1. Who was awarded the first Nobel Prize for physics in 1901, for his experimental work with radiation?
a. W. J. Morton
b. O. Walkhoff
c. W. D. Coolidge
d. W. C. Roentgen
2. Who is credited with introducing the bitewing radiograph?
a. F. W. McCormack
b. H. R. Raper
c. G. M. Fitzgerald
d. C. E. Kells
3. Who developed the hot cathode ray tube?
a. W. D. Coolidge
b. W. A. Price
c. H. R. Raper
d. W. H. Rollins
4. The development of radiation protection as a science is credited to:
a. A. Cieszyński.
b. W. D. Coolidge.
c. W. H. Rollins.
d. F. Mouyen.
,5. What New Orleans dentist first made practical use of x-rays in the treatment of
dental patients?
a. H. R. Raper
b. G. M. Fitzgerald
c. F. Mouyen
d. C. E. Kells
6. Early researchers working in the field of radiography were not aware that continued
exposure to x-rays produced accumulations of radiation effects in the body because
x-rays are invisible.
a. Both the statement and reason are correct and related.
b. Both the statement and reason are correct but NOT related.
c. The statement is correct, but the reason is NOT.
d. The statement is NOT correct, but the reason is correct.
e. NEITHER the statement NOR the reason is correct.
7. The most significant advancement in the early days of radiography came in 1913 when W. D. Coolidge:
a. became the first to alert the profession of the dangers of radiation exposure and advocated for the
science of radiation protection.
b. exposed a prototype of a dental radiograph, setting the stage for preventive oral health care.
c. developed a variable, high kilovoltage x-ray machine compatible with the paralleling technique.
d. introduced an x-ray tube that allowed for an x-ray output that could be predetermined and accurately
controlled.
8. The first dental radiograph was produced using an exposure time of:
a. 0.5 second.
b. 1 minute.
c. 5 minutes.
d. 25 minutes.
, e. 1 hour.
9. What component of the dental x-ray machine best limits the size of the x-ray beam to the approximate size
of the image receptor?
a. A pointed cone
b. An open round cylinder
c. A rectangular PID
d. A slit collimator
10. Panoramic radiology became popular in the:
a. 1930s.
b. 1940s.
c. 1950s.
d. 1960s.
e. 1970s.
11. Which of the following is NOT true regarding cone beam volumetric imaging?
a. It images a single selected plane of tissues.
b. It is based on computed tomography.
c. It uses less radiation than a panoramic radiograph.
d. It is designed specifically for imaging dental applications.
e. It is purported to become the gold standard for imaging certain oral conditions.
12. Early dental film required long exposure times because:
a. it was hand-wrapped.
b. the emulsion was only on one side.
c. glass plates were used as the base.
d. the packets were not moisture resistant.
13. Each of the following is an advantage of digital imaging EXCEPT one. Which one is the EXCEPTION?
a. It reduces radiation over film-based radiography.
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