Lra 222 Final Exam Questions and Answers

Lra 222 Final Exam Questions and Answers What is the most accurate type of timer? - Answer-electronic When does the AEC terminate the exposure ? - Answer-When exposure is met Which x-ray generator has the lowest power rating? - Answer-Single-phase How many windings does the auto transformer have? - Answer-1 Should the thickest part or the thinnest part be placed under cathode? - Answer-Thickest Are long or short exposure times more likely to cause to failure - Answer-Long Localized, potting, or cracking on the anode can be caused by what? - Answer-A single excessive exposure What causes the anode heal effect? - Answer-Xray absorption within the anode True or False? As an x-ray to gets older, the inside may become coded with tungstun, and which can cause arcing in the tube. - Answer-True Are the stators on the inside or the outside of the glass envelope? - Answer-Outside The ___ is the source of radiation in the xray tube - Answer-focal spot What does the tube rating show? - Answer-Longest exposure time of xray tube can be energized without overheating What creates space charge? - Answer-The heating of the filament which boils off electrons What is the target of the rotating and usually coated with? - Answer-Tungsten What is the most common cause for tube failure? - Answer-tungsten vaporization High capacity tube rotors revolve at _____ rpm. - Answer-10,000 How many filaments does a dual focus tube have? - Answer-2