©SOPHIABENNET@2024/2025 Tuesday, August 20, 2024 10:21 AM
Dental Radiology Exam Practice
Questions and Answers (100% Pass)
3 requirements for NJ State Dental Radiology Technology exam -
Answer✔️✔️-18 years old
high school diploma or equivalency (GED)
NJ State approved 45 hour course including required hours of clinical
practice
Who discovered x-rays? - Answer✔️✔️-Dr. Wilhelm Conrad Roentgen
aka: Wilhelm VonRoentgen
When was x-rays discovered? - Answer✔️✔️-1895
Who was Dr. Otto Walkoff? - Answer✔️✔️-German dentist in 1896; first to
use x-rays for dental
Who was Dr. Edmund Kells? - Answer✔️✔️-first American dentist to use x-
rays
Who was Cyzinski? - Answer✔️✔️-developed the bisecting angle technique
What are x-rays? - Answer✔️✔️-electromagnetic radiation (EMR)
What determines the penetrating power of various EMR? - Answer✔️✔️-
wavelength
What do medical EMR rays fall under? - Answer✔️✔️-gamma rays
1
,©SOPHIABENNET@2024/2025 Tuesday, August 20, 2024 10:21 AM
Principle characteristics of EMR(4): - Answer✔️✔️-~travels at speed of
light(186,000 miles/second)
~pure energy- no mass or weight
~travels through space in wave motions
~electric and magnetic fields surround them as they travel through space
What are wavelengths? - Answer✔️✔️-distance between successive peaks
along a wave
What is frequency? - Answer✔️✔️-oscillations emitted per second
What are oscillations? - Answer✔️✔️-number of wavelengths
shorter wavelengths have - Answer✔️✔️-higher frequencies and more
penetrating rays
What are red rays? - Answer✔️✔️-Longest wavelengths in visible spectrum
What are violet rays? - Answer✔️✔️-shorter wavelengths
What are invisible rays? - Answer✔️✔️-shortest wavelength, beyond the
visible threshold
ex: x-rays
The angstrom unit is used to measure... - Answer✔️✔️-wavelength
one hundred millionth of a centimeter
x-rays used in dentistry fall between what angstrom units - Answer✔️✔️-.5-1
angstrom unit
2
, ©SOPHIABENNET@2024/2025 Tuesday, August 20, 2024 10:21 AM
What is hard radiation? - Answer✔️✔️-x-rays of shorter wavelength, used in
dentistry
What is soft radiation? - Answer✔️✔️-x-rays of longer wavelength, can't
penetrate tissues
When is EMR produced? - Answer✔️✔️-when electrons strike a metal target
in a vacuum tube
Cathode - Answer✔️✔️-negatively charged component which contains a
filament wire coil made of tungsten metal
Anode - Answer✔️✔️-Positively charged component containing a target
made of tungsten metal (aka a Wolfram target)
Focal spot - Answer✔️✔️-the small area on the target of the anode where
electrons are directed
Focusing cup - Answer✔️✔️-negatively charged metal cup directs electrons
to the target
made of molybdenum
aperture/porte - Answer✔️✔️-opening in x-ray tube for exit of photons
copper stem heat radiator - Answer✔️✔️-passes electrons that turned into
heat into oil bath to be cooled
High Voltage Circuit - Answer✔️✔️-kVp- connected to the anode and
cathode
3
Dental Radiology Exam Practice
Questions and Answers (100% Pass)
3 requirements for NJ State Dental Radiology Technology exam -
Answer✔️✔️-18 years old
high school diploma or equivalency (GED)
NJ State approved 45 hour course including required hours of clinical
practice
Who discovered x-rays? - Answer✔️✔️-Dr. Wilhelm Conrad Roentgen
aka: Wilhelm VonRoentgen
When was x-rays discovered? - Answer✔️✔️-1895
Who was Dr. Otto Walkoff? - Answer✔️✔️-German dentist in 1896; first to
use x-rays for dental
Who was Dr. Edmund Kells? - Answer✔️✔️-first American dentist to use x-
rays
Who was Cyzinski? - Answer✔️✔️-developed the bisecting angle technique
What are x-rays? - Answer✔️✔️-electromagnetic radiation (EMR)
What determines the penetrating power of various EMR? - Answer✔️✔️-
wavelength
What do medical EMR rays fall under? - Answer✔️✔️-gamma rays
1
,©SOPHIABENNET@2024/2025 Tuesday, August 20, 2024 10:21 AM
Principle characteristics of EMR(4): - Answer✔️✔️-~travels at speed of
light(186,000 miles/second)
~pure energy- no mass or weight
~travels through space in wave motions
~electric and magnetic fields surround them as they travel through space
What are wavelengths? - Answer✔️✔️-distance between successive peaks
along a wave
What is frequency? - Answer✔️✔️-oscillations emitted per second
What are oscillations? - Answer✔️✔️-number of wavelengths
shorter wavelengths have - Answer✔️✔️-higher frequencies and more
penetrating rays
What are red rays? - Answer✔️✔️-Longest wavelengths in visible spectrum
What are violet rays? - Answer✔️✔️-shorter wavelengths
What are invisible rays? - Answer✔️✔️-shortest wavelength, beyond the
visible threshold
ex: x-rays
The angstrom unit is used to measure... - Answer✔️✔️-wavelength
one hundred millionth of a centimeter
x-rays used in dentistry fall between what angstrom units - Answer✔️✔️-.5-1
angstrom unit
2
, ©SOPHIABENNET@2024/2025 Tuesday, August 20, 2024 10:21 AM
What is hard radiation? - Answer✔️✔️-x-rays of shorter wavelength, used in
dentistry
What is soft radiation? - Answer✔️✔️-x-rays of longer wavelength, can't
penetrate tissues
When is EMR produced? - Answer✔️✔️-when electrons strike a metal target
in a vacuum tube
Cathode - Answer✔️✔️-negatively charged component which contains a
filament wire coil made of tungsten metal
Anode - Answer✔️✔️-Positively charged component containing a target
made of tungsten metal (aka a Wolfram target)
Focal spot - Answer✔️✔️-the small area on the target of the anode where
electrons are directed
Focusing cup - Answer✔️✔️-negatively charged metal cup directs electrons
to the target
made of molybdenum
aperture/porte - Answer✔️✔️-opening in x-ray tube for exit of photons
copper stem heat radiator - Answer✔️✔️-passes electrons that turned into
heat into oil bath to be cooled
High Voltage Circuit - Answer✔️✔️-kVp- connected to the anode and
cathode
3
