TCDHA RADIOGRAPHY THEORY COMPREHENSIVE TEST BANK PRACTICE QUESTIONS AND RATIONALES

TCDHA RADIOGRAPHY THEORY
COMPREHENSIVE TEST BANK PRACTICE
QUESTIONS AND RATIONALES

●● Classifications of ionizing radiation
Answer: electromagnetic, particulate


●● electromagnetic radiation
Answer: man made or occurs naturally, possesses no mass


●● Particulate radiation
Answer: tiny particles of matter that possess mass and travel in straight
lines and at high speeds


●● Tube head is immersed in
Answer: oil, to provide electrical insulation and dispense of heat


●● Cathode
Answer: negative charge terminal made of tungsten


●● anode
Answer: postive charge terminal made of copper

,●● Cones
Answer: 8 or 16 inches


●● Collimator
Answer: Lead disk to restrict the size of the beam


●● High mA produces
Answer: lighter image


●● Low kVp produces
Answer: High contrast


●● transformers
Answer: A device that increases or decreases the voltage of an electrical
current


●● Compton scattering
Answer: 62 percent


●● Roentgen does not have a _____________
Answer: SI equivalent

, ●● Paralelling technique advantages
Answer: accurate, simple, standardized


●● paralelling technique disadvantages
Answer: film placement, discomfort


●● increased target receptor distance
Answer: avoids magnification


●● central ray is _____degrees to receptor
Answer: 90


●● if the lack of parallelism is _______ the image is acceptable
Answer: less than 20


●● central ray is _______degrees to tooth surface
Answer: +10


●● Radiolucent
Answer: appears dark