DHYG 1304 - Exam 1 Questions with Correct Answers Latest Update 2025
the PID is sometimes called a "cone" because the PID of early dental xray machines was of a
pointed shape - Answers both statement and reason are correct and related
the purpose of aluminum filtration is to - Answers absorb the less penetrating long wavelengths
to reduce radiation exposure
t/f: computed tomography eliminates the use of radiation to produce an image - Answers false
the amount of energy deposited in the teeth or soft tissue by any type of radiation is called the -
Answers absorbed dose
t/f: a small area on the tungsten target of the anode toward which the electron beam is directed
is called the "focal spot" - Answers true
dental xray machines contain each of the following components except one. which one is the
exception? - Answers radioactive material
t/f: xrays make the materials they pass through radioactive - Answers false
each of the following is an advantage of digital imaging except one. which one is the exception?
- Answers it allows the use of pointed cones without radiation hazards
guidelines for prescribing radiographs are based on - Answers all of these
how many electrical circuits are used in a dental xray machine? - Answers 2
amperage measures the electric potential or force that moves electrons along a conductor.
increasing the force with which the electrons move increases the penetrating potential of the
xray beam. - Answers the first statement is false. the second statement is true
the first dental radiograph was produced using an exposure time of - Answers 25 minutes
t/f: thermionic emission refers to the release of electrons from the target material during the
process of incandescence - Answers true
xrays originate at the - Answers focal spot
dental assistants and dental hygienists meet an important need by providing each of the
following except one. which one is the exception? - Answers prescribing radiographs
t/f: the PID is used to direct the useful beam of radiation - Answers true
the wavelength determines the energy and penetrating power of the radiation. the longer the
wavelength, the higher the energy of the radiation - Answers both statements are true
radiation is best described as a - Answers movement of energy
the PID is sometimes called a "cone" because the PID of early dental xray machines was of a
pointed shape - Answers both statement and reason are correct and related
the purpose of aluminum filtration is to - Answers absorb the less penetrating long wavelengths
to reduce radiation exposure
t/f: computed tomography eliminates the use of radiation to produce an image - Answers false
the amount of energy deposited in the teeth or soft tissue by any type of radiation is called the -
Answers absorbed dose
t/f: a small area on the tungsten target of the anode toward which the electron beam is directed
is called the "focal spot" - Answers true
dental xray machines contain each of the following components except one. which one is the
exception? - Answers radioactive material
t/f: xrays make the materials they pass through radioactive - Answers false
each of the following is an advantage of digital imaging except one. which one is the exception?
- Answers it allows the use of pointed cones without radiation hazards
guidelines for prescribing radiographs are based on - Answers all of these
how many electrical circuits are used in a dental xray machine? - Answers 2
amperage measures the electric potential or force that moves electrons along a conductor.
increasing the force with which the electrons move increases the penetrating potential of the
xray beam. - Answers the first statement is false. the second statement is true
the first dental radiograph was produced using an exposure time of - Answers 25 minutes
t/f: thermionic emission refers to the release of electrons from the target material during the
process of incandescence - Answers true
xrays originate at the - Answers focal spot
dental assistants and dental hygienists meet an important need by providing each of the
following except one. which one is the exception? - Answers prescribing radiographs
t/f: the PID is used to direct the useful beam of radiation - Answers true
the wavelength determines the energy and penetrating power of the radiation. the longer the
wavelength, the higher the energy of the radiation - Answers both statements are true
radiation is best described as a - Answers movement of energy
