RHS Exam Questions and Correct Answers
Latest Updated
Question 1
which of the following lesions appears radiopaque on an image?
Correct Answer
sclerotic bone
Question 2
cells most suspectable to radiation damage are?
Correct Answer
bone marrow
Question 3
if there are no teeth to serve as guides, which of the following landmarks indicates a
maxillary molar area on a radiograph?
Correct Answer
tuberosity
Question 4
which of the following anatomical landmarks is NOT normally seen on intraoral
radiographs?
Correct Answer
frontal sinus
Page 1 of 105
,Question 5
while exposing digital images, radiation deflecting off the patient's head is?
Correct Answer
scatter radiation
Question 2
Which of the following structures would appear radiopaque on a dental
radiograph?
A. Air Space
B. Bone
C. Periodontal Ligament
D. Pulp Tissue
Correct Answer
B. Bone
Question 3
The maximum annual 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
Correct Answer
A. 0.5 REM per year
Question 4
When exposing radiographs on an edentulous patient, compared to a
dentulous patient, the exposure time should:
A. be increased
B. be reduced
C. remain the same
Correct Answer
B. be reduced
Page 2 of 105
,Question 5
To reduce cross-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
Correct Answer
D. take complete medical histories
Question 6
Which of the following 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
Correct Answer
B. A plan for corrective action
Question 7
Which of the following are common parts of a dental 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
Correct Answer
C. Control panel, extension arm, tubehead
Page 3 of 105
, Question 8
Ionization occurs when an x-ray strikes an atom & the atom:
A. loses an electron
B. loses a proton
C. gains a neutron
D. gains a positron
Correct Answer
A. loses an electron
Question 9
Which of the following radiographic exposures produces a radiograph that
shows the crowns of both maxillary & mandibular teeth?
A. Cephalometric
B. Bitewing
C. Periapical
D. Occlusal
Correct Answer
B. Bitewing
Question 10
Which of the following anatomical landmarks is NOT normally seen on intraoral
radiographs?
A. Nutrient canals
B. Mandibular canal
C. Frontal sinus
D. Maxillary sinuses
Correct Answer
C. Frontal sinus
Page 4 of 105
Latest Updated
Question 1
which of the following lesions appears radiopaque on an image?
Correct Answer
sclerotic bone
Question 2
cells most suspectable to radiation damage are?
Correct Answer
bone marrow
Question 3
if there are no teeth to serve as guides, which of the following landmarks indicates a
maxillary molar area on a radiograph?
Correct Answer
tuberosity
Question 4
which of the following anatomical landmarks is NOT normally seen on intraoral
radiographs?
Correct Answer
frontal sinus
Page 1 of 105
,Question 5
while exposing digital images, radiation deflecting off the patient's head is?
Correct Answer
scatter radiation
Question 2
Which of the following structures would appear radiopaque on a dental
radiograph?
A. Air Space
B. Bone
C. Periodontal Ligament
D. Pulp Tissue
Correct Answer
B. Bone
Question 3
The maximum annual 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
Correct Answer
A. 0.5 REM per year
Question 4
When exposing radiographs on an edentulous patient, compared to a
dentulous patient, the exposure time should:
A. be increased
B. be reduced
C. remain the same
Correct Answer
B. be reduced
Page 2 of 105
,Question 5
To reduce cross-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
Correct Answer
D. take complete medical histories
Question 6
Which of the following 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
Correct Answer
B. A plan for corrective action
Question 7
Which of the following are common parts of a dental 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
Correct Answer
C. Control panel, extension arm, tubehead
Page 3 of 105
, Question 8
Ionization occurs when an x-ray strikes an atom & the atom:
A. loses an electron
B. loses a proton
C. gains a neutron
D. gains a positron
Correct Answer
A. loses an electron
Question 9
Which of the following radiographic exposures produces a radiograph that
shows the crowns of both maxillary & mandibular teeth?
A. Cephalometric
B. Bitewing
C. Periapical
D. Occlusal
Correct Answer
B. Bitewing
Question 10
Which of the following anatomical landmarks is NOT normally seen on intraoral
radiographs?
A. Nutrient canals
B. Mandibular canal
C. Frontal sinus
D. Maxillary sinuses
Correct Answer
C. Frontal sinus
Page 4 of 105
