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Brightness gain is a product of ________.
minification gain and automatic brightness control
flux gain and automatic brightness control
minification gain and flux gain
automatic brightness control and milliamperage
Selected Answer: minification gain and flux gain
The Step Down Transformer:
1. Is also called the High Voltage Transformer
2. Is also called the Filament Transformer
3. Increase Voltage
4. Decreases Voltage
5. Has a turns ratio greater than one.
6. Has a turns ratio less than one.
7. Increases current
8. Decreases current
Selected Answer: 2,4,6,7
The most common type of tube support system used is the:
Ceiling mounted tube support system
Floor to ceiling tube support system
C-arm tube support system
Selected Answer: Ceiling mounted tube support system
The principle disadvantage of three phase equipment is __________.
C. Beam quality
Selected Answer:B. Cost
Electric current is always:
opposite of the direction the arrow of the diode on a schematic diagram
opposite of the electron flow
the same as the electron flow
Selected Answer: opposite of the electron flow
In modern x-ray tubes, the components for rectification are ______________.
A. Vacuum tubes
B. High frequency transformers
C. Valve tubes
D. Solide state semiconductors
Selected Answer:D. Solide state semiconductors
The three main divisions of the x-ray imaging system are the x-ray tube, _________, and ____________.
A. Operating console, high voltage generator
B. Protective housing, tabletop
C. Crane assembly, tabletop
D. Rectification circuit, operating console
Selected Answer:A. Operating console, high voltage generator
The high voltage generator section of the x-ray circuit contains the high voltage generator, the ______________, and the ____________.
A. Autotransformer, timer
B. kVp meter, filament transformer
C. Filament transformer, rectifiers
D. Timer, rectifie
Selected Answer:C. Filament transformer, rectifiers
In conventional fluoroscopy, in order to view the images on a television monitor, the light intensities are converted by a ____.
Charge-coupled device A and C
Selected Answer: A and C
The primary function of a fluoroscopic unit is to visualize _______________
static images as they occur
non contrasted blood vessels
dynamic images as they occur
Selected Answer: dynamic images as they occur
The most efficient type of transformer is the __________.
A. Optimus Prime
C. Closed core
Selected Answer:B. Shell-type
What type of material can be made magnetic, when placed in an external magnetic field?
Selected Answer:C. Ferromagnetic
What is the SI unit of magnetic field strength?
Selected Answer: Tesla
The force between magnetic poles is proportional to the _____________ of the magnetic pole strengths, and divided by (inversely proportional) the ___________ of the distance between them.
A. Square, product
B. Square, sum
C. Product, square
D. Sum, square
Selected Answer:C. Product, square
Electrification occurs through the movement of ___________.
Protons and electrons
Electrons and neutrons
Selected Answer: Electrons
Like magnetic poles __________, and unlike magnetic poles __________.
A. Repel, attract
B. Attract, repel
C. Repel, repel
D. Attract, attract
Selected Answer:A. Repel, attract
Tungsten is the choice material for x-ray anodes because of its:
A. High atomic number
B. High x-ray intensity
C. Low atomic number
D. Low rpm
Selected Answer:A. High atomic number
Define thermionic emission
A. The force that drives the electrons from the cathode to the anode
B. The force that discourages the freeing of electrons at the filament
C.The freeing of electrons from the outer shell of tungsten by the application of energy (heat)
D. The manipulation of the density of the beam by the application of a like charge
Selected Answer:C.The freeing of electrons from the outer shell of tungsten by the application of energy (heat)
Full wave, rectified three phase units provide an x-ray beam at ___________ per second.
A. 2 pulses
B. 120 pulses
C. 60 pulses
D. 1 pulse
Selected Answer:B. 120 pulses
On the surface of an electrified object, the charges concentrate ____________.
on the top side
on the underside
on the sharpest curvature
on the smoothest curvature
Selected Answer: on the sharpest curvature
A x-ray generator with the lowest power rating the _________ imaging system.Selected Answer:D. Single phaseAnswers:A. Three phase, six pulseB. Three phase, twelve pulseC. High frequencyD. Single phase