Dental Assisting Radiology Practice Exam
Questions with Answers
1. A lead apron and a thyroid collar: must be used on all patients for all exposures
2. A good technique for reducing the radiation exposure to both patient and operator is the use of: fast film or
digital imaging
3. A patient is concerned with radiation exposure. You can assure him that your office uses the ALARA
concept, which includes: reducing the number of exposures, minimizing retakes, keeping exposure levels as low as
possible
4. All of the following structures will appear radiolucent on dental x-ray film except: metal restorations
5. An example of cumulative radiation exposure is: cataracts, leukemia, cancer
6. Anything that occupies space and has a form or shape is: matter
7. Because the entire x-ray area is considered a radiation hazard area, a radiation hazard sign must be posted in:
sight of patients, and sight of personnel
8. Chronic radiation exposure occurs when dose of radiation is re- ceived
over a time period: small; long
9. Damage caused by ionizing x-radiation to genetic cells:: can affect future generations
10. Damage to which type of cell is passed on to future generations?: genetic cell
11. Exposure to radiation:: no matter how small, has the potential to cause harmful biologic change
12. How much filtration is federally required for a dental x-ray machine oper- ating over 70 kVp?: 2.5 mm
13. One of the rules of radiation protection is never stand closer than
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, feet from the x-ray unit during an exposure: 6
14. Primary radiation is:: also called the useful beam, the beam of x-ray that comes from the target
15. Secondary radiation:: refer to x-radiation that is created when the primary beam interacts with matter
16. The Guidelines for Prescribing Dental Radiographs issued by the ADA and the FDA recommend which of
the following dental imaging procedures for a pregnant patient?: Radiographic imaging procedures do not need to
be altered because of pregnancy
17. The maximum permissible dose for an occupational worker for an individ- ual 18 years of age or older is
rem/year: 5
18. The x-ray was discovered on November 8, 1895, by:: Wilhelm Conrad Roent- gen
19. Who should hold the film in a patient's mouth if the patient is unable to do so?: Parent or relative of the patient
20. When the matter switch is on:: the electron cloud is emitted
21. An extraoral dental x-ray film is:: more sensitive to light than intraoral film
22. Automatic film processing requires than manual film processing does: less
equipment
23. Dental film holders, used to position and hold the dental x-ray films in the patient's mouth, include:: XPC
and disposable block, EeZee-Grip and EndoRay
24. Film speed is determined by the:: thickness of silver bromide salt, and size of the silver bromide crystals
25. The correct order of steps in manual film processing is:: develop. rinse, fix, wash
26. The extraoral film placed outside the mouth during x-ray exposure is:: -
panoramic
27.ThisThe idea time and temperature for manual developing is:: 5 minutes at 68 degrees C
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Questions with Answers
1. A lead apron and a thyroid collar: must be used on all patients for all exposures
2. A good technique for reducing the radiation exposure to both patient and operator is the use of: fast film or
digital imaging
3. A patient is concerned with radiation exposure. You can assure him that your office uses the ALARA
concept, which includes: reducing the number of exposures, minimizing retakes, keeping exposure levels as low as
possible
4. All of the following structures will appear radiolucent on dental x-ray film except: metal restorations
5. An example of cumulative radiation exposure is: cataracts, leukemia, cancer
6. Anything that occupies space and has a form or shape is: matter
7. Because the entire x-ray area is considered a radiation hazard area, a radiation hazard sign must be posted in:
sight of patients, and sight of personnel
8. Chronic radiation exposure occurs when dose of radiation is re- ceived
over a time period: small; long
9. Damage caused by ionizing x-radiation to genetic cells:: can affect future generations
10. Damage to which type of cell is passed on to future generations?: genetic cell
11. Exposure to radiation:: no matter how small, has the potential to cause harmful biologic change
12. How much filtration is federally required for a dental x-ray machine oper- ating over 70 kVp?: 2.5 mm
13. One of the rules of radiation protection is never stand closer than
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, feet from the x-ray unit during an exposure: 6
14. Primary radiation is:: also called the useful beam, the beam of x-ray that comes from the target
15. Secondary radiation:: refer to x-radiation that is created when the primary beam interacts with matter
16. The Guidelines for Prescribing Dental Radiographs issued by the ADA and the FDA recommend which of
the following dental imaging procedures for a pregnant patient?: Radiographic imaging procedures do not need to
be altered because of pregnancy
17. The maximum permissible dose for an occupational worker for an individ- ual 18 years of age or older is
rem/year: 5
18. The x-ray was discovered on November 8, 1895, by:: Wilhelm Conrad Roent- gen
19. Who should hold the film in a patient's mouth if the patient is unable to do so?: Parent or relative of the patient
20. When the matter switch is on:: the electron cloud is emitted
21. An extraoral dental x-ray film is:: more sensitive to light than intraoral film
22. Automatic film processing requires than manual film processing does: less
equipment
23. Dental film holders, used to position and hold the dental x-ray films in the patient's mouth, include:: XPC
and disposable block, EeZee-Grip and EndoRay
24. Film speed is determined by the:: thickness of silver bromide salt, and size of the silver bromide crystals
25. The correct order of steps in manual film processing is:: develop. rinse, fix, wash
26. The extraoral film placed outside the mouth during x-ray exposure is:: -
panoramic
27.ThisThe idea time and temperature for manual developing is:: 5 minutes at 68 degrees C
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