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Which part of the nucleus has no charge?
Neutron
Which of the following is responsible for most of the scattered radiation in the diagnostic range?
Thompson effect (photon skipping)
Bremsstrahlung radiation
Photoelectric effect
Compton scattering effect
Compton scattering effect
Who is given credit for originally describing what an atom looks like?
Neils Bohr
X-rays are classified as what type of radiation?
a. Expansion
b. sound
c. destructive
d. electromagnetic
Electromagnetic
Which of the following meters does not register until an x-ray exposure is made?
Kilovolt
Milliammeter
Prereading kilovolt
Prereading ammeter
Milliammeter
When were x-rays discovered and by whom?
November 8, 1895 by Wilhelm Roentgen
Which of the following would not be found in the nucleus of an atom?
Electron
Which of the following is the filtration that is manufactured into the x-ray tube?
Added filtration
Compensating filtration
Adjusted filtration
Inherent filtration
Inherent filtration
Which of the following does not affect the attenuation of an x-ray beam?
Scatter
Speed
Distance
Absorption
Distance
Which of the following represents a high energy x-ray photon?
Short wavelength
Long wavelength
Low frequency
High speed
Short wavelength
Which of the following x-ray units will have the least amount of voltage ripple?
Self wave rectified dental unit
Capacitor discharge mobile unit
Full wave rectified fluoroscopy
Three phase tomographic
Capacitor discharge mobile unit
Which of the following is equal on all electromagnetic radiations?
Frequency
Speed
Amplitude
Wavelength
Speed
Which of the following is NOT a property of x-rays?
Travel in straight lines
Produces biological changes
Travel at the speed of light
Negatively charged
Negatively charged
Which of the following parts would make us the cathode end of the x-ray tube?
Filaments and focusing cup
Filament and rotor
Rotor and rotating disc
Rotor, rotating cup and target
Filament and focusing cup
Which of the following types of current supplies the x-ray tube?
Pulsating direct current
What type of motor drives the rotating anode?
Inductive reactance
Direct current
Inductive
Synchronous
Induction
When electrons strike the target of an x-ray tube moist of their energy is converted to what?
Light
Gamma rays
Heat
X-rays
Heat
Which of the following is most likely to damage the x-ray tube?
High kVp
High mA
Exceeding the tube rating chart
Long exposures
Exceeding the tube rating chart
Where in the X-ray circuit is the timer located?
Between rectifier and x-ray tube
Before the step down transformer
Between autotransformer and step up transformer
In the secondary circuit
Between the autotransformer and step up transformer
Which of the following types of tubes is used in modern radiographic equipment?
Coolidge tube
Which of the following pertains to atoms that have their outer electron shell completely filled?
Chemically inert
Strongly ionized
Tightly bonded
Purely electrified
Chemically inert
What is used to focus the electron stream towards the target of the anode?
Focusing lens
Molybdenum focusing cup
Copper anode
Lead collar
Molybdenum focusing cup
Which of the following electromagnetic waves has the shortest wavelength?
Visible light
Radar
X-ray
Ultraviolet
X-ray
What type of current is supplied to the radiology department?
Alternating
Direct
Three phase
Pulsating Direct
Alternating
Which of the following is correct concerning a neutral atom?
Same number of protons and electrons
What type of radiation is produced after a Compton interaction?
Remnant
Characteristic
Bremsstrahlung
Primary
Characteristic
Why is an x-ray tube immersed in oil?
Insulation
Which of the following subatomic particles is the largest?
Electron
Neutron
Neutrino
Proton
Neutron
Which of the following describes the x-rays that are produced in the radiographic tube?
Secondary radiation
Primary radiation
Remnant radiation
Scattered radiation
Primary radiation
Which of the following refers to the number of electrons in the outer shell of an atom?
Valence number
Which of the following interactions does not occur in the diagnostic x-ray range?
Compton scattering
Photo effect
Unmodified scattering
Pair production
Pair production
Which of the following is smallest?
