5862089
Descripción
Test por Zachariah Atteberry, actualizado hace más de 1 año
|
Creado por Zachariah Atteberry
hace más de 8 años
|
|
Pregunta 1
Pregunta
The distance between two consecutive corresponding points on a wave is?
Respuesta
-
Frequency
-
Cycles
-
Wave
-
Wavelength
Pregunta 2
Pregunta
X-rays are?
Respuesta
-
Visible with ultraviolet light
-
Visible while in the dark room
-
Only visible when it is being shot
-
They are like JOHN CENA and you cant see them
Pregunta 3
Pregunta
The higher that the frequency of x-ray waves are...
Respuesta
-
The higher the penetration
-
The lower the penetration
Pregunta 4
Pregunta
Wave length is?
Respuesta
-
Variable
-
Does not change since it goes in only a straight line
Pregunta 5
Pregunta
X-ray penetration depends on atomic number, x-ray energy, and density
Respuesta
- True
- False
Pregunta 6
Pregunta
Waves that are longer have___?
Respuesta
-
Lower frequency
-
Higher frequency
Pregunta 7
Pregunta
The lower the frequency the _____ the penetration power
Respuesta
-
Lower
-
Higher
Pregunta 8
Pregunta
The cathode is?
Respuesta
-
Negative
-
Positive
Pregunta 9
Pregunta
The anode is?
Respuesta
-
Positive
-
Negative
Pregunta 10
Pregunta
Which consists of the wire filament and focusing cup?
Respuesta
-
Anode
-
Cathode
Pregunta 11
Pregunta
X-rays are?
Respuesta
-
90% heat and 9% X-rays
-
99% heat and 1% X-rays
-
1% heat and 99% X-rays
-
50% heat and 50% X-rays
Pregunta 12
Pregunta
What provides and houses the vacuum environment?
Respuesta
-
Anode
-
Cathode
-
Glass envelope
-
Focusing cup
-
Wire filament
-
Aluminum filter
Pregunta 13
Pregunta
Produces electrons when heated
Respuesta
-
Anode
-
Cathode
-
Wire filament
-
Focusing cup
Pregunta 14
Pregunta
What is the wire filament made of and why?
Respuesta
-
Tungsten; high atomic number and high melting point
-
Molybdenum; low atomic number and high melting point
-
Copper; high atomic number and low melting point necessary for electron production
-
Aluminum; high atomic number, high melting point
Pregunta 15
Pregunta
mA is?
Respuesta
-
How many electrons
-
Speed of the electrons
Pregunta 16
Pregunta
kVp is?
Respuesta
-
Speed of electrons
-
How many electrons
Pregunta 17
Pregunta
The higher that an atomic number is....
Respuesta
-
The more dense it is
-
The less dense it is
Pregunta 18
Pregunta
If x-ray beams went all the way to the film..
Respuesta
-
You would see black
-
You would see white
Pregunta 19
Pregunta
If you see white on the finished radiograph, this tells you?
Respuesta
-
The x-ray beams were absorbed
-
The x-rays beams penetrated and reached the film
Pregunta 20
Pregunta
What is the wire filament heated by?
Respuesta
-
Low energy circuit
-
High energy circuit
Pregunta 21
Pregunta
X-rays beams can cause cataracts in humans
Respuesta
- True
- False
Pregunta 22
Pregunta
Objects that fluoresce or emit light after an x-ray has been shot indicates that the x -ray machine wire filament is faulty
Respuesta
- True
- False
Pregunta 23
Pregunta
The focusing cup is made of what material and why?
Respuesta
-
Molybdenum; high melting point and poor conductor of heat
-
Tungsten; high melting point and great conductor of heat
Pregunta 24
Pregunta
The target of the anode is made of what material and why?
Respuesta
-
Tungsten; dissipates heat
-
Molybdenum; high melting point
Pregunta 25
Pregunta
What would tell you that heat damage have occurred in a dental anode?
Respuesta
-
Cathode will not make a cloud of electrons
-
Finished radiograph is too light
-
There will be no radiograph made
-
You will hear a loud machinery noise inside of the anode side
Pregunta 26
Pregunta
The heel effect is more prominent in?
