Radiation Health and Safety Exam
Questions and Answers 100% Pass
When taking a panoramic radiograph of an obese patient, as compared to a slim patient,
exposure (kV or mA) a should be
a. be decreased
b. be increased
c. remain the same - ANSWER-b. be increased
Question: The major disadvantage of the bisecting angle technique is that...
a. the film is more difficult to place.
b. image distortion is more likely.
c. the exposure time is significantly longer.
d. the amount of radiation absorbed by the patient is increased. - ANSWER-b. image distortion
is more likely
Question: To reduce cross-comtanation during radiography, the CDC and ADA recommend
that the operators do all of the following EXECPT
a. wear gloves
,b. dispose of saliva- contaminated film packet carefully.
c. use sterilizable or disposable film holders.
d. cover control unit and the tube-head with plastic barrier.
e. take complete medical histories - ANSWER-e. take complete medical histories
Question: Ideally, a lead apron would be used
a. for a full moth series
b. for any dental radiographs
c. if the kV is increased above normal.
d. when the X-ray machine is suspected of malfunctioning. - ANSWER-b. for any dental
radiographs
Question: A full mouth radiographic series has just been processed manually. The operator notes
that the films on the bottom of the rack are of a different density. What could have caused this?
a. developing solution was too cold.
b. developing solution was contaminated
c. fixer solution was reaching exhaustion.
d. solutions were not stirred before processing - ANSWER-d. solutions were not stirred before
processing
Question: A film that has been exposed to scattered radiation will appear
,a. brown
b. fogged
c. green
d. clear - ANSWER-b. fogged
Question: X-ray exposure time should be increased if the patient is
a. very old
b. edentulous
c. large adult
d. very young - ANSWER-c. large adult
Question: Before exposing a panoramic radiograph on a patient, the operator should request the
removal of all of the following EXECPT
a. watch
b. dentures
c. eyeglasses
d. removable bridgework
e. earrings - ANSWER-a. watch
Question: A parent refuses to have radiographs taken on his/her child. The dental assistant
should
, a. explain that the radiographs are necessary for insurance reimbursement
b. inform the dentist and document parent's refusal
c. expose the necessary radiographs without the parents knowledge
d. refer the parent to another dentist - ANSWER-b. inform the dentist and document parent's
refusal
Question: Incorrect horizontal angulation of the primary beam produces
a. overlapping of occlusal surfaces
b. overlapping of proximal surfaces
c. lengthening of the image of the tooth
d. shortening of the image of the tooth - ANSWER-b. overlapping of proximal surfaces
Question: Where is the radiographic landmark 'incisive foramen' usually located?
a. maxillary anterior
b. mandibular anterior
c. maxillary posterior
d. mandibular posterior - ANSWER-a. maxillary anterior
Question: Cephalometric radiographs are primarily indicated to evaluate
a. bone loss
Questions and Answers 100% Pass
When taking a panoramic radiograph of an obese patient, as compared to a slim patient,
exposure (kV or mA) a should be
a. be decreased
b. be increased
c. remain the same - ANSWER-b. be increased
Question: The major disadvantage of the bisecting angle technique is that...
a. the film is more difficult to place.
b. image distortion is more likely.
c. the exposure time is significantly longer.
d. the amount of radiation absorbed by the patient is increased. - ANSWER-b. image distortion
is more likely
Question: To reduce cross-comtanation during radiography, the CDC and ADA recommend
that the operators do all of the following EXECPT
a. wear gloves
,b. dispose of saliva- contaminated film packet carefully.
c. use sterilizable or disposable film holders.
d. cover control unit and the tube-head with plastic barrier.
e. take complete medical histories - ANSWER-e. take complete medical histories
Question: Ideally, a lead apron would be used
a. for a full moth series
b. for any dental radiographs
c. if the kV is increased above normal.
d. when the X-ray machine is suspected of malfunctioning. - ANSWER-b. for any dental
radiographs
Question: A full mouth radiographic series has just been processed manually. The operator notes
that the films on the bottom of the rack are of a different density. What could have caused this?
a. developing solution was too cold.
b. developing solution was contaminated
c. fixer solution was reaching exhaustion.
d. solutions were not stirred before processing - ANSWER-d. solutions were not stirred before
processing
Question: A film that has been exposed to scattered radiation will appear
,a. brown
b. fogged
c. green
d. clear - ANSWER-b. fogged
Question: X-ray exposure time should be increased if the patient is
a. very old
b. edentulous
c. large adult
d. very young - ANSWER-c. large adult
Question: Before exposing a panoramic radiograph on a patient, the operator should request the
removal of all of the following EXECPT
a. watch
b. dentures
c. eyeglasses
d. removable bridgework
e. earrings - ANSWER-a. watch
Question: A parent refuses to have radiographs taken on his/her child. The dental assistant
should
, a. explain that the radiographs are necessary for insurance reimbursement
b. inform the dentist and document parent's refusal
c. expose the necessary radiographs without the parents knowledge
d. refer the parent to another dentist - ANSWER-b. inform the dentist and document parent's
refusal
Question: Incorrect horizontal angulation of the primary beam produces
a. overlapping of occlusal surfaces
b. overlapping of proximal surfaces
c. lengthening of the image of the tooth
d. shortening of the image of the tooth - ANSWER-b. overlapping of proximal surfaces
Question: Where is the radiographic landmark 'incisive foramen' usually located?
a. maxillary anterior
b. mandibular anterior
c. maxillary posterior
d. mandibular posterior - ANSWER-a. maxillary anterior
Question: Cephalometric radiographs are primarily indicated to evaluate
a. bone loss
