Which tooth structure is the enamel
most radiopaque?
Which of the following B. Bone
structures would appear
radiopaque on a dental
radiograph?
A. Air Space
B. Bone
C. Periodontal Ligament
D. Pulp Tissue
The maximum annual A. 0.5 REM per year
permissible dose (MPD) of
ionizing radiation for the
public is:
A. 0.5 REM per year
B. 1.0 REM per year
C. 0.05 REM per year
D. 5.0 REM per year
When exposing B. be reduced
radiographs on an
edentulous patient,
compared to a dentulous
patient, the exposure time
should:
A. be increased
B. be reduced
C. remain the same
,To reduce cross- D. take complete medical histories
contamination during dental
radiography, the CDC
recommends that dental
radiography operators do
all of the following EXCEPT:
A. cover the control unit &
tube head with plastic
barriers
B. use sterilizable or
disposable film holders
C. wear gloves
D. take complete medical
histories
Which of the following B. A plan for corrective action
should be included in a
quality assurance policy for
dental radiographs?
A. A budget for all
expenses
B. A plan for corrective
action
C. A chart of clinical
protocols
D. Schedule to take
inventory
, Which of the following are C. Control panel, extension arm,
common parts of a dental tubehead
x-ray machine?
A. Beam alignment device,
film holder, collimating
device
B. Exposure button,
exposure light, control
device
C. Control panel, extension
arm, tubehead
D. PID, XCP-ring, endo-ring
Ionization occurs when an A. loses an electron
x-ray strikes an atom & the
atom:
A. loses an electron
B. loses a proton
C. gains a neutron
D. gains a positron
Which of the following B. Bitewing
radiographic exposures
produces a radiograph that
shows the crowns of both
maxillary & mandibular
teeth?
A. Cephalometric
B. Bitewing
C. Periapical
D. Occlusal
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