RHS Exam: Questions With Step-By-Step Solutions
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. Correct Answer - 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. Correct Answer - 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 Correct Answer - B. Patient name
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
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. Correct Answer - 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. 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
Back-scatter radiation to the film is prevented by the
A. outer wrap.
B. black paper.
C. polysoft wrapping.
,D. lead foil. Correct Answer - 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 Correct Answer - 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. 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
Storing unexposed radiographic film in high humidity conditions may cause
A. film browning.
B. cracks in the emulsion.
C. film fog.
, D. herringbone effect. Correct Answer - 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. Correct Answer - 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 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.
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. Correct Answer - 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. Correct Answer - 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 Correct Answer - B. Patient name
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
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. Correct Answer - 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. 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
Back-scatter radiation to the film is prevented by the
A. outer wrap.
B. black paper.
C. polysoft wrapping.
,D. lead foil. Correct Answer - 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 Correct Answer - 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. 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
Storing unexposed radiographic film in high humidity conditions may cause
A. film browning.
B. cracks in the emulsion.
C. film fog.
, D. herringbone effect. Correct Answer - 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. Correct Answer - 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 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.
