How many questions are on the NMTCB nuclear medicine exam?

90 items per examinee, including some unscored pretest questions. It is adaptive, so the items differ between candidates.

Is the NMTCB exam computer adaptive?

Yes. NMTCB uses a form of adaptive testing aimed at reaching an accurate pass or fail decision, so a clearly strong or clearly weak performance can be classified with fewer items.

How many questions are on the ARRT(N) exam?

200 scored questions on a fixed form, with procedures the largest category at 117.

Are the practice questions free?

25 questions are free with no card and no account. The full bank of 500, the case studies and the mock exams are the paid tier.

Does it work on a phone?

Yes — iPhone, Android and any browser. Progress follows your account across devices.

NucMed Boards Prep

NMTCB · ARRT(N)

NMTCB practice questions that explain the why

500 board-style questions across all five domains, each with a worked explanation — so the gaps show up now, not on exam day.

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Which of the following is a deterministic effect of radiation?

WHYRadiation-induced cataracts are a deterministic effect with a threshold dose (~0.5-2 Gy). Leukemia, thyroid cancer, and genetic mutations are stochastic effects with no clear threshold.

Radiation Safety · Radiopharmaceuticals · Instrumentation & QC · Clinical Procedures · Patient Care

What you get

500 NMTCB and ARRT(N) questions
Every answer explained in full
All five domains — 100 questions in each
Clinical case studies and full-length mock exams
Free tier — 25 questions, no card

What is on the NMTCB exam

The NMTCB nuclear medicine exam is a computer adaptive test. Each examinee answers 90 items and the items differ from person to person, so two people sitting on the same day do not see the same exam. A number of unscored pretest questions are mixed in. Because it adapts, the difficulty shifts with your performance as you go.

NMTCB publishes the approximate content distribution as:

Content area	Approx. share
Clinical procedures	40%
Pharmaceutical and radiopharmaceutical agents	25%
Instrument operations and quality control	15%
Radiation safety and regulations	13%
Radiation physics and detection	7%

Source: NMTCB, computer adaptive tests. Always check the board's own page before you sit — outlines change.

How the ARRT(N) exam differs

The ARRT nuclear medicine exam is not adaptive. It is a fixed form of 200 scored questions, and ARRT publishes the number of questions per category rather than a percentage. Under the specifications ARRT approved in January 2026, which take effect on 1 February 2027, the split is:

Content category	Scored questions
Procedures	117
Image production (instrumentation)	30
Safety (physics, radiobiology, regulations)	27
Patient care	26
Total	200

Source: ARRT Examination Content Specifications for Nuclear Medicine Technology, board approved January 2026. Check arrt.org for the specification in force on your exam date.

How this question bank maps to the exams

Plainly: it does not mirror either weighting. The bank holds 100 questions in each of five domains — radiation safety, radiopharmaceuticals, instrumentation and QC, clinical procedures, and patient care — so coverage is even rather than exam-weighted.

That is deliberate. An evenly split bank makes a weak area obvious, because your score in each domain is measured over the same number of questions. A bank weighted 40% toward clinical procedures would bury a patient care gap. Use the readiness diagnostic to find the weak domain, then weight your own revision toward whichever exam you are actually sitting.

One mapping note: patient care is its own scored ARRT category, worth 26 of 200 questions. NMTCB does not list it separately — that material sits inside its clinical procedures and radiation safety areas.

Common questions

How many questions are on the NMTCB nuclear medicine exam?: 90 items per examinee, including some unscored pretest questions. It is adaptive, so the items differ between candidates.
Is the NMTCB exam computer adaptive?: Yes. NMTCB uses a form of adaptive testing aimed at reaching an accurate pass or fail decision, so a clearly strong or clearly weak performance can be classified with fewer items.
How many questions are on the ARRT(N) exam?: 200 scored questions on a fixed form, with procedures the largest category at 117.
Are the practice questions free?: 25 questions are free with no card and no account. The full bank of 500, the case studies and the mock exams are the paid tier.
Does it work on a phone?: Yes — iPhone, Android and any browser. Progress follows your account across devices.

Sitting the CT registry too?

There is a separate bank of 500 questions for the ARRT CT and NMTCB(CT) exams, built the same way.

CT registry practice test →

From someone who sat it

i passed!! this app WILL help — don’t memorize each answer, truly understand the why behind each question. Passed the NMTCB(N), September 2026

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