Respuesta
-
Rotating anodes
-
Stationary anodes
Pregunta 27
Pregunta
What is the heel effect?
Respuesta
-
causes increased absorption of x-ray photons by target before can reach patient due to decreased intensity at anode side
-
causes increased absorption of x-ray electrons by the cathode
-
Results in crazing which is when glass pieces fall and can "arch" the current
-
Results in decreased absorption of quanta at the target before can reach patient and image receptor due to increased intensity on cathode side
Pregunta 28
Pregunta
The most common focal spot in a veterinary machine is?
Respuesta
-
2mm squared
-
3mm squared
-
7-8mm squared
-
10mm squared
Pregunta 29
Pregunta
In regards to x-ray, pneumbra is?
Respuesta
-
1996 band formed in France and wrote the song "Tragical Memories"
-
Lighter than normal x-ray phenomon
-
Larger focal spots that form halo effect on finished radiograph
-
Darker than normal x-ray phenomon
Pregunta 30
Pregunta
During the heel effect, there is?
Respuesta
-
Decreased intensity at anode side
-
Decrease intensity at cathode side
-
Increased intensity at cathode side
-
Increased intensity at anode side
Pregunta 31
Pregunta
In most situations, larger focal spots produce images with?
Respuesta
-
Greater detail
-
Reduction of detail
Pregunta 32
Pregunta
The ____ the anode, the more severe that the heel effect becomes
Respuesta
-
faster
-
slower
-
larger
-
steeper
Pregunta 33
Pregunta
Which would have the larger focal spot to dissipate heat?
Respuesta
-
Rotating anode
-
Stationary anodes
Pregunta 34
Pregunta
Is a tightly focused x-ray beam that exits the tube window
Respuesta
-
Effective focal spot
-
Focal spot
-
Line focus principle
-
Anode beam
-
Focusing cup
Pregunta 35
Pregunta
Which is larger?
Respuesta
-
Actual focal spot
-
Effective focal spot
Pregunta 36
Pregunta
In an x-ray, the dog's head is usually towards the?
Respuesta
-
Cathode
-
Anode
Pregunta 37
Pregunta
Outer edges of focal spot become so hot that the size of the focal spot is enlarged, a phenomenon referred to as?
Respuesta
-
Line focus principle
-
Focal spot bloom
-
Effective focal spot
-
Heel effect
Pregunta 38
Pregunta
Net result of focal spot bloom is?
Respuesta
-
Increase in quality
-
Loss in sharpness
-
Loss in sharpness and definition
-
increase in sharpness
Pregunta 39
Pregunta
Most tube failures happen because of?
Respuesta
-
Cathode failure
-
Anode failure
-
Filament failure
-
Focusing cup failure
Pregunta 40
Pregunta
The x-ray does not have to cool between x-rays
Respuesta
- True
- False
Pregunta 41
Pregunta
Which is not true of the standby current?
Respuesta
-
Prolongs life of the tube
-
Produces an electron cloud prior to an actual x-ray (good for inhalation and exhalation)
-
Preheats filament to a low temperature when X-ray machine is turned on
Pregunta 42
Pregunta
You are going to take an x-ray of the abdomen with the use of the preexposure button. You are waiting until?
Respuesta
-
Expiration
-
Inspiration
Pregunta 43
Pregunta
You are going to take an x-ray of the thorax with the use of the preexposure button. You are waiting until?
Respuesta
-
Expiration
-
Inspiration
Pregunta 44
Pregunta
If the film is transparent or light after processing, there is most likely an issue with the?
Respuesta
-
Anode
-
Cathode
-
Filament
-
Preexposure button
Pregunta 45
Pregunta
Firm blackness that is not uniform could be due to?
Respuesta
-
Anode target failure
-
Anode bearings failure
-
Glass envelop damage
-
Filament failure
-
Cathode failure
Pregunta 46
Pregunta
Which is most likely to fail with the use of preexposure button over an extended period of time?
Respuesta
-
Anode bearings
-
Anode target
-
Cathode
-
Glass envelope
-
Filament
Pregunta 47
Pregunta
The mAs meter on the machine is stuck. You suspect?
