ARRT LMRT EXAM COMPLETE ANSWERS 2026/2027

ARRT LMRT EXAM
COMPLETE ANSWERS ( 2026/2027 )
1. Most X-ray tubes in use today have high speed rotation at: 10,000 rpm
2. The is used to rotate the anode: Electromagnetic induction motor
3. The process of changing Alternating Current (AC) into Direct Current(DC): Rectification
4. Above 70 kVp, about 15% of the beam is?: Characteristic
5. The German word that means braking and slowing?: Bremsstrahlung
6. Every x-ray exposure will contain photons produced from bremsstrahlunginteractions
Below 70 kVp, about what percentage is the beam is brems?:
7. Every x-ray exposure will contain photons produced from bremsstrahlunginteractions
Above 70 kVp, about what percentage is the beam is brems?: 85%
8. For Characteristic radiation to be created Above 70 kVp, about what per-centage of the
beam is characteristic?: 15%
9. Created when an incoming electron interacts with the k-shell electron andknocks it out of
its orbit. When the electron void is filled with an outer shell electron an x-ray photon is
created
this is?: Characteristic radiation
10. What is unsharpness? (Geometric blur or focal spot blur): Penumbra
11. Chicago 1920 worlds largest and oldest professional radiation organiza-tion: ASRT
12. formed in 1922 establish standards and examinations: ARRT
13. Formed in 1969 national organization that conducts accreditation:JRCERT
14. The radiation that leaves the tube is?: Primary radiation
15. The x-ray beam that exits on the opposite side of the patient is called?: -
Remnant radiation or exit radiation
16. A "unseen image" is called?: Latent image
17. The absorption of an x-ray beam is called?
(the patient is the primary source of scatter): Attenuation