RHS PRACTICE EXAM 2024/2025 WITH
CORRECT ANSWERS
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. - CORRECT ANSWER-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 - CORRECT ANSWER-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 - CORRECT ANSWER-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 - CORRECT ANSWER-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 - CORRECT ANSWER-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. - CORRECT ANSWER-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 - CORRECT ANSWER-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. - CORRECT ANSWER-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 - CORRECT ANSWER-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. - CORRECT ANSWER-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 - CORRECT ANSWER-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 - CORRECT ANSWER-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 - CORRECT ANSWER-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 - CORRECT ANSWER-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 - CORRECT ANSWER-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. - CORRECT ANSWER-C. primary
radiation.
To prevent cross-contamination, wipe the counter top with
A. an EPA-approved disinfectant.
B. alcohol wipes.
C. bleach solution.
CORRECT ANSWERS
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. - CORRECT ANSWER-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 - CORRECT ANSWER-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 - CORRECT ANSWER-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 - CORRECT ANSWER-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 - CORRECT ANSWER-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. - CORRECT ANSWER-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 - CORRECT ANSWER-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. - CORRECT ANSWER-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 - CORRECT ANSWER-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. - CORRECT ANSWER-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 - CORRECT ANSWER-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 - CORRECT ANSWER-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 - CORRECT ANSWER-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 - CORRECT ANSWER-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 - CORRECT ANSWER-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. - CORRECT ANSWER-C. primary
radiation.
To prevent cross-contamination, wipe the counter top with
A. an EPA-approved disinfectant.
B. alcohol wipes.
C. bleach solution.
