Radiation Health and Safety EXAM
A parent refuses for i have radiographs taken on his/her child. The dental assistant
should - CORRECT ANSWER-Inform the dentist and document Parent's refusal
Incorrect horizontal angulation of the primary beam produces - CORRECT ANSWER-
Overlapping of proximal surfaces
Where is the radiographic landmark incisive foramen usually located - CORRECT
ANSWER-Maxillary anterior
Cephalometric radiographs are primarily indicated to evaluate - CORRECT ANSWER-
Jaw relationships
When taking a panoramic radiograph, the patient's head should be oriented -
CORRECT ANSWER-with the midsagittal plane perpendicular to the floor
Which of the following is MOST likely to contribute to the fogging of x - ray film -
CORRECT ANSWER-light leaks in the dark room
Which of the following conditions will result in a radiographic image that is too light? -
CORRECT ANSWER-Weak developing solution
When taking a panoramic radiograph of an obese patient, as compared to a slim
patient, exposure (kVp or mA) should - CORRECT ANSWER-to be increased
The major disadvantage of the bisecting angle technique is that - CORRECT ANSWER-
Image distortion is more likely
The reduce cross - contamination during radiography, the CDC and ADA recommended
that the operators do all of the following EXCEPT - CORRECT ANSWER-Take
complete medical histories
Ideally, a lead apron would be used - CORRECT ANSWER-For any dental radiographs
A full mouth radiographic series has just been processed manually. The operator notes
that the films on the button of the rack are of different density. What could have caused
this? - CORRECT ANSWER-Solutions were not stirred before processing
A film that has been exposed to scattered radiation will appear - CORRECT ANSWER-
Fogged
, X-ray exposure time should be increased if the patient is - CORRECT ANSWER-A large
adult
Before exposing a panoramic radiograph on a patient, the operator should request the
removal of all of the following EXCEPT: - CORRECT ANSWER-Watch
The purpose of using film - holding devices when taking intraoral radiographs is to -
CORRECT ANSWER-Assist in correct film placement
A film with thin density and a herringbone pattern across it is the result of: - CORRECT
ANSWER-Film packet reversal
A full mouth radiographic survey has just been processed manually. The top films on
the processing rack have a straight, clear border on the upper edge. This error is
caused by - CORRECT ANSWER-Too low a level of developer solution
Using a faster speed film requires - CORRECT ANSWER-shorter exposure time
The life expectancy of radiographic processing solution depends upon all of the
following EXCEPT - CORRECT ANSWER-temperature of the solution
Insufficient washing of processed radiographic film will result in a - CORRECT
ANSWER-Brownish - yellow stain on the radiograph
A radiograph turns brown over time. The MOST likely cause is - CORRECT ANSWER-
Under washing
When processing a radiograph, the darkroom overhead light was off, the safety light
was on, and the door was slightly open. What effect will exposure to minor amounts of
room light have on the processed radiograph? It will appear - CORRECT ANSWER-
Black
Density of a radiograph is controlled by all of the following EXCEPT - CORRECT
ANSWER-OFD [[object film distance]]
Which method is considered MOST effective for handling and processing radiographs to
prevent microbial contamination? - CORRECT ANSWER-cover with barrier envelopes
A person exposing x-rays can BEST be protected from scattered radiation by -
CORRECT ANSWER-standing behind a lead barrier
Radiographs mounted with the raised portions of the dots toward the observer (labial
mounting) are examined as though the observer is - CORRECT ANSWER-Outside the
mouth looking in
A parent refuses for i have radiographs taken on his/her child. The dental assistant
should - CORRECT ANSWER-Inform the dentist and document Parent's refusal
Incorrect horizontal angulation of the primary beam produces - CORRECT ANSWER-
Overlapping of proximal surfaces
Where is the radiographic landmark incisive foramen usually located - CORRECT
ANSWER-Maxillary anterior
Cephalometric radiographs are primarily indicated to evaluate - CORRECT ANSWER-
Jaw relationships
When taking a panoramic radiograph, the patient's head should be oriented -
CORRECT ANSWER-with the midsagittal plane perpendicular to the floor
Which of the following is MOST likely to contribute to the fogging of x - ray film -
CORRECT ANSWER-light leaks in the dark room
Which of the following conditions will result in a radiographic image that is too light? -
CORRECT ANSWER-Weak developing solution
When taking a panoramic radiograph of an obese patient, as compared to a slim
patient, exposure (kVp or mA) should - CORRECT ANSWER-to be increased
The major disadvantage of the bisecting angle technique is that - CORRECT ANSWER-
Image distortion is more likely
The reduce cross - contamination during radiography, the CDC and ADA recommended
that the operators do all of the following EXCEPT - CORRECT ANSWER-Take
complete medical histories
Ideally, a lead apron would be used - CORRECT ANSWER-For any dental radiographs
A full mouth radiographic series has just been processed manually. The operator notes
that the films on the button of the rack are of different density. What could have caused
this? - CORRECT ANSWER-Solutions were not stirred before processing
A film that has been exposed to scattered radiation will appear - CORRECT ANSWER-
Fogged
, X-ray exposure time should be increased if the patient is - CORRECT ANSWER-A large
adult
Before exposing a panoramic radiograph on a patient, the operator should request the
removal of all of the following EXCEPT: - CORRECT ANSWER-Watch
The purpose of using film - holding devices when taking intraoral radiographs is to -
CORRECT ANSWER-Assist in correct film placement
A film with thin density and a herringbone pattern across it is the result of: - CORRECT
ANSWER-Film packet reversal
A full mouth radiographic survey has just been processed manually. The top films on
the processing rack have a straight, clear border on the upper edge. This error is
caused by - CORRECT ANSWER-Too low a level of developer solution
Using a faster speed film requires - CORRECT ANSWER-shorter exposure time
The life expectancy of radiographic processing solution depends upon all of the
following EXCEPT - CORRECT ANSWER-temperature of the solution
Insufficient washing of processed radiographic film will result in a - CORRECT
ANSWER-Brownish - yellow stain on the radiograph
A radiograph turns brown over time. The MOST likely cause is - CORRECT ANSWER-
Under washing
When processing a radiograph, the darkroom overhead light was off, the safety light
was on, and the door was slightly open. What effect will exposure to minor amounts of
room light have on the processed radiograph? It will appear - CORRECT ANSWER-
Black
Density of a radiograph is controlled by all of the following EXCEPT - CORRECT
ANSWER-OFD [[object film distance]]
Which method is considered MOST effective for handling and processing radiographs to
prevent microbial contamination? - CORRECT ANSWER-cover with barrier envelopes
A person exposing x-rays can BEST be protected from scattered radiation by -
CORRECT ANSWER-standing behind a lead barrier
Radiographs mounted with the raised portions of the dots toward the observer (labial
mounting) are examined as though the observer is - CORRECT ANSWER-Outside the
mouth looking in
