LRA 211 COMPREHENSIVE ASSESSMENT 2026 COMPLETE QUESTIONS AND ANSWERS

LRA 211 COMPREHENSIVE ASSESSMENT
2026 COMPLETE QUESTIONS AND
ANSWERS

◉ The negative end of the x-ray tube is the
Answer: cathode


◉ The anode includes the
Answer: target and induction motor


◉ The cathode includes the
Answer: Filaments and focusing cup


◉ The primary purpose of the glass or metal enclosure is to
Answer: Maintain the vacuum


◉ Glass enclosures are typically made of borosilicate glass (Pyrex)
because
Answer: It is very heat-resistant


◉ The area of the envelope where x-rays should exit the tube is the

, Answer: Window


◉ The target window is usually approximately
Answer: 5 cm^2


◉ The two types of anode designs are stationary and
Answer: rotating


◉ The stationary anode includes an area of tungsten embedded in
Answer: A copper rod


◉ The primary disadvantage to the stationary anode is that it
Answer: Heats up too quickly during x-ray production


◉ X-ray tubes with a stationary anode design may be found today
Answer: In medical areas that only need small x-ray exposures


◉ The rotating anode design uses a disc whose core is made of
Answer: Molybdenum


◉ One of the reasons that molybdenum is used in rotating anodes is
because it is