RHS Exam UPDATED ACTUAL Questions
and CORRECT Answers
What are x-rays - CORRECT ANSWER - radiant energy waves that are produced,
charged, and emitted from a common center in the dental radiation tube.
How are x-rays generated? - CORRECT ANSWER - The X-ray tube, also known as a
vacuum tube, produces X-rays. The vacuum tube contains these seven elements of note: cathode,
filament, anode, focal spot, aluminum filter, collimator, aperture
what does the cathode do? - CORRECT ANSWER - electrode in the X-ray tube that is the
electron source.
What does the filament do? - CORRECT ANSWER - tungsten coil in the cathode focusing
cup that heats up to generate the electrons.
what does the anode do? - CORRECT ANSWER - the target for the electron cloud that
converts the electron force into photons.
what does the focal spot do? - CORRECT ANSWER - target area on the anode where rays
are projected to make the primary beam, or central beam; the smaller focal spot produces a better
image.
what does the aluminum filter do? - CORRECT ANSWER - aluminum disks that are
placed between the collimator attachment and the exit window of the tube to absorb weak
radiation.
what does the collimator do? - CORRECT ANSWER - a lead device inside the X-ray
tubehead used to restrict the size and shape of the X-ray beam, helping to avoid stray radiation.
What does the aperture do? - CORRECT ANSWER - opening in the lead collimator disk
that regulates the size of the primary beam.
, What is PID? - CORRECT ANSWER - position indicating device
What is the purpose of a periapical radiograph? - CORRECT ANSWER - size 0
(pedodontic size), 1 (adult anterior), or 2 (adult anterior and posterior); used for the intraoral
periapical view of the entire tooth or teeth in a given area along with adjacent tissues and oral
structures.
What is the purpose of a bitewing radiograph? - CORRECT ANSWER - film used to
record crown and interproximal views of both arches while in occlusion; used intraorally with
attached bite tab.
what is the purpose of taking a full mouth series of x-rays? - CORRECT ANSWER -
multiple exposures of the oral cavity showing crown and root area in a series of radiographic
views. When arranged in proper sequence, these films or images give a survey or view of the
condition of the entire mouth
What is the purpose of an occlusal x-ray? - CORRECT ANSWER - size 4; film that may
be used intraorally or extraorally to expose large areas
What is the purpose of taking a panoramic x-ray? - CORRECT ANSWER - a special
radiograph capturing a view of the entire dentition with the surrounding structures on one film.
What is the purpose of a Cephalometric radiograph? - CORRECT ANSWER - also called
headplates. These extraoral radiographs of the head are used in orthodontic, oral surgery, and
sometimes in prosthodontic dentistry.
What is the purpose of a CBCT (cone-beam computed tomography) - CORRECT
ANSWER -
Identify radiographs used to examine or view specific conditions, teeth or landmarks. -
CORRECT ANSWER -
and CORRECT Answers
What are x-rays - CORRECT ANSWER - radiant energy waves that are produced,
charged, and emitted from a common center in the dental radiation tube.
How are x-rays generated? - CORRECT ANSWER - The X-ray tube, also known as a
vacuum tube, produces X-rays. The vacuum tube contains these seven elements of note: cathode,
filament, anode, focal spot, aluminum filter, collimator, aperture
what does the cathode do? - CORRECT ANSWER - electrode in the X-ray tube that is the
electron source.
What does the filament do? - CORRECT ANSWER - tungsten coil in the cathode focusing
cup that heats up to generate the electrons.
what does the anode do? - CORRECT ANSWER - the target for the electron cloud that
converts the electron force into photons.
what does the focal spot do? - CORRECT ANSWER - target area on the anode where rays
are projected to make the primary beam, or central beam; the smaller focal spot produces a better
image.
what does the aluminum filter do? - CORRECT ANSWER - aluminum disks that are
placed between the collimator attachment and the exit window of the tube to absorb weak
radiation.
what does the collimator do? - CORRECT ANSWER - a lead device inside the X-ray
tubehead used to restrict the size and shape of the X-ray beam, helping to avoid stray radiation.
What does the aperture do? - CORRECT ANSWER - opening in the lead collimator disk
that regulates the size of the primary beam.
, What is PID? - CORRECT ANSWER - position indicating device
What is the purpose of a periapical radiograph? - CORRECT ANSWER - size 0
(pedodontic size), 1 (adult anterior), or 2 (adult anterior and posterior); used for the intraoral
periapical view of the entire tooth or teeth in a given area along with adjacent tissues and oral
structures.
What is the purpose of a bitewing radiograph? - CORRECT ANSWER - film used to
record crown and interproximal views of both arches while in occlusion; used intraorally with
attached bite tab.
what is the purpose of taking a full mouth series of x-rays? - CORRECT ANSWER -
multiple exposures of the oral cavity showing crown and root area in a series of radiographic
views. When arranged in proper sequence, these films or images give a survey or view of the
condition of the entire mouth
What is the purpose of an occlusal x-ray? - CORRECT ANSWER - size 4; film that may
be used intraorally or extraorally to expose large areas
What is the purpose of taking a panoramic x-ray? - CORRECT ANSWER - a special
radiograph capturing a view of the entire dentition with the surrounding structures on one film.
What is the purpose of a Cephalometric radiograph? - CORRECT ANSWER - also called
headplates. These extraoral radiographs of the head are used in orthodontic, oral surgery, and
sometimes in prosthodontic dentistry.
What is the purpose of a CBCT (cone-beam computed tomography) - CORRECT
ANSWER -
Identify radiographs used to examine or view specific conditions, teeth or landmarks. -
CORRECT ANSWER -
