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Dental Radiography Review Exam Questions And Answers Rated 100% Correct!!
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Dental Radiography Review Exam Questions And Answers Rated 100% Correct!!
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Dental Radiography Review ExamQuestions And Answers Rated 100%
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The most sensitive cells to ionizing radiation are
a. bone
b. muscle
c. nerve
d. reproductive Answer- d. reproductive
The best type of x-ray to penetrate body tissue is
a. low frequencies
b. high frequencies, short wavelength
c. long wavelength
d. soft rays, long wavelength Answer- b. high frequencies, short wavelength
Before seating the dental patient, it is necessary to cover which of the following items
with disposable plastic wrap?
a. X-ray exposure control panel
b. Lead apron
c. X-ray film holding devices
d. Operator film badge Answer- a. x-ray exposure control panel
Milliamperage controls
a. The speed with which electrons move from cathode to anode
b. Cooling of the anode
c. Heating of the anode
d. Heating of the cathode Answer- d. heating of the cathode
The dental assistant must utilize which of the following personal protective
equipment (PPE) when exposing films?
a. Safety goggles
b. Gloves
c. Chin-length face shield
d. Tinted lenses Answer- b. gloves
The lead diaphragm (collimator) determines the size and shape of the
a. electron cloud
,b. film used
c. x-ray beam
d. filament Answer- c. x-ray beam
The portion of the target that is struck by electrons is called the
a. focal spot
b. photon point
c. principal point
d. end point Answer- a. focal spot
Proper collimation for the film size and target-film distance will
a. increase the wavelength
b. decrease the wavelength
c. increase the kVp
d. decrease the radiation received by the patient Answer- d. decrease the radiation
received by the patient
To increase the penetrating quality of an x-ray beam, the auxiliary must
a. increase the kVp
b. decrease the kVp
c. increase mA
increase FFD Answer- a. increase the kVp
The x-ray at the center of the primary beam is called the
a. Photon ray
b. Central ray
c. Secondary ray
d. Restricted beam Answer- b. central ray
A test for quality control relative to manual processing may be accomplished utilizing
a. test tube
b. darkroom safelight
c. water thermometer
d. stepwedge Answer- d. step wedge
Filtration of the x-ray beam protects the patient by
a. eliminating all radiation from the x-ray head
b. eliminating weak wavelength x-rays from the x-ray beam
c. eliminating short wavelength x-rays from the x-ray beam
d. decreasing exposure time Answer- b. eliminating weak wavelengths x-rays from
the x-ray beam
Information and instructions for proper disposal of x-ray processing solutions may be
found in the
,a. Darkroom
b. Dental laboratory
c. Product material safety data sheet (MSDS)
d. Office exposure control plan Answer- c. product material safety data sheet
(MSDS)
Scatter radiation is a type of
a. secondary radiation
b. primary radiation
c. stray radiation
d. filtered radiation Answer- a. secondary radiation
The quality, or penetrating power, of secondary radiation is
a. more than that of primary radiation
b. less than that of primary radiation
c. the same as that of primary radiation
d. unrelated to that of primary radiation Answer- b. less than that of primary radiation
The time period between the exposure to ionizing radiation and visible tissue
damage is the
a. Short term period
b. Acute effect period
c. Latent period
d. Long term period Answer- c. latent period
The amount of radiation a person receives
a. begins anew each day
b. is cumulative only on the skin
c. Is cumulative in the entire body
d. Is not harmful in small doses Answer- c. is cumulative in the entire body
Maximum protection of the patient requires that the x-ray beam pass through a:
a. Shielded open-ended cone
b. Plastic closed-ended cone
c. Shielded closed-ended cone
d. Lead apron Answer- a. shielded open-ended cone
A technique used to measure the operator's exposure to radiation is
a. To check the color of the operator's fingernails
b. For the operator to wear a radiation film badge
c. To multiply the number of films the operators has exposed by 0.1 rem
d. To count the number of full mouth x-ray series taken Answer- b. for the operator
to wear a radiation film badge
, Accumulated radiation dosage for those who work with radiation may not exceed
a. 0-1 rem/year
b. 3 rems/year
c. 4 rems/year
d. 5 rems/year Answer- d. 5 rems/ year
To avoid exposure to secondary radiation, the operator should stand
a. At least 6' from the x-ray head
b. 2' to the right of the primary beam
c. Any distance in back of the x-ray head
d. 4" in front of the patient Answer- a. at least 6' from the x-ray head
The most effective way to reduce gonadal exposure from x-rays is to
a. Increase the kVp
b. Use a lead lap apron
c. Increase vertical angulation
d. Use proper collimation Answer- b. use a lead lap apron
After each use, the lead lap apron must be
a. Stored in the darkroom
b. Folded neatly and stored in the operatory
c. Draped over a support rod unfolded
d. Discarded for appropriate infection control Answer- c. draped over a support rad
unfolded
The best technique for reducing the radiation exposure to both patient and operator
is the use of
a. An automatic timer
b. Fast film
c. Thinner films
d. A thicker cellulose acetate base Answer- b. fast film
Film speed is determined by the
a. Amount of silver bromide salt
b. Thickness of cellulose acetate base
c. Size of the silver bromide crystals
d. Side of the film exposed Answer- c. size of the silver bromide crystals
The radiographic film is covered with an emulsion of
a. Silver bromide salts
b. Cellulose
c. Silver acetate
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