Actual focal spot
Effective focal spot
Target
Space charge
Actual focal spot
X-rays are very much the same as which of the following?
Gamma rays
Beta particles
String rays
Alpha particles
Gamma rays
Which of the following would cause an element to change to a completely different element?
Addition of a proton
What type of of current flows between the step up transformer and the rectification circuit?
Alternating
What type of primary radiation is produced when the x-ray tube voltage is below 70 kVp?
A. Characteristic
B. Bremsstrahlung
C. compton
D. Scatter
B. Bremsstrahlung
Which of the following will produce the least load on an x-ray tube?
High kVp, high mAs
Low kVp, high mAs
High kVp, low mAs
All will produce equal load
High kVp, low mAs
Which of the following can be used to determine a safe exposure?
Tube rating chart
Schematic chart
Anode cooling curve
Technique chart
Tube rating chart
Which of the following is not essential to the operation of automatic exposure controls?
Image intensifier
Electron emitting device
Back up timer
Capacitor
Image intensifier
Which of these is the negative terminal of an x-ray tube?
Cathode
Which of the following is a byproduct of the photoelectric effect?
Photoelectron
Who invented the first x-ray tube?
Crooke
Which of the following will not reduce the intensity of an x-ray beam?
Characteristic effect
Which of the following increases the penetrating power of the x-ray beam?
Kilovoltage
What type of bond holds atoms together by sharing their outer electrons?
Covalent bonds
Which of the following types of radiation cannot be produced at tube potentials less than 70 kVp?
Characteristic
What is the splitting of an atomic nucleus called
Fission
Which of the following describes a proton?
Mass and positive charge
Which of the following has the greatest effect on radiographic contrast?
Compton scattering
Unmodified scattering
Photoelectric effect
Pair production
Photoelectric effect
Why is an x-ray tube made of Pyrex glass?
Better withstand heat
Which of te following would best describe the wavelength of a diagnostic x-ray beam?
Monoenergetic
Monochromatic
Homogeneous
Heterogeneous
Heterogeneous
Which of the following would describe an x-ray photon?
High speed bundle of energy
Which of the following formulas is correct?
Wavelength = Speed x Frequency
Speed = Frequency x Wavelength
Speed = Wavelength / Frequency
Speed = Frequency / Wavelength
Speed = Frequency x Wavelength
Why is the x-ray tube made from lead impregnated glass and encased in a lead housing?
Absorb leakage radiation
When electrons strike the anode tube on an x-ray tube, how much of their energy is converted to x-rays?
less than 1%
Which of the following is placed in the circuit in case of current changes during the exposure?
Breaker switch
Which of the following causes pitting of the x-ray tube target?
Using both filaments at once
Moderate overloading of the tube
using the small focus all the time
Malfunction of high speed rotor
Moderate overloading of the tube
Which is an advantage of 3 phase equipment over single phase equipment?
Produces less exposure
Can achieve shorter exposure times
less expensive
easier to operate
Can achieve shorter exposure times
Which of the following is NOT an advantage of photo-timers?
Duplicates radiographic densities
Eliminates technique charts
More latitude in patient positioning
Eliminates the need to select mA
More latitude in patient positioning
Which type of radiation is produced when a high speed electron is slowed down or suddenly stopped?
Bremsstrahlung
Where is teh rectification circuit in an x-ray circuit?
Between the step down transformer and the tube
When will a space charge be present in the x-ray tube?
A. Never, it is outside of the tube
B. Whenever the rotor is engaged
C. Whenever the machine is turned on
D. There is always a space charge
Whenever the rotor is engaged
Which is not needed to produce x-rays?
Electrons stopped suddenly
Electrons set in high speed
Focusing cup
Availability of electrons
Focusing cup
When an increase in kilovoltage causes no increase in milliamperage, this is known as what?
Saturation current
Which of the following would not be found in an x-ray tube?
Rotor button