Final Exam ~ Radiographic Imaging and
Exposure UPDATED ACTUAL Exam
Questions and CORRECT Answers
X-rays have which of the following properties? - CORRECT ANSWER - electrical and
magnetic
Inside the x-ray tube envelope you will find: - CORRECT ANSWER - vacuum
Which of the following is an accurate description of high energy photons? - CORRECT
ANSWER - short wavelength and high frequency
The _______ is the portion of the x-ray tube that contains the filament. - CORRECT
ANSWER - cathode
The cathode filament is made of: - CORRECT ANSWER - tungsten
The frequency of a wave is the number of waves passing a given point per given unit of time.
Frequency is measured in: - CORRECT ANSWER - hertz
_____________ is the phenomenon that occurs around the filament during thermionic emission
and prevents the further escape of electrons from the filament. - CORRECT ANSWER -
Space charge effect
The positive side of the x-ray tube is the: - CORRECT ANSWER - anode
The maximum speed the rotating anode will typically achieve is ______ rpm. - CORRECT
ANSWER - 10,000
,The letter "x" in x-rays is the symbol for: - CORRECT ANSWER - the unknown
The distance between two successive crests of a sine wave is known as: - CORRECT
ANSWER - wavelength
What is the name of the device in a rotating anode x-ray tube that turns the rotor? - CORRECT
ANSWER - Stator
What is defined as the production of an x-ray photon by a collision between the incident electron
and a K-shell electron of the tungsten atom? - CORRECT ANSWER - Characteristic
interaction
_______ is the boiling off of electrons from the filament when current is applied. - CORRECT
ANSWER - Thermionic emission
What process describes x-ray production following the incoming electron electron ejecting an
inner shell electron? - CORRECT ANSWER - Characteristic
The actual flow of electrons from cathode to anode within the x-ray tube is known as: -
CORRECT ANSWER - tube current
Which of the following terms could be defined as the instantaneous production of light only
during an interaction between a type of energy and some element or compound? - CORRECT
ANSWER - Fluorescence
With a standard x-ray tube, ______________% of the x-ray beam produced with 90 kVp is the
result of bremsstrahlung interactions. - CORRECT ANSWER - 85
Filament current is approximately: - CORRECT ANSWER - 3 to 5 A
, Barium platinocyanide was the: - CORRECT ANSWER - fluorescent material that glowed
when the tube was energized
During x-ray production, the energy of the moving electrons is converted into: - CORRECT
ANSWER - electromagnetic energy
(T/F) When an electron from the L-shell of the tungsten atom is ejected from its orbit by a
projectile electron, high-energy x-ray photons are produced. - CORRECT ANSWER -
False, very low energy x-rays are produced when an L-shell electron is ejected from its orbit.
What type of tube was Roentgen working with in his lab when x-rays were discovered? -
CORRECT ANSWER - Crookes tube
In a dual-focus tube, how many filaments are energized at any one-time during x-ray production?
- CORRECT ANSWER - One
What is the correct description of the relationship between the wavelength and frequency of the
x-ray photon? - CORRECT ANSWER - Frequency and wavelength are inversely related
A _______ is a small, discrete bundle of energy - CORRECT ANSWER -
Photon/Quantum
An x-ray beam that has photons with many different energies is: - CORRECT ANSWER -
heterogeneous
X-ray can: - CORRECT ANSWER - - penetrate the human body
- be absorbed in the human body
- change direction in the human body (scattering)
(T/F) X-ray photons travel at the speed of light in a vacuum. - CORRECT ANSWER -
True
Exposure UPDATED ACTUAL Exam
Questions and CORRECT Answers
X-rays have which of the following properties? - CORRECT ANSWER - electrical and
magnetic
Inside the x-ray tube envelope you will find: - CORRECT ANSWER - vacuum
Which of the following is an accurate description of high energy photons? - CORRECT
ANSWER - short wavelength and high frequency
The _______ is the portion of the x-ray tube that contains the filament. - CORRECT
ANSWER - cathode
The cathode filament is made of: - CORRECT ANSWER - tungsten
The frequency of a wave is the number of waves passing a given point per given unit of time.
Frequency is measured in: - CORRECT ANSWER - hertz
_____________ is the phenomenon that occurs around the filament during thermionic emission
and prevents the further escape of electrons from the filament. - CORRECT ANSWER -
Space charge effect
The positive side of the x-ray tube is the: - CORRECT ANSWER - anode
The maximum speed the rotating anode will typically achieve is ______ rpm. - CORRECT
ANSWER - 10,000
,The letter "x" in x-rays is the symbol for: - CORRECT ANSWER - the unknown
The distance between two successive crests of a sine wave is known as: - CORRECT
ANSWER - wavelength
What is the name of the device in a rotating anode x-ray tube that turns the rotor? - CORRECT
ANSWER - Stator
What is defined as the production of an x-ray photon by a collision between the incident electron
and a K-shell electron of the tungsten atom? - CORRECT ANSWER - Characteristic
interaction
_______ is the boiling off of electrons from the filament when current is applied. - CORRECT
ANSWER - Thermionic emission
What process describes x-ray production following the incoming electron electron ejecting an
inner shell electron? - CORRECT ANSWER - Characteristic
The actual flow of electrons from cathode to anode within the x-ray tube is known as: -
CORRECT ANSWER - tube current
Which of the following terms could be defined as the instantaneous production of light only
during an interaction between a type of energy and some element or compound? - CORRECT
ANSWER - Fluorescence
With a standard x-ray tube, ______________% of the x-ray beam produced with 90 kVp is the
result of bremsstrahlung interactions. - CORRECT ANSWER - 85
Filament current is approximately: - CORRECT ANSWER - 3 to 5 A
, Barium platinocyanide was the: - CORRECT ANSWER - fluorescent material that glowed
when the tube was energized
During x-ray production, the energy of the moving electrons is converted into: - CORRECT
ANSWER - electromagnetic energy
(T/F) When an electron from the L-shell of the tungsten atom is ejected from its orbit by a
projectile electron, high-energy x-ray photons are produced. - CORRECT ANSWER -
False, very low energy x-rays are produced when an L-shell electron is ejected from its orbit.
What type of tube was Roentgen working with in his lab when x-rays were discovered? -
CORRECT ANSWER - Crookes tube
In a dual-focus tube, how many filaments are energized at any one-time during x-ray production?
- CORRECT ANSWER - One
What is the correct description of the relationship between the wavelength and frequency of the
x-ray photon? - CORRECT ANSWER - Frequency and wavelength are inversely related
A _______ is a small, discrete bundle of energy - CORRECT ANSWER -
Photon/Quantum
An x-ray beam that has photons with many different energies is: - CORRECT ANSWER -
heterogeneous
X-ray can: - CORRECT ANSWER - - penetrate the human body
- be absorbed in the human body
- change direction in the human body (scattering)
(T/F) X-ray photons travel at the speed of light in a vacuum. - CORRECT ANSWER -
True
