ARRT PRACTICE EXAM
COMPLETE ANSWERS 100% CORRECT (LATEST 2024 / 2025 )
1. Effective dose may be found in what published material?: NCRP reports
2. The smallest particle of an element that retains the characteristics of theelement is an?:
atom
3. Atomic mass =: number of protons = number of neutrons
4. Electronic timers used in xray equipment allow for exposure times of?: -
1/1000 seconds
5. To ensure consistency of radiographic quality from one exposure to thenext, what device
may be used?: AEC
6. Devicesin the x-ray circuit that operate on the principle of mutual inductionare called?:
Transformers
7. The high voltage section of the x-ray circuit makes use of what type oftransformer?: Stepup
8. Xray tube NEEDS what type of current?: DC direct current rectifier changesAC to DC
9. The result of thermionic emission is?: Electron cloud
10. Focusing cup is located at the?: Cathode
11. Outer shell filling holes in the K-shell is?: Characteristic K-shell holds 2elections
12. Digital fluro should be viewed on?: High resolution monitor
13. A primary advantage of digital fluro is?: Post processing and manipulation ofthe image
14. Algorithm is?: A mathematical formula used to reconstruct the image in digitalimaging.
15. In CR each pixel corresponds to a shade of gray representing an area inthe patient known
as a?: voxel
16. Lightness and darkness maybe be adjusted by?: AdjustingWINDOW LEVEL(brightness)
Window width (contrast or gray level)
17. The window level in CR is the?: Midpoint of densities
18. The amount of receptor exposure is controlled PRIMARILY by?: mAs
19. The visible image may also be called the?: Manifest image
20. The rule or law that governs changing technique using kVp is the?: 15%rule