RHS Practice Exam 2023-2024 Question and Complete
Solutions.
Using the ALARA concept as a guideline for radiographs includes all of the following
EXCEPT
A. draping the patient with a thyroid collar.
B. using a circular PID.
C. draping the patient with a lead apron.
D. using a rectangular PID. - ANS B. using a circular PID.
Which of the following errors occur when the vertical angulation is incorrect?
A. Cone cut
B. Blurred image
C. Elongation
D. Overlapping - ANS C. Elongation
Which of the following was established to address the education and certification of
operators of radiographic equipment?
A. Radiation Control for Health and Safety
B. National Council on Radiation Protection and Measurements
C. Consumer-Patient Radiation Health and Safety Act
D. International Commission on Radiation Units and Measurements - ANS C.
Consumer-Patient Radiation Health and Safety Act
Which of the following protection techniques is used to minimize x-radiation exposure to
the operator?
A. Structural shielding
B. Wearing a lead line apron
C. Wearing a dosimeter
D. Standing next to the tubehead - ANS A. Structural shielding
When changing the 8-inch PID to a 16-inch PID, which of the following is used to
determine the intensity of the beam?
A. Rule of isometry
B. Inverse square law
C. Exposure chart
D. SLOB rule - ANS B. Inverse square law
Before exposing radiographs on a minor, the dental assistant should
A. obtain consent from parent or legal guardian.
B. explain radiographs are mandatory for all patients.
C. explain radiographs are required by insurance.
D. obtain consent from the patient. - ANS A. obtain consent from parent or legal
guardian.
,Which of the following helps to decrease exposure of the thyroid gland from the primary
radiation beam?
A. Bisecting angle technique
B. Use of round collimation
C. Paralleling technique
D. Decreasing the x-ray focal plane - ANS C. Paralleling technique
The maximum permissible dose (MPD) of ionizing radiation for occupational exposure is
A. 5.0 rem per year.
B. 0.05 rem per year.
C. 0.5 rem per year.
D. 1.0 rem per year. - ANS A. 5.0 rem per year.
Which of the following pathogens is NOT found in oral or respiratory secretions?
A. Mycobacterium tuberculosis
B. Hepatitis B virus
C. Flu virus
D. West Nile virus - ANS D. West Nile virus
The most common reason for taking bitewing radiographs is to evaluate
A. occlusal caries.
B. incipient caries.
C. calculus.
D. interproximal caries. - ANS D. interproximal caries.
How often should protective clothing be changed in an oral healthcare setting?
A. Twice daily
B. After each patient
C. Once weekly
D. When visibly soiled - ANS D. When visibly soiled
Where is the most common area in the oral cavity for a dentigerous cyst?
A. Between the central incisors
B. Around the canines
C. Around the third molars
D. Between the premolars - ANS C. Around the third molars
Which of the following measures the amount of radiation that reaches the surface of the
skin?
A. Dose rate
B. Quality factor
C. Mitotic activity
D. Roentgen - ANS D. Roentgen
, If there are no teeth to serve as guides, which of the following landmarks indicates a
maxillary molar area radiograph?
A. Tuberosity
B. Incisive foramen
C. Mental foramen
D. Internal oblique ridge - ANS A. Tuberosity
Which of the following PID produces the greatest amount of secondary radiation?
A. Open-end lead-lined cylinder
B. Open-end lead-lined rectangular
C. Closed-end plastic cone
D. Closed-end aluminum cylinder - ANS C. Closed-end plastic cone
The penetrating x-ray beam produced during dental radiography is called
A. characteristic radiation.
B. scatter radiation.
C. primary radiation.
D. secondary radiation. - ANS C. primary radiation.
To prevent cross-contamination, wipe the counter top with
A. an EPA-approved disinfectant.
B. alcohol wipes.
C. bleach solution.
D. soap and water. - ANS A. an EPA-approved disinfectant.
What is the primary advantage in using digital radiography?
A. Reduces the radiation to patient
B. Increases comfort for the patient
C. Increases image density
D. Reduces image contrast - ANS A. Reduces the radiation to patient
The occlusal plane will appear diagonal in the radiograph when there is a/an
A. incorrect vertical angulation.
B. poor horizontal angulation.
C. incorrect film placement.
D. bent film corner. - ANS C. incorrect film placement.
Personnel monitoring for radiation exposure is done by
A. observing physical changes over time.
B. wearing a dosimeter.
C. documenting the number of exposures.
D. reporting exposures to the state. - ANS B. wearing a dosimeter.
The amount of radiation and exposure time needed to produce a diagnostic radiograph
is best determined by
A. kVp.
Solutions.
