LRA 222 FINAL EXAM WITH CORRECT 120+
QUESTIONS WITH CORRECTRY ANALYZED
ANSWERS (ACTUAL EXAM) ALREADY
GRADED A+ LATEST 2024 – 2025
With half wave rectification the current flow through the x-ray tube during
the______ part of this cycle - ANSWERS-Positive
The _______ circuit provides electrons for the x-ray tube current - ANSWERS-
filament
The three main parts of the x-ray imaging system are the x-ray
tube,_____,and______ - ANSWERS-Operating consul, high voltage generator
The first component to receive power in the x-ray circuit is - ANSWERS-
autotransformer
,The difference in the wave form between the primary and secondary sides of the
high voltage transformer is the - ANSWERS-Amplitude
The most widely used support structure for the x-ray tube is the - ANSWERS-
ceiling support system
Because of the line focus principal, the effective focal spot size decreases with
decreasing _____. - ANSWERS-target angle
The filament is made of - ANSWERS-Tungsten
A single-phase waveform has _____ ripple. - ANSWERS-100%
The cathode side of the tube should be directed toward the _____ part of the
patient. - ANSWERS-thicker
Voltage across the x-ray tube is most constant with - ANSWERS-high frequency
generators
The step-up transformer increases voltage _____ times. - ANSWERS-500-1000
times
The _____is the source of radiation in the x-ray tube - ANSWERS-Focal spot
,What is the most common cause of tube failure? - ANSWERS-Tungsten
vaporization
In modern imaging systems, the components for rectification are - ANSWERS-solid
state semiconductors
The filament in an x-ray tube is about _____ cm in length. - ANSWERS-1-2 cm
Each tube has its own rating tube chart to show - ANSWERS-Maximum exposure
time
As an x-ray tube ages, the inside can become coated with tungsten, which can
cause _____ in the tube. - ANSWERS-arcing
The mAs timer is usually set to give the ____ mA at the ________ time -
ANSWERS-highest, shortest
The target of the rotating an anode is usually coated with a ____ alloy -
ANSWERS-Tungsten
The heel effect is caused by the - ANSWERS-anode angle
, The automatic exposure control terminates the exposure when - ANSWERS-
sufficient radiation reaches the image receptor
The negative side of the x-ray tube holds the - ANSWERS-filament
The effective focal spot size is _____ the actual focal spot size. - ANSWERS-smaller
than
Full wave rectified, three phase units provide an x-ray beam at _______ pulses
per second - ANSWERS-360
A diode allows electrons to flow from - ANSWERS-cathode to anode
A step-down transformer is located in the _____ circuit. - ANSWERS-filament
The_______ are outside the glass envelope - ANSWERS-Stators
The x-ray beam generated by the circuit with the______ voltage ripple has
the____ quantity and quality - ANSWERS-Lowest, highest
Most mammography units operate with _____ generators. - ANSWERS-high
frequency
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