X-Ray Physics Final Exam Questions and 100% Correct Answers

b. 1895 - In what year were x-rays discovered? a. 1892 b. 1895 c. 1898 d. 1901 c. 1898 - In what year were some of the biologically damaging effects of x-rays discovered? a. 1892 b. 1895 c. 1898 d. 1901 d. Vacuum Tubes - X-rays were discovered in experiments dealing with electricity and ______. a. Ionization b. Magnetism c. Atomic structure d. Vacuum Tubes a. Fluoresce - X-rays were discovered when they caused a barium platinocyanide-coated plate to __________. a. Fluoresce b. Phosphoresce c. Vibrate d. Burn and redden d. Electromagnetic - X-radiation is part of which spectrum? a. Radiation b. Energy c. Atomic d. Electromagnetic c. Waves and particles - X-rays have a dual nature, which means that they behave like both _____. a. Atoms and molecules b. Photons and quanta c. Waves and particles d. Charged and uncharged particles b. Inversely - The wavelength and frequency of x-rays are __________ related. a. Directly b. Inversely c. Partially d. Not d. No - X-rays have __________ electrical charge. a. A positive b. A negative c. An alternately positive and negative d. No a. No mass - X-rays have __________. a. No mass b. The same mass as electrons c. The same mass as protons d. The same mass as neutrons c. Polyenergetic - The x-ray beam used in diagnostic radiography can be described as being _________. a. Homogeneous b. Monoenergetic c. Polyenergetic d. Scattered b. Filament - Which x-ray tube component serves as a source of electrons for x-ray production? a. Focusing cup b. Filament c. Stator d. Target d. Target - Electrons interact with the _______ to produce x-rays and heat. a. Focusing cup b. Filament c. Stator d. Target b. Space charge - The cloud of electrons that forms before x-ray production is referred to as ________. a. Thermionic emission b. Space charge c. Space charge effect d. Tube current a. Thermionic emission - The burning or boiling off of electrons at the cathode is referred to as _____. a. Thermionic emission b. Space charge c. Space charge effect d. Tube current c. kVp - Which primary exposure factor influences both the quantity and the quality of x-ray photons? a. mA b. mAs c. kVp d. Exposure time a. mA - The unit used to express tube current is _______. a. mA b. mAs c. kVp d. s d. 99% - What percentage of the kinetic energy is converted to heat when moving electrons strike the anode target? a. 1% b. 25% c. 59% d. 99% a. Cathode side of the tube - The intensity of the x-ray beam is greater on the ______. a. Cathode side of the tube b. Anode side of the tube c. Short axis of the beam d. Long axis of the beam c. Effective focal spot size decreases - According to the line focus principle, as the target angle decreases, the ____. a. Actual focal spot size decreases b. Actual focal spot size increases c. Effective focal spot size decreases d. Effective focal spot size increases d. Warming up the tube after 2 hours of nonuse - _________ extends x-ray tube life. a. Selecting higher tube currents b. Using small focal spots when possible c. Producing exposures with a wide range of kVp values d. Warming up the tube after 2 hours of nonuse c. Bremsstrahlung interaction - Which type of target interaction is responsible for most of the x-rays in the diagnostic beam? a. Characteristic interaction b. Thermionic emission c. Bremsstrahlung interaction d. None of the above b. 30 mAs - How much mAs is produced when the radiographer sets 70 kVp, 600 mA, and 50 ms? a. 3.5 mAs b. 30 mAs c. 300 mAs d. 350 mAs d. a and c - Increasing the kVp results in _______. a. X-rays with higher energy b. X-rays with lower energy c. More x-rays d. a and c e. b and c d. b and c - Total filtration in the x-ray beam includes _______. a. Compensating filters b. Inherent filtration c. Added filtration d. b and c e. All of the above