4/12/25, 7:11
PM
DENTAL RADIOLOGY ACTUAL EXAM QUESTIONS
AND ANSWERS WITH COMPLETE SOLUTIONS
VERIFIED
Leave the first rating
Save
Practice questions for this set
Learn 1/7 Study using Learn
When was x-rays discovered?
Select the correct definition
11920 21905
31885 41895
Don't know?
Terms in this set (120)
18 years old
3 requirements for NJ State Dental
high school diploma or equivalency (GED)
Radiology Technology exam
NJ State approved 45 hour course including required hours of clinical practice
Dr. Wilhelm Conrad Roentgen
Who discovered x-rays?
aka: Wilhelm VonRoentgen
When was x-rays discovered? 1895
Who was Dr. Otto Walkoff? German dentist in 1896; first to use x-rays for dental
Who was Dr. Edmund Kells? first American dentist to use x-rays
Who was Cyzinski? developed the bisecting angle technique
1/
6
, 4/12/25, 7:11
PM
What are x-rays? electromagnetic radiation (EMR)
What determines the penetrating power wavelength
of various EMR?
What do medical EMR rays fall under? gamma rays
~travels at speed of light(186,000 miles/second)
~pure energy- no mass or weight
Principle characteristics of EMR(4):
~travels through space in wave motions
~electric and magnetic fields surround them as they travel through space
What are wavelengths? distance between successive peaks along a wave
What is frequency? oscillations emitted per second
What are oscillations? number of wavelengths
shorter wavelengths have higher frequencies and more penetrating rays
What are red rays? Longest wavelengths in visible spectrum
What are violet rays? shorter wavelengths
shortest wavelength, beyond the visible threshold
What are invisible rays?
ex: x-rays
wavelength
The angstrom unit is used to measure...
one hundred millionth of a centimeter
x-rays used in dentistry fall between what .5-1 angstrom unit
angstrom units
What is hard radiation? x-rays of shorter wavelength, used in dentistry
What is soft radiation? x-rays of longer wavelength, can't penetrate tissues
When is EMR produced? when electrons strike a metal target in a vacuum tube
negatively charged component which contains a filament wire coil made of
Cathode
tungsten metal
Positively charged component containing a target made of tungsten metal (aka a
Anode
Wolfram target)
Focal spot the small area on the target of the anode where electrons are directed
negatively charged metal cup directs electrons to the target
Focusing cup
made of molybdenum
aperture/porte opening in x-ray tube for exit of photons
copper stem heat radiator passes electrons that turned into heat into oil bath to be cooled
High Voltage Circuit kVp- connected to the anode and cathode
kilovolt
peak 1000
kVp- 3 things it does volts
~determines anode is positive and cathode is negative
~regulates speed of electrons
~controls quality of x-ray beam
Higher kVp means greater speed, shorter wavelength, more pentrating x-ray
mA
Low Voltage Circuit connected to cathode
amount of electric current flowing through a circuit
milliamperes: 1/1000 of an ampere
mA- 2 things it does ~determines number of x-rays produced
~heats the cathode
higher mA means hotter coil, more electrons produced
2/
6
PM
DENTAL RADIOLOGY ACTUAL EXAM QUESTIONS
AND ANSWERS WITH COMPLETE SOLUTIONS
VERIFIED
Leave the first rating
Save
Practice questions for this set
Learn 1/7 Study using Learn
When was x-rays discovered?
Select the correct definition
11920 21905
31885 41895
Don't know?
Terms in this set (120)
18 years old
3 requirements for NJ State Dental
high school diploma or equivalency (GED)
Radiology Technology exam
NJ State approved 45 hour course including required hours of clinical practice
Dr. Wilhelm Conrad Roentgen
Who discovered x-rays?
aka: Wilhelm VonRoentgen
When was x-rays discovered? 1895
Who was Dr. Otto Walkoff? German dentist in 1896; first to use x-rays for dental
Who was Dr. Edmund Kells? first American dentist to use x-rays
Who was Cyzinski? developed the bisecting angle technique
1/
6
, 4/12/25, 7:11
PM
What are x-rays? electromagnetic radiation (EMR)
What determines the penetrating power wavelength
of various EMR?
What do medical EMR rays fall under? gamma rays
~travels at speed of light(186,000 miles/second)
~pure energy- no mass or weight
Principle characteristics of EMR(4):
~travels through space in wave motions
~electric and magnetic fields surround them as they travel through space
What are wavelengths? distance between successive peaks along a wave
What is frequency? oscillations emitted per second
What are oscillations? number of wavelengths
shorter wavelengths have higher frequencies and more penetrating rays
What are red rays? Longest wavelengths in visible spectrum
What are violet rays? shorter wavelengths
shortest wavelength, beyond the visible threshold
What are invisible rays?
ex: x-rays
wavelength
The angstrom unit is used to measure...
one hundred millionth of a centimeter
x-rays used in dentistry fall between what .5-1 angstrom unit
angstrom units
What is hard radiation? x-rays of shorter wavelength, used in dentistry
What is soft radiation? x-rays of longer wavelength, can't penetrate tissues
When is EMR produced? when electrons strike a metal target in a vacuum tube
negatively charged component which contains a filament wire coil made of
Cathode
tungsten metal
Positively charged component containing a target made of tungsten metal (aka a
Anode
Wolfram target)
Focal spot the small area on the target of the anode where electrons are directed
negatively charged metal cup directs electrons to the target
Focusing cup
made of molybdenum
aperture/porte opening in x-ray tube for exit of photons
copper stem heat radiator passes electrons that turned into heat into oil bath to be cooled
High Voltage Circuit kVp- connected to the anode and cathode
kilovolt
peak 1000
kVp- 3 things it does volts
~determines anode is positive and cathode is negative
~regulates speed of electrons
~controls quality of x-ray beam
Higher kVp means greater speed, shorter wavelength, more pentrating x-ray
mA
Low Voltage Circuit connected to cathode
amount of electric current flowing through a circuit
milliamperes: 1/1000 of an ampere
mA- 2 things it does ~determines number of x-rays produced
~heats the cathode
higher mA means hotter coil, more electrons produced
2/
6
