Đề 1

1. In what year were X-rays discovered.a. 1892b. 1895c. 1898d. 1901

2. In what year were some of the biologically damaging effects of X-ray discovered.a. 1892b. 1895c. 1898d. 1901

3. X-ray were discovered in experiments dealing with electricity and.a. Inonizationb. Magnetismc. Atomic structured. Vacuum tubes

4. X-ray were discovered when they caused a barium plantinocyande plate to.a. Fluoresceb. Phosphorescec. Vibrated. Burn and redden

5. X-radiation is part of the_____ spectrum.a. Radiationb. Energyc. Atomicd. Electromagnetic

6. X-ray have a dual nature, which means that they behave like botha. Atoms and moleculesb. Photons and quantac. Waves particlesd. Charged and unchanged particles

7. The wavelength and frequency of x-ray are______relateda. Directlyb. Inverselyc. Partiallyd. Not

8. X-ray have a(n)______electrical chargea. Positiveb. Negative c. Alternately positive and negatived. No charge

9. X-ray havea. No massb. The same mass as electronsc. The same mass as protonsd. The same mass as notrons

10. The X-ray beamused in diagnostic radiography can be described as beinga. Homogenousb. Mono energeticc. Poly energeticd. Scattered

Đề 21. Which X-ray tube component servers as source of electron for X-ray

productiona. Focusing cupb. Filamentc. Statord. Target

2. Electrons interact with the ______ to produce X-ray and heata. Focusing cupb. Filamentc. Statord. Target

3. The cloud of electrons that forms before X-ray production is referred to asa. Thermionic emissionb. Space chargec. Space charge effectd. Tube current

4. The burning off of electrons at the cathode is referred to asa. Thermionic emissionb. Space chargec. Space charge effectd. Tube current

5. Which primary exposure factor influences both the quantily and the quantily of X-ray photonsa. mAb. mAsc. kVpd. exposure time

6. the unit used to express tube current isa. mAb. mAsc. kVpd. s

7. What percentage of the kinetic energy is converted to heat when moving electrons strike the anode targeta. 1%b. 25%c. 59%d. 99%

8. The intensity of the X-ray beam is greater on thea. Cathode side of the tubeb. Anode side of the tubec. Short axis of the beamd. Long axis of the beam

9. According to the line focus principle, as the target angle decreases, thea. Actual focal spot size decreasesb. Actual focal spot size increasesc. Effective focal spot size decreasesd. Effective focal spot size increases

10. _______will extend X-ray tube lifea. Selecting higher tube currentsb. Using the small focal spot when possiblec. Producing exposures with a wide range of kVp valuesd. Warning up the tube after 2 hours of nonuse