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Illustration for the Equipment QA ARRT category

ARRT category · 12.5% of exam

Equipment Operation and Quality Assurance

Tests x-ray tube anatomy, photon production, the x-ray circuit, fluoroscopy equipment, image intensifiers, and the QC tolerance schedule. 12.5% of the ARRT exam (25 of 200 scored questions).

328 questions 12.5% of exam 9 topics

Sample question

One free question from the 328-question Equipment QA bank. Read it, pick your answer, then expand the rationale.

Annual QC testing reveals that a generator set to 100 kVp is producing an actual peak voltage of 93 kVp. Is this within the acceptable tolerance?

  1. A. Yes, kVp accuracy tolerance is ±10%
  2. B. No, the kVp is too low, accuracy tolerance is ±5%
  3. C. Yes, kVp tolerance is ±15% for diagnostic equipment
  4. D. No, kVp tolerance is ±2%
Show answer and full rationale

Correct answer: B. No, the kVp is too low, accuracy tolerance is ±5%

A, Incorrect: kVp tolerance is ±5%, not ±10%.

B, Correct: Correct. The kVp accuracy tolerance is ±5% of the indicated value. A 100 kVp setting must produce 95–105 kVp actual. 93 kVp is below the lower limit and the generator must be serviced.

C, Incorrect: kVp tolerance is ±5%, not ±15%. ±15% is the threshold for the 15% density rule, not QC.

D, Incorrect: kVp tolerance is ±5%, not ±2%. Timer tolerance is also ±5%.

Topics tested in this category

  • Cathode and anode anatomy
  • Thermionic emission and electron flow
  • Bremsstrahlung and characteristic radiation
  • Heat units and tube cooling
  • The anode heel effect
  • Transformers (autotransformer, step-up, step-down)
  • Rectification and ripple
  • Image intensifier and brightness gain
  • QC tolerances (kVp ±5%, timer ±5%)

Chapters that cover Equipment QA

These chapters in the Radtechprepper curriculum map to the Equipment QA category. Each is free to skim before you sign up.

Ch 20

Bony Thorax

The RAO sternum and its breathing technique, true vs false vs floating ribs, the rib decision table, and above or below diaphragm breathing rules for the ARRT Radiography exam.

 Ch 21

Skull, Facial Bones & Sinuses for the ARRT Radiography Exam

The cranial positioning lines, Towne and Caldwell angles, Waters vs modified Waters, petrous ridge placement, and the upright sinus rules for the ARRT Radiography exam.

 Ch 22

Abdomen Radiography

Covers the KUB centered at the iliac crest, erect and decubitus views 5 cm above it, the 5-minute upright rule, and the three-image acute abdomen series with a PA chest.

Drill the full 328-question bank.

Free tier includes 50 mixed-category questions. Premium unlocks all 2,584 ARRT-style questions, unlimited generated mock exams, and adaptive drill sessions in this category.

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Frequently asked questions

How many Equipment QA questions are on the ARRT Radiography Boards?

The Equipment Operation and Quality Assurance category is 25 of the 200 scored questions under the 2022 content specification, about 12.5% of the ARRT Radiography Boards exam. The full Radtechprepper practice bank contains 328 questions in this category, giving you ample room to drill until the patterns are second nature.

What topics are tested in the Equipment QA category?

The Equipment QA category tests: Cathode and anode anatomy; Thermionic emission and electron flow; Bremsstrahlung and characteristic radiation; Heat units and tube cooling; The anode heel effect. The full topic list is in ARRT Radiography Content Specifications.

How should I study for the Equipment QA category?

Start with the chapter overviews in this curriculum that map to Equipment QA, they cover the core concepts in plain English. Then drill questions in the practice bank, pause on every miss, read the rationale, and re-drill the same topic the next day. The ARRT exam rewards spaced repetition more than cram studying.

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