RHS PRACTICE EXAM QUESTIONS & ANSWERS
Chemical agents should be properly disposed of according to
A. dental office protocol.
B. state and federal recommendations.
C. OSHA and local laws.
D. federal, state and local laws. - Answers - D. federal, state and local laws.
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. - Answers - B. using a circular PID.
Which of the following is most essential when labeling the film mount?
A. Dentist name
B. Patient name
C. Dentist address
D. Patient address - Answers - B. Patient name
Back-scatter radiation to the film is prevented by the
A. outer wrap.
B. black paper.
C. polysoft wrapping.
D. lead foil. - Answers - D. lead foil.
Which of the following results in a double image radiograph?
A. Processing two exposed films together
B. Exposing a duplicating film
C. Processing two unexposed films together
D. Exposing the same film twice - Answers - D. Exposing the same film twice
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. - Answers - 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 - Answers - 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. - Answers - 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 - Answers - D. When visibly soiled
Storing unexposed radiographic film in high humidity conditions may cause
A. film browning.
B. cracks in the emulsion.
C. film fog.
D. herringbone effect. - Answers - C. film fog.
The best way to prevent cross-contamination from an exposed film packet is by
A. using an antiseptic rinse agent.
B. using individual barrier envelopes.
C. disinfection.
D. sterilization. - Answers - B. using individual barrier envelopes.
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 - Answers - C. Around the third molars
Which of the following errors occur when the vertical angulation is incorrect?
A. Cone cut
B. Blurred image
C. Elongation
D. Overlapping - Answers - 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 - Answers - 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 - Answers - 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 - Answers - B. Inverse square law
Once the film has been removed from the protective packet, the dental assistant should
A. recycle lead foil in separate container.
B. dispose the lead foil in trash.
C. dispose of entire packet in trash.
D. recycle the black paper in separate container. - Answers - A. recycle lead foil in
separate container.
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. - Answers - 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 - Answers - C. Paralleling technique
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 - Answers - 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 - Answers - 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 - Answers - 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. - Answers - 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. - Answers - 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 - Answers - 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. - Answers - C. incorrect film placement.
Which of the following is a disposable intraoral x-ray film holder device?
A. Rinn XCP®
B. Eezee grip®
C. Endoray®
D. Stabe® - Answers - D. Stabe®
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. - Answers - B. wearing a dosimeter.
Chemical agents should be properly disposed of according to
A. dental office protocol.
B. state and federal recommendations.
C. OSHA and local laws.
D. federal, state and local laws. - Answers - D. federal, state and local laws.
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. - Answers - B. using a circular PID.
Which of the following is most essential when labeling the film mount?
A. Dentist name
B. Patient name
C. Dentist address
D. Patient address - Answers - B. Patient name
Back-scatter radiation to the film is prevented by the
A. outer wrap.
B. black paper.
C. polysoft wrapping.
D. lead foil. - Answers - D. lead foil.
Which of the following results in a double image radiograph?
A. Processing two exposed films together
B. Exposing a duplicating film
C. Processing two unexposed films together
D. Exposing the same film twice - Answers - D. Exposing the same film twice
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. - Answers - 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 - Answers - 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. - Answers - 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 - Answers - D. When visibly soiled
Storing unexposed radiographic film in high humidity conditions may cause
A. film browning.
B. cracks in the emulsion.
C. film fog.
D. herringbone effect. - Answers - C. film fog.
The best way to prevent cross-contamination from an exposed film packet is by
A. using an antiseptic rinse agent.
B. using individual barrier envelopes.
C. disinfection.
D. sterilization. - Answers - B. using individual barrier envelopes.
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 - Answers - C. Around the third molars
Which of the following errors occur when the vertical angulation is incorrect?
A. Cone cut
B. Blurred image
C. Elongation
D. Overlapping - Answers - 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 - Answers - 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 - Answers - 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 - Answers - B. Inverse square law
Once the film has been removed from the protective packet, the dental assistant should
A. recycle lead foil in separate container.
B. dispose the lead foil in trash.
C. dispose of entire packet in trash.
D. recycle the black paper in separate container. - Answers - A. recycle lead foil in
separate container.
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. - Answers - 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 - Answers - C. Paralleling technique
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 - Answers - 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 - Answers - 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 - Answers - 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. - Answers - 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. - Answers - 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 - Answers - 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. - Answers - C. incorrect film placement.
Which of the following is a disposable intraoral x-ray film holder device?
A. Rinn XCP®
B. Eezee grip®
C. Endoray®
D. Stabe® - Answers - D. Stabe®
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. - Answers - B. wearing a dosimeter.