Respuesta
-
Filament failure
-
Anode target failure
-
Cathode failure
-
Preexposure button failure
-
Anode bearings failure
Pregunta 48
Pregunta
You should use ___ mAs techniques when possible
Respuesta
-
high
-
low
Pregunta 49
Pregunta
What may cause arcing?
Respuesta
-
Glass envelop damage
-
Cathode failure
-
Anode failure
-
Effective focal spot bloom
Pregunta 50
Pregunta
Provides the electrical potential to drive the electron cloud in stream from cathode to anode
Respuesta
-
high voltage circuit
-
Low voltage circuit
Pregunta 51
Pregunta
Provides electricity to heat the filament
Respuesta
-
High voltage circuit
-
Low voltage circuit
Pregunta 52
Pregunta
Reduces voltage of incoming line to about 10 volts
Respuesta
-
Autotransformer
-
Step-up transformer
-
Step-down transformer
-
Biotransformer
Pregunta 53
Pregunta
In general, what part of the x-ray dissipates heat for the entire machine?
Respuesta
-
Oil
-
Glass envelope
-
Anode
-
Focusing cup
-
Filament
Pregunta 54
Pregunta
Controls amount of kVP across the x-ray tube
Respuesta
-
Autotransformer
-
Step-up transformer
-
Step-down transformer
-
Biotransformer
Pregunta 55
Pregunta
Which circuit is connected to the mA control on the console
Respuesta
-
Low voltage circuit
-
High voltage circuit
-
Autotransformer
-
Step-up transformer
Pregunta 56
Pregunta
You want to keep exposure times of 1/30 second or longer
Respuesta
- True
- False
Pregunta 57
Pregunta
Which is used for portable units
Respuesta
-
Half wave rectification
-
Full wave rectification
Pregunta 58
Pregunta
If you want to decrease potential of x-ray exposure to the technician, use a timer switch
Respuesta
- True
- False
Pregunta 59
Pregunta
Which only uses the positive part of the electrical current in regards to half way rectification?
Respuesta
-
Dental units
-
Stationary units
Pregunta 60
Pregunta
Why are rectifiers used?
Respuesta
-
When anode gets too hot, electrons can flow back to filament and damage it
-
When cathode gets too hot, electrons can cause damage to the glass envelope
-
"crazing" and "arcing" can both occur
-
X-rays that are constantly used can result in anode bearing damage which results in lighter x-rays
Pregunta 61
Pregunta
What does a colimator do?
Respuesta
-
Controls size of x-ray
-
Controls heat of x-ray
-
Controls strength of x-ray
-
Helps prevent focal spot blooming
Pregunta 62
Pregunta
Scatter radiation is a negative result of an uncontrolled beam that can result in?
Respuesta
-
Cathode damage and failure
-
Anode bearing failure
-
Oil leakage and overheating
-
Fogs the film
Pregunta 63
Pregunta
Coning down prevents?
Respuesta
-
Damage to the cathode
-
Damage to personnel
-
Damage to the filament
-
Overheating
Pregunta 64
Pregunta
You are working in California and the X-ray machine you are using has an output of 75 kVp. The state law in California says that you are required to have which of the following on your x-ray machine?
Respuesta
-
2.5mm aluminum filter
-
Collimator (AKA: Coning down)
-
Focusing cup
-
Filament
Pregunta 65
Pregunta
What is the #1 cause of artifacts on a radiograph?
Respuesta
-
Motion
-
Filament failure
-
Cathode failure
-
Glass window cracking (crazing and arcing)
Pregunta 66
Pregunta
What does the control panel not include?
Respuesta
-
Warning light
-
kVp and mA selector
-
voltage compensator
-
Exposure button
-
Timer
-
Emergency turn off switch
Pregunta 67
Pregunta
Which is not a factor of X-ray tube rating?
Respuesta
-
Focal spot size
-
Target angle
-
Anode speed
-
Electrical current
-
Alloy composition
Pregunta 68
Pregunta
What do X-ray tube ratings determine?
Respuesta
-
kVP
-
mA
-
How long can be used without overloading the tube
-
All of the above
Pregunta 69
Pregunta
What adjusts the transformer if needed when electrical output from incoming line is inconsistent?
