition may mimic caries on an intraoral radiograph? Root resorption Which of the following PID produces the greatest amount of secondary radiation? Closed-end plastic cone The expiration date on dental x-ray film is printed on the film packaging box. Which of the following landmarks is useful when mounting films of the mandibular posterior area? Mental foramen Which of the following helps to decrease exposure of the thyroid gland from the primary radiation beam? Paralleling technique Which of the following landmarks are located by the midline of the mandible? Genial tubercles Which of the following should be used to prevent cross-contamination from exposure buttons? Plastic cover The most important responsibility of the dental assistant in dental radiography is implementing ALARA principle. The radiation that is formed by the interaction of x-rays with matter is secondary radiation. Which of the following film sizes would be used for an adult periapical film? size 2 The diameter of the cone-shaped beam produced from a circular collimator is 2.75 inches. Which of the following radiation effects increase in severity as more radiation is absorbed by somatic cells? Nonstochastic When transporting a disposable cup containing patients exposed film to the development area, the dental assistant should carry the container with an ungloved hand. On a radiograph, the anterior alveolar crest normally appears pointed and sharp. Which of the following sequences best describes radiation injury to tissue? Latent period, period of injury, period of recovery The use of a thyroid collar is recommended for all of the following radigraphic exposures EXCEPT panoramic. Which of the following can be observed on a panoramic radiograph when the patient's chin is tipped downward? Exaggerated smile Which of the following is a disposable intraoral x-ray film holder device? Stabe® On a radiograph, when the contact area of one tooth is superimposed over the contact of another, it is called overlapping. Which of the following prevents x-rays from escaping the tubehead? Leaded-glass housing A cephalometric radiograph is PRIMARILY used to evaluate lateral jaw development. The purpose of a grid device on an extraoral cassette is to reduce scatter radiation reaching the film. Which of the following would cause elongation on a radiograph? Insufficient vertical angulation Radiation injury results from exposure ALARA is primarily concerned with the radiation that is artificial. Patients receive less radiation when using a/an rectangular PID The purpose of the aluminum disc in the x-ray tubehead is to filter out long wave x-rays from the primary beam. Which organization regulates disinfectants and chemical sterilants? EPA When preparing a patient for a radiographic procedure, PRIOR to putting on gloves the dental assistant should place the led apron. If a patient's gag reflex is stimulated during the radiographic procedure, the dental assistant should apply distraction techniques to divert his or her attention. Long-term effects of exposure to radiation may be associated with birth abnormalities. The primary function of collimation is to restrict the size of the beam Which of the following is a DISADVANTAGE of panoramic radiographs? Higher cost of equipment The penetrating x-ray beam produced during dental radiography is called primary radiation. While exposing x-ray films, radiation deflecting off the patient's head is called scatter radiation. According to the CDC, how are the transmission of pathogens minimized when using phosphor sensors to capture radiographic images? By placing a plastic barrier over the sensor When exposing radiographs, what is the minimum distance the operator should stand from the tube head? 6 feet The lead apron and thyroid collar used during radiography should be disinfected after each use. Developing solution temperatures should be checked frequently when using manual processing. The most common radiographic exposure used to evaluate a dental implant on an adult is periapical. Which of the following radiolucencies may be mistaken for caries? Cervical burnout Using the ALARA concept as a guideline for radiographs includes all of the following EXCEPT using a circular PID. The most common radiographic exposure used to detect periodontal disease is a/an periapical. Which of the following describes how most radiographic carious lesions appear? Radiolucent Duplicating film is coated with one-sided emulsion Supernumerary teeth are best detected using what type of film? Panoramic Which of the following is the most effective method of reducing patient exposure to x-radiation? Fast film The normalizing device can be used to monitor developer strength. A radiograph will automatically be retaken when there is a double exposure. To view an abscess on tooth #25, the best radiographic exposure is a/an periapical. Compared to a round position-indicating device (PID), which of the following PIDs reduces patient radiation exposure by up to 70 percent? Rectangular-shaped Maximum wattage for a safelight bulb should be 15 Dilaceration in a radiographic image indicates the root shape is abnormally bent or curved. On a radiograph, what is the dense radiopaque band that outlines the edge of the mandible? Inferior border Which of the following is most likely to cause a stored radiograph to turn brown over time? Underwashing