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ARRT RADIOLOGY EQUIPMENT & MAINTENANCE EXAM QUESTIONS AND CORRECT ANSWERS | A+ GRADE
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ARRT RADIOLOGY EQUIPMENT & MAINTENANCE EXAM QUESTIONS AND CORRECT ANSWERS | A+ GRADE
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ARRT RADIOLOGY EQUIPMENT &MAINTENANCE EXAM QUESTIONS AND
CORRECT ANSWERS | A+ GRADE
A technique chart should be prepared for each AEC x-ray
unit and should contain the following information for each
type of examination:
1. Photocell(s) used
2. Optimum kVp
3. Backup time
(A) 1 only
(B) 1 and 2 only
(C) 2 and 3 only
(D) 1, 2, and 3 Correct Answer (D) 1, 2, and 3
Which of the following is (are) characteristics of the x-ray
tube?
1. The target material should have a high atomic number
and a high melting point.
2. The useful beam emerges from the port window.
3. The cathode assembly receives both low and high
voltages.
(A) 1 only
(B) 2 only
(C) 1 and 2 only
(D) 1, 2, and 3 Correct Answer (D) 1, 2, and 3
,Which of the following circuit devices must be connected
in parallel?
(A) Filament ammeter
(B) Milliammeter
(C) Voltmeter
(D) Rectifiers Correct Answer (C) Voltmeter
(so as to be able to measure the potential difference
between two points.)
The total brightness gain of an image intensifier is a result
of
1. flux gain.
2. minification gain.
3. focusing gain.
(A) 1 only
(B) 2 only
(C) 1 and 2 only
(D) 1 and 3 only Correct Answer (C) 1 and 2 only
The Brightness Gain of image intensifiers is 5000 to
20,000. This increase is accomplished in two ways.
Correct Answer 1st) as the electron image is focused to
the output phosphor, it is accelerated by high voltage (this
is flux gain).
2nd) the output phosphor is only a fraction of the size of
the input phosphor, and this decrease in image size
represents another Brightness Gain, termed Minification
Gain.
Total Brightness Gain Correct Answer is equal to the
product of Minification Gain and Flux Gain.
,A quality control program includes checks on which of the
following radiographic equipment conditions?
1. Reproducibility
2. Linearity
3. Positive beam limitation/automatic collimation
(A) 1 only
(B) 1 and 2 only
(C) 1 and 3 only
(D) 1, 2, and 3 Correct Answer (D) 1, 2, and 3
(The accuracy of all three is important in order to
ensure adequate patient protection. )
A parallel-plate ionization chamber receives a particular
charge as x-ray photons travel through it. This is the
operating principle of which of the following devices?
(A) Automatic exposure control
(B) Image intensifier
(C) Cine film camera
(D) Spot film camera Correct Answer (A) Automatic
exposure control (AEC)
Which of the following circuit devices operate(s) on the
principle of self-induction?
1. Autotransformer
2. Choke coil
3. High-voltage transformer
(A) 1 only
(B) 1 and 2 only
(C) 2 and 3 only
(D) 1, 2, and 3 Correct Answer (B) 1 and 2 only
, Periodic equipment calibration includes testing of the
1. focal spot.
2. mA.
3. kVp.
(A) 1 only
(B) 1 and 3 only
(C) 2 and 3 only
(D) 1, 2, and 3 Correct Answer (D) 1, 2, and 3
A particular AP thoracic measurement is 25 cm. What
tomographic sections are indicated if we desire one
midline and one each anterior and posterior to midline?
(A) 8, 9, and 10 cm
(B) 10, 11, and 12 cm
(C) 12, 13, and 14 cm
(D) 14, 15, and 16 cm Correct Answer (C) 12, 13, and 14
cm
(If a part measures 25 cm, the midline is 13 cm (there
are 12 cm anterior to the 13-cm level and 12 cm
posterior to the 13-cm level), so the required series of
cuts would be at 12, 13, and 14 cm.)
Congruence of the x-ray beam with the light field is tested
using
(A) a pinhole camera.
(B) a star pattern.
(C) radiopaque objects.
(D) a slit camera. Correct Answer (C) radiopaque objects.
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