Respuesta
-
Rectification
-
Voltage compensator
-
Aluminum filter
-
Colimator
Pregunta 70
Pregunta
A three phase generator is more powerful than a single phase generator because there is an almost always constant current between anode and cathode since it superimposes three single phase currents out of phase with each other
Respuesta
- True
- False
Pregunta 71
Pregunta
The mA cannot be controlled when air molecules interfere with the electron flow following glass envelope damage because there is less x-rays produced at the target area
Respuesta
- True
- False
Pregunta 72
Pregunta
The negatively charged particle of an atom is?
Respuesta
-
Electron
-
Proton
Pregunta 73
Pregunta
A radiograph is synonymous with an x-ray
Respuesta
-
True
-
False
Pregunta 74
Pregunta
Frequency is measured how?
Respuesta
-
Cycles of the wave that pass stationary point per second
-
Cycles of the wave that pass stationary point per minute
-
Cycles of the wave that pass stationary point per hour
Pregunta 75
Pregunta
Atoms consist of?
Respuesta
-
Particles
-
Electrons
-
Neutrons
-
All of the above
Pregunta 76
Pregunta
X-ray machine rays can bend and turn corners as needed which is why safety glasses are required
Respuesta
- True
- False
Pregunta 77
Pregunta
The actual beam from a machine is called?
Respuesta
-
X-ray
-
Radiograph
Pregunta 78
Pregunta
X-rays can excite or ionize atoms which can be a source of tumors and tissue damage if precautions are not taken
Respuesta
- True
- False
Pregunta 79
Pregunta
The guy that discovered x-rays and documented them in 1895 is: [blank_start]Wilhelm Conrad Roentgen[blank_end]
Respuesta
-
Wilhelm Conrad Roentgen
Pregunta 80
Pregunta
Which of the following do we need to produce an x-ray
Respuesta
-
Source of electrons
-
Way to accelerate electrons from one side of the tube to the other
-
Vacuum environment to remove air molecules and prevent oxidation
-
Target for electrons to collide with and interact with to produce x-rays
-
All of the above
Pregunta 81
Pregunta
A mammography machine is likely to be made of?
Respuesta
-
Tungsten
-
Molybdenum
Pregunta 82
Pregunta
Why is the base of the anode copper?
Respuesta
-
Draws heat away from target
-
Used to help make electrons and shoot them forward
-
Prevent scatter radiation as a result of stray electrons on their way from the cathode side
-
All of the above are true
Pregunta 83
Pregunta
Which of the following anodes will rotate on its axis through the center of the tube
Respuesta
-
Stationary anode
-
Portable anode
-
Dental anode
-
Disk shaped anode
-
Portable units and dental units both rotate on their axis
Pregunta 84
Respuesta
-
Cathode
-
Anode
Pregunta 85
Respuesta
-
Cathode
-
Anode
Pregunta 86
Respuesta
-
Oil
-
Glass envelope
-
Window
-
Filter
Pregunta 87
Respuesta
-
Filament
-
Focusing cup
-
Window
-
Filter
-
Both Filament and focusing cup
Pregunta 88
Respuesta
-
Target
-
Cathode filament and focusing cup
-
Glass envelope
-
Window
-
Filter
Pregunta 89
Pregunta
Radiation is emitted from the target area in a ___ shape with the heel effect
Respuesta
-
Conical
-
Square
Pregunta 90
Pregunta
Which is the most limited in mA and has limited use on large body parts?
Respuesta
-
Portable anodes
-
Disk shaped anodes
Pregunta 91
Pregunta
How do you get mAs?
Respuesta
-
mA x time
-
mA x kVp
-
mA x time divided by kVp
Pregunta 92
Pregunta
Waves from high frequency generators are usually?
Respuesta
-
Square
-
Circular
-
Conical
Pregunta 93
Pregunta
Watery with lots of air require?
Respuesta
-
Higher mA
-
Lower mA
Pregunta 94
Pregunta
Which is a normal mA setting?
Respuesta
-
100
-
44
Pregunta 95
Pregunta
Which is a normal Kvp setting?
