Test Bank - Chapter 38 Exam
Questions and Answers
The Guidelines for Prescribing Dental Radiographs issued by the American Dental
Association and the FDA recommend which of the following dental imaging
procedures for a pregnant patient? - Answer-Radiographic imaging procedures do
not need to be altered because of pregnancy
One of the rules of radiation protection is never stand closer than ______ feet from
the x-ray unit during an exposure unless you are behind a barrier. - Answer-6
Dental imaging refers to: - Answer-film-based images, digitally produces images &
detects conditions that might otherwise remain undetected
All the following are true of electromagnetic radiation except they - Answer-contain
radioactive substances such as uranium
Which of the following is the name for the primary kind of radiation produced in the
dental x-ray tubehead? - Answer-Braking radiation
The portion of the x-ray machine that supplies the electrons to produce x-rays is the -
Answer-cathode
If you change the exposure time of the x-ray unit, what is affected? - Answer-Number
of x-rays produced
The penetrating power of the x-ray beam is controlled by the settings on the -
Answer-kilovolt setting
A step-down transformer is necessary within the x-ray circuitry to - Answer-boil off
electrons from the filament
What is the purpose of the insulating oil that fills the x-ray machine housing and
surrounds the x-ray tube? - Answer-Absorbs heat created by the production of x-rays
Thermionic emission refers to the - Answer-release of electrons form the tungsten
filament
The lead collimator is used to - Answer-restrict the size and shape of the primary
beam
How much filtration is federally required for a dental x-ray machine operating over 70
kVp? - Answer-2.5 mm
The function of the _________ filter in the x-ray tube is to ____________________. -
Answer-Aluminum; remove long wavelengths from the beam
Questions and Answers
The Guidelines for Prescribing Dental Radiographs issued by the American Dental
Association and the FDA recommend which of the following dental imaging
procedures for a pregnant patient? - Answer-Radiographic imaging procedures do
not need to be altered because of pregnancy
One of the rules of radiation protection is never stand closer than ______ feet from
the x-ray unit during an exposure unless you are behind a barrier. - Answer-6
Dental imaging refers to: - Answer-film-based images, digitally produces images &
detects conditions that might otherwise remain undetected
All the following are true of electromagnetic radiation except they - Answer-contain
radioactive substances such as uranium
Which of the following is the name for the primary kind of radiation produced in the
dental x-ray tubehead? - Answer-Braking radiation
The portion of the x-ray machine that supplies the electrons to produce x-rays is the -
Answer-cathode
If you change the exposure time of the x-ray unit, what is affected? - Answer-Number
of x-rays produced
The penetrating power of the x-ray beam is controlled by the settings on the -
Answer-kilovolt setting
A step-down transformer is necessary within the x-ray circuitry to - Answer-boil off
electrons from the filament
What is the purpose of the insulating oil that fills the x-ray machine housing and
surrounds the x-ray tube? - Answer-Absorbs heat created by the production of x-rays
Thermionic emission refers to the - Answer-release of electrons form the tungsten
filament
The lead collimator is used to - Answer-restrict the size and shape of the primary
beam
How much filtration is federally required for a dental x-ray machine operating over 70
kVp? - Answer-2.5 mm
The function of the _________ filter in the x-ray tube is to ____________________. -
Answer-Aluminum; remove long wavelengths from the beam
