NEW TCDHA RAD MIDTERM ONE EXAM QUESTIONS AND
100% CORRECT ANSWERS (A+)
When adjusting vertical angulation, if the PID is placed above the occlusal plane and the
central ray is directed ________, the vertical angulation is referred to as ____________. -
ANSWER Downward; positive
Where would you place the meisal edge of the receptor when taking a premolar
bite-wing image? - ANSWER Midline of the mandibular canine
Where do you place the mesial edge of the receptor when capturing a molar bitewing
image? - ANSWER Distal of the mandibular first premolar
What degree of vertical angulation do you use when positioning the PID for bite-wing
exposures with bitetabs? - ANSWER +10 Degrees
A stream of energy with the capability of penetrating objects and recording the shadows
of those objects on the image receptor is. - ANSWER An x-ray
Radiology - ANSWER A medical specialty concerned with the use of x-rays
X-radiation is a high-energy radiation produced by. - ANSWER The collision of a beam of
electrons with a metal target in an X-ray tube.
Who in 1870 observed that discharges emitted from the negative electrode of a vacuum
tube travelled in straight lines, produced heat and caused a greenish fluorescence. -
ANSWER Johann Hittorf in 1870
William Crookes discovered. - ANSWER That cathode rays were streams of charged
particles; 1870s
, Who INTRODUCED the paralleling technique? - ANSWER C. Edmund Kells (1896)
Who MODIFIED the BISECTING technique and introduced the bite-wing technique? -
ANSWER Howard Riley Raper (1925)
What is an image? - ANSWER Is a picture or likeness of an object
A radiograph is. - ANSWER An image of two-dimensional representation of a
three-dimensional object.
A DENTAL radiograph is. - ANSWER Is the dental image produced on a recording
medium
TRUE OR FALSE:
The outer shells are stronger than the inner shells? - ANSWER FALSE!
Inner shells are stronger
What are fast-moving electrons emitted from the nucleus of radioactive atoms? -
ANSWER Beta Particles
What is radioactivity? - ANSWER The process by which certain unstable atoms or
elements undergo spontaneous disintegration, or decay, in effort to attain a more
balanced nuclear state.
_____ Particles are emitted from nuclei of heavy metals. - ANSWER ALPHA
_______ are accelerated particles with a mass of _____ and a charge of _____ - ANSWER
Protons; 1; +1
100% CORRECT ANSWERS (A+)
When adjusting vertical angulation, if the PID is placed above the occlusal plane and the
central ray is directed ________, the vertical angulation is referred to as ____________. -
ANSWER Downward; positive
Where would you place the meisal edge of the receptor when taking a premolar
bite-wing image? - ANSWER Midline of the mandibular canine
Where do you place the mesial edge of the receptor when capturing a molar bitewing
image? - ANSWER Distal of the mandibular first premolar
What degree of vertical angulation do you use when positioning the PID for bite-wing
exposures with bitetabs? - ANSWER +10 Degrees
A stream of energy with the capability of penetrating objects and recording the shadows
of those objects on the image receptor is. - ANSWER An x-ray
Radiology - ANSWER A medical specialty concerned with the use of x-rays
X-radiation is a high-energy radiation produced by. - ANSWER The collision of a beam of
electrons with a metal target in an X-ray tube.
Who in 1870 observed that discharges emitted from the negative electrode of a vacuum
tube travelled in straight lines, produced heat and caused a greenish fluorescence. -
ANSWER Johann Hittorf in 1870
William Crookes discovered. - ANSWER That cathode rays were streams of charged
particles; 1870s
, Who INTRODUCED the paralleling technique? - ANSWER C. Edmund Kells (1896)
Who MODIFIED the BISECTING technique and introduced the bite-wing technique? -
ANSWER Howard Riley Raper (1925)
What is an image? - ANSWER Is a picture or likeness of an object
A radiograph is. - ANSWER An image of two-dimensional representation of a
three-dimensional object.
A DENTAL radiograph is. - ANSWER Is the dental image produced on a recording
medium
TRUE OR FALSE:
The outer shells are stronger than the inner shells? - ANSWER FALSE!
Inner shells are stronger
What are fast-moving electrons emitted from the nucleus of radioactive atoms? -
ANSWER Beta Particles
What is radioactivity? - ANSWER The process by which certain unstable atoms or
elements undergo spontaneous disintegration, or decay, in effort to attain a more
balanced nuclear state.
_____ Particles are emitted from nuclei of heavy metals. - ANSWER ALPHA
_______ are accelerated particles with a mass of _____ and a charge of _____ - ANSWER
Protons; 1; +1
