Essentials for Dental Radiographers
(2 Credit Hours - $30.00)
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for scoring and certificate issuance. Or, if you wish to receive your certificate immediately,
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Fax your completed exam to 703-935-2190
Please mark only one best answer to the following questions on the one page answer
sheet. This test contains 10 questions.
Please mark your answers in spaces numbered 1 through 10 on your answer sheet.
1. The discoverer of x-rays was:
a. Conrad Bremsstrahlung
b. Wilhelm Conrad Roentgen
c. Wilhelm Compton
d. Conrad Wilhelm
2. The dental x-ray tube contains:
c. a cathode, an anode, and a focusing cup
d. none of the above
3. X rays can:
a. penetrate matter, produce a latent image, make some materials
fluorescent, and produce ionization of some materials
b. penetrate lead, produce a latent image, make some materials melt,
and produce ionization of some materials.
c. penetrate matter, produce a photographic image, make some
materials fluorescent, and produce duplication of some materials.
d. penetrate light, produce a blue image, make some materials vibrate,
and produce reorganization of some materials.
4. The x-ray radiation wavelengths and penetration characteristics are
controlled according to what variables?
a. filament temperature
d. all of the above
5. X-ray films that have too little density appear
c. too light
6. One way to make sure exposed radiograph packets do not spread
infectious agents is:
a. air dry before processing
b. have patient use a rinse like Listerine before taking the radiographs
c. use a barrier envelope on the film and remove the envelope without
touching the film with a gloved hand.
d. run the films through a heat sterilizer cycle before processing.
7. Dentists prescribe radiographs on the basis of:
a. clinical observation
b. the patient’s health history
c. a predetermined routine for all patients
d. a and b
8. Clinical situations for which radiographs may be indicated include:
a. negative Clinical signs/symptoms.
b. history of pain or trauma.
c. history of a dentition.
d. no evidence of facial trauma.
9. A licensed dentist or a properly supervised dental student must
determine the number and types of x-rays. Taking radiographs based
on a predetermined timetable (every year or every 6 months) is not
considered an acceptable standard of care.
a. false: a dental assistant may determine the number and types of x-
rays without an exam by the dentist.
b. false: radiographs should be taken based on a predetermined
timetable as established by the State Board of Dentistry.
10. Gagging is best controlled by:
a. Persuading the patient to breath through the nose.
b. being firm with the patient.
c. having the patient pant through the mouth.
d. using topical anesthetic on the patient’s tongue and throat.