Respuesta
-
46
-
200
Pregunta 96
Pregunta
The primary purpose of the x-ray tube is to stop stray radiation AND prevent damage to internal components
Respuesta
- True
- False
Pregunta 97
Pregunta
Do shorter or longer wave lengths have better penetration?
Respuesta
-
Shorter
-
Longer
Pregunta 98
Pregunta
Bundles of energy that are carried by the wave in an x-ray beam are called?
Respuesta
-
Photons
-
Quanta
-
Neutrons
-
Both Quanta and Photons
Pregunta 99
Pregunta
Specific target angle that produces effective focal spot that will be square and much smaller than the actual focal spot
Respuesta
-
Heel effect
-
Line focus principle
-
Focal spot zoom
-
Focal spot bloom
Pregunta 100
Pregunta
Which produces more heat?
Respuesta
-
500 mA
-
300 mA
Pregunta 101
Pregunta
The kilovoltage applied between the anode and cathode will later translate into penetrating power
Respuesta
- True
- False
Pregunta 102
Pregunta
If anode bearings fail completely in a machine, you will hear a loud noise almost like a machinery noise from the anode side when attempting to use the exposure or pre-exposure button
Respuesta
- True
- False
Pregunta 103
Pregunta
Aluminum filters help to?
Respuesta
-
Remove low energy photons
-
Remove high energy photons
-
Remove high energy electrons
-
Remove low energy electrons
Pregunta 104
Pregunta
If the warning light turns on during the x-ray exposure, this indicates an issue with the machine and requires immediate technical support
Respuesta
- True
- False
Pregunta 105
Pregunta
Which has more filaments
Respuesta
-
Portable machines
-
Floor models
Pregunta 106
Pregunta
The heel effect is the result of?
Respuesta
-
X-ray emission that is nearly parallel to the target itself
-
X-ray emission that is nowhere near the target but is actually arced away
-
X-ray emission that is nearly perpendicular to the target itself
Pregunta 107
Pregunta
What kind of anode would you choose to decrease the heel effect?
Respuesta
-
25 degrees angled anode
-
15 degrees angled anode
-
18 degrees angled anode
Pregunta 108
Pregunta
To withstand heat from electron bombardment, focal spot has to be larger than what is perfect for great detail so you find a medium between detail and size
Respuesta
- True
- False
Pregunta 109
Pregunta
IS the rotating anode, the filament is angled to direct electrons toward the beveled target area of the rotating disk to distribute heat
Respuesta
- True
- False
Pregunta 110
Pregunta
In stationary anodes, the face of the target is angled toward the window and cannot withstand high heats
Respuesta
-
true
-
false
Pregunta 111
Pregunta
Which will better absorb photons
Respuesta
-
More dense
-
Less dense
Pregunta 112
Pregunta
Rotating anodes can have smaller focal spots than stationary anodes
Respuesta
- True
- False
Pregunta 113
Pregunta
Anode bearing failure is most often seen in?
Respuesta
-
Rotating anodes
-
Stationary anodes
Pregunta 114
Pregunta
The majority of tube failure is user error
Respuesta
- True
- False
Pregunta 115
Pregunta
Rectifiers are placed in series in high voltage part of circuit to prevent conduction during negative phase
Respuesta
-
true
-
false
Pregunta 116
Pregunta
High-frequency generators often have hills and valleys
Respuesta
- True
- False
Pregunta 117
Pregunta
Full wave rectification current pulses 120 times/second and is twice the x-ray production and decreased exposure times
Respuesta
- True
- False
Pregunta 118
Pregunta
Which does not use tungsten?
Respuesta
-
Wire filament
-
Focusing cup
-
Anode
-
Target
Pregunta 119
Pregunta
The spindle which dissipates heat for the rotating anode is made up?
Respuesta
-
Tungsten
-
Molybdenum
Pregunta 120
Pregunta
Which is a poor conductor of heat?
Respuesta
-
Molybdenum
-
Tungsten
Pregunta 121
Pregunta
Which is better at dissipating heat?
Respuesta
-
Tungsten
-
Molybdenum
Pregunta 122
Pregunta
If the anode bearings are just starting to go bad, you will hear a machinery like noise and target will overheat
Respuesta
- True
- False
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