Using the ALARA concept as a guideline for radiographs includes all of the following
EXCEPT
A. draping the patient with a thyroid collar.
B. using a circular PID.
C. draping the patient with a lead apron.
D. using a rectangular PID. - ANS B. using a circular PID.
Which of the following errors occur when the vertical angulation is incorrect?
A. Cone cut
B. Blurred image
C. Elongation
D. Overlapping - ANS C. Elongation
Which of the following was established to address the education and certification of
operators of radiographic equipment?
A. Radiation Control for Health and Safety
B. National Council on Radiation Protection and Measurements
C. Consumer-Patient Radiation Health and Safety Act
D. International Commission on Radiation Units and Measurements - ANS C.
Consumer-Patient Radiation Health and Safety Act
Which of the following protection techniques is used to minimize x-radiation exposure to
the operator?
A. Structural shielding
B. Wearing a lead line apron
C. Wearing a dosimeter
D. Standing next to the tubehead - ANS A. Structural shielding
When changing the 8-inch PID to a 16-inch PID, which of the following is used to
determine the intensity of the beam?
A. Rule of isometry
B. Inverse square law
C. Exposure chart
D. SLOB rule - ANS B. Inverse square law
Before exposing radiographs on a minor, the dental assistant should
A. obtain consent from parent or legal guardian.
B. explain radiographs are mandatory for all patients.
C. explain radiographs are required by insurance.
D. obtain consent from the patient. - ANS A. obtain consent from parent or legal
guardian.
,Which of the following helps to decrease exposure of the thyroid gland from the primary
radiation beam?
A. Bisecting angle technique
B. Use of round collimation
C. Paralleling technique
D. Decreasing the x-ray focal plane - ANS C. Paralleling technique
The maximum permissible dose (MPD) of ionizing radiation for occupational exposure is
A. 5.0 rem per year.
B. 0.05 rem per year.
C. 0.5 rem per year.
D. 1.0 rem per year. - ANS A. 5.0 rem per year.
Which of the following pathogens is NOT found in oral or respiratory secretions?
A. Mycobacterium tuberculosis
B. Hepatitis B virus
C. Flu virus
D. West Nile virus - ANS D. West Nile virus
The most common reason for taking bitewing radiographs is to evaluate
A. occlusal caries.
B. incipient caries.
C. calculus.
D. interproximal caries. - ANS D. interproximal caries.
How often should protective clothing be changed in an oral healthcare setting?
A. Twice daily
B. After each patient
C. Once weekly
D. When visibly soiled - ANS D. When visibly soiled
Where is the most common area in the oral cavity for a dentigerous cyst?
A. Between the central incisors
B. Around the canines
C. Around the third molars
D. Between the premolars - ANS C. Around the third molars
Which of the following measures the amount of radiation that reaches the surface of the
skin?
A. Dose rate
B. Quality factor
C. Mitotic activity
D. Roentgen - ANS D. Roentgen
, If there are no teeth to serve as guides, which of the following landmarks indicates a
maxillary molar area radiograph?
A. Tuberosity
B. Incisive foramen
C. Mental foramen
D. Internal oblique ridge - ANS A. Tuberosity
Which of the following PID produces the greatest amount of secondary radiation?
A. Open-end lead-lined cylinder
B. Open-end lead-lined rectangular
C. Closed-end plastic cone
D. Closed-end aluminum cylinder - ANS C. Closed-end plastic cone
The penetrating x-ray beam produced during dental radiography is called
A. characteristic radiation.
B. scatter radiation.
C. primary radiation.
D. secondary radiation. - ANS C. primary radiation.
To prevent cross-contamination, wipe the counter top with
A. an EPA-approved disinfectant.
B. alcohol wipes.
C. bleach solution.
D. soap and water. - ANS A. an EPA-approved disinfectant.
What is the primary advantage in using digital radiography?
A. Reduces the radiation to patient
B. Increases comfort for the patient
C. Increases image density
D. Reduces image contrast - ANS A. Reduces the radiation to patient
The occlusal plane will appear diagonal in the radiograph when there is a/an
A. incorrect vertical angulation.
B. poor horizontal angulation.
C. incorrect film placement.
D. bent film corner. - ANS C. incorrect film placement.
Personnel monitoring for radiation exposure is done by
A. observing physical changes over time.
B. wearing a dosimeter.
C. documenting the number of exposures.
D. reporting exposures to the state. - ANS B. wearing a dosimeter.
The amount of radiation and exposure time needed to produce a diagnostic radiograph
is best determined by
A. kVp.
