A S S I G N M E N T 1
Textbook Assignment: "Dental Radiology," chapter 1, pages 1-1 through 1-42.
Which of the following scientists first discovered
Wilhelm Konrad Roentgen
Doctor H. G. Gama
Doctor Otto Proton
What is the basic difference between X-rays and
other electromagnetic rays?
Electromagnetic rays travel in wave motion
X-rays are invisible
X-rays are visible
Their wavelengths differ
Which of the following is NOT a characteristic
or property of X-rays?
They travel in straight lines
They travel at the speed of sound
They cause irritation to living cells
They cause certain substances to fluoresce
Which of the following factors control the density of
an X-ray image?
Target film distance (TFD)
All of the above
Which of the following personnel are authorized to
order and diagnostically interpret dental
Dental X-ray technicians
Front desk personnel
When taking radiographs, always drape the patient
with a lead apron.
What speed of film is most commonly used for
The environmental film badge should be placed
behind the lead-lined barrier at least what number of
feet from the tube head?
Which of the following is NOT a safety precaution
for taking radiographs?
Always stand behind a lead screen during an
Never stand in the path of the central X-ray
beam during exposure
Never hold the tube head or the tube head
cylinder of the X-ray machine during exposure
Hold the film packet in the patients mouth
during exposure if necessary
In the dental treatment facility, which of the
following types of dental X-ray units are most