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Exam (elaborations)

LRA 222 FINAL EXAM QUESTIONS AND ANSWERS

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LRA 222 FINAL EXAM QUESTIONS AND ANSWERS...

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  • October 26, 2024
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  • 2024/2025
  • Exam (elaborations)
  • Questions & answers
  • lra 222
  • lra 222 final
  • LRA 222
  • LRA 222
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LRA 222 FINAL EXAM QUESTIONS AND ANSWERS


First component in the x-ray circuit is the ________. Answer autotransformer



A step-down transformer is located in the ________. Answer filament circuit



Voltage across the x-ray tube is the most constant with ________. Answer high frequency
generators



Filament circuit provides electrons for the ________. Answer x-ray tube current



The operating console contains circuits that are ________. Answer low voltage only



A single-wave rectification ________. Answer has 100% ripple



Half-wave rectification current flows through the x-ray tube during the _____ part of the
cycle. - Answer positive part of cycle

Full wave rectification three phase units provide an x-ray beam at - Answer 360 pulses
per second

three main parts of the x-ray imaging system - Answer x-ray tube, operating console,
high voltage generator

step up transformer increases voltage - Answer 500-1000 times



X-ray beam generated by the circuit with the lowest voltage ripple has the highest
quantity and quality Answer



The medical imaging industry standard for calculating high voltage generator power is
to use the Answer maximum tube current at 100 kVp and 100ms

, Mammography units operate with the Answer high frequency generators



The major disadvantage of three-phase equipment is Answer cost



The high voltage generator contains______ high voltage transformer, filament
transformer and rectifiers



Thermionic emission at the filament determines______ milliamperage across the x-ray
tube during an exposure



A diode allows electrons to flow from______ Cathode to anode



The mAs timer is usually set to give the______ highest mA at the shortest amount of time



the change in waveform from the primary to secondary side of the high voltage
transformer is - Answer amplitude



Differences in power supply sent to the x-ray machine is equalized by the - Answer line
voltage compensator



The timer of maximum accuracy is the - Answer electronic timer



The rectification components in most contemporary imaging systems are _____. -
Answer solid state state semiconductors



the automatic exposure control (AEC) - Answer stops the exposure when enough
radiation has reached the image receptor

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