PracticeVideosBlogFlashcardsEspañol
All Practice Exams

100+ Free CAMRT Radiation Therapy Practice Questions

Pass your CAMRT Radiation Therapy National Certification Exam exam on the first try — instant access, no signup required.

✓ No registration✓ No credit card✓ No hidden fees✓ Start practicing immediately
100+ Questions
100% Free

Loading practice questions...

Same family resources

Explore More Canadian Medical Imaging Exams (CAMRT)

Continue into nearby exams from the same family. Each card keeps practice questions, study guides, flashcards, videos, and articles in one place.

CAMRT National Certification Exam — Magnetic Resonance (MRI)

Practice Questions

CAMRT National Certification Exam — Radiological Technology

Practice Questions

CAMRT Nuclear Medicine Certification

Practice Questions
2026 Statistics

Key Facts: CAMRT Radiation Therapy Exam

185 questions

Multiple-choice questions on the CAMRT certification exam

CAMRT Radiation Therapy Exam Blueprint (May 2024)

4 hours

Time allowed to complete the certification exam

CAMRT General Preparation Guide

100% multiple choice

All questions on the certification exam are multiple choice

CAMRT General Preparation Guide

CAD $980

CAMRT certification exam fee, plus a proctoring or test-centre fee

CAMRT Exam Dates and Fees

3 times a year

Certification exam is offered three times per year

CAMRT General Preparation Guide

70-85%

Share of questions under the Clinical Expert competency role

CAMRT Radiation Therapy Exam Blueprint (May 2024)

Yardstick

Computer-based exam is delivered by Yardstick Testing and Training

CAMRT General Preparation Guide

100

Free original practice questions here

OpenExamPrep

The CAMRT Radiation Therapy National Certification Exam is the entry-to-practice exam for radiation therapists in Canada. It is a computer-based, 100% multiple-choice exam of 185 questions completed in four hours, delivered by Yardstick and offered three times a year. The fee is CAD $980 plus a proctoring or test-centre fee. There is no fixed percentage pass mark; the cut score is set by the discipline Exam Validation Committee and results are reported pass or fail. The blueprint is organized by MRT professional roles, with Clinical Expert competencies the largest share (70-85%). This 100-question bank gives original multiple-choice practice across radiobiology, physics, planning and dosimetry, delivery, oncology and patient care.

Sample CAMRT Radiation Therapy Practice Questions

Try these sample questions to test your CAMRT Radiation Therapy exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1According to the linear-quadratic model of cell survival, the alpha/beta ratio describes the dose at which:
A.The cell becomes fully oxygenated
B.The linear (alpha) and quadratic (beta) components of cell kill are equal
C.The tumour control probability reaches 50%
D.All clonogenic cells are sterilized
Explanation: In the linear-quadratic model, survival depends on alpha*D + beta*D^2. The alpha/beta ratio is the dose (in Gy) at which the linear and quadratic contributions to cell killing are equal. Late-responding tissues have a low alpha/beta (~3 Gy) and acute/tumour tissues a high alpha/beta (~10 Gy).
2Which of the four Rs of radiobiology explains why dividing a treatment into many fractions spares late-responding normal tissue more than tumour tissue?
A.Reoxygenation
B.Repopulation
C.Repair of sublethal damage
D.Redistribution
Explanation: Repair of sublethal damage between fractions favours late-responding normal tissues, which have a greater capacity to repair than most tumours. Fractionation exploits this differential repair to spare normal tissue while still controlling the tumour.
3A late-responding normal tissue typically has which alpha/beta ratio?
A.About 3 Gy
B.About 10 Gy
C.About 25 Gy
D.About 50 Gy
Explanation: Late-responding tissues (such as spinal cord, kidney and lung) have a low alpha/beta ratio of approximately 3 Gy, making them more sensitive to large fraction sizes. Acutely responding tissues and most tumours have a high alpha/beta of about 10 Gy.
4The oxygen enhancement ratio (OER) for low-LET radiation such as megavoltage photons is approximately:
A.1.0
B.2.5 to 3.0
C.5.0 to 6.0
D.10.0
Explanation: For low-LET radiation, well-oxygenated cells are about 2.5 to 3 times more radiosensitive than hypoxic cells, giving an OER of roughly 2.5 to 3.0. Hypoxic tumour regions are therefore relatively radioresistant.
5Which effect is classified as a stochastic (probabilistic) effect of radiation rather than a deterministic effect?
A.Cataract formation
B.Skin erythema
C.Radiation-induced cancer
D.Acute radiation syndrome
Explanation: Stochastic effects, such as radiation-induced cancer and heritable effects, have no threshold and their probability increases with dose while severity does not. Deterministic (tissue-reaction) effects such as cataracts and erythema have a threshold dose and increasing severity with dose.
6The ALARA principle in radiation protection stands for keeping doses:
A.At the legal annual radiation allowance
B.As low as reasonably achievable
C.Above the lowest acceptable radiation amount
D.Adjusted to local average radiation activity
Explanation: ALARA means As Low As Reasonably Achievable, taking economic and social factors into account. It guides time, distance and shielding decisions to minimize dose to patients, staff and the public.
7If the distance from a point radiation source is doubled, the exposure rate (assuming no attenuation) becomes:
A.Half the original
B.One quarter of the original
C.Twice the original
D.Unchanged
Explanation: The inverse-square law states intensity is proportional to 1/distance^2. Doubling the distance reduces intensity to (1/2)^2 = 1/4 of the original. This is why maximizing distance is an effective protection measure, for example in brachytherapy.
8The three primary cardinal principles of external radiation protection are:
A.Time, distance and shielding
B.Filtration, collimation and grids
C.Dose, energy and field size
D.Calibration, verification and documentation
Explanation: The three cardinal principles of protection from external radiation sources are minimizing time, maximizing distance and using appropriate shielding. Together they reduce occupational and public exposure.
9Which radiosensitive cell type is generally the MOST sensitive to radiation according to the law of Bergonie and Tribondeau?
A.Mature nerve cells
B.Lymphocytes
C.Muscle cells
D.Mature red blood cells
Explanation: The law of Bergonie and Tribondeau states that cells are more radiosensitive when they are highly mitotic and undifferentiated. Lymphocytes are an exception that are highly radiosensitive despite being relatively mature, making them among the most sensitive cells.
10Reoxygenation between fractions improves tumour control because it:
A.Reduces the total dose required
B.Makes previously hypoxic, radioresistant cells more radiosensitive
C.Repairs normal-tissue DNA damage
D.Slows tumour repopulation
Explanation: After a fraction kills well-oxygenated cells, previously hypoxic cells gain access to oxygen and reoxygenate, becoming more radiosensitive for the next fraction. This is a key advantage of fractionated radiotherapy for tumour control.

About the CAMRT Radiation Therapy Exam

The CAMRT Radiation Therapy National Certification Exam is the entry-to-practice examination required to become a certified radiation therapist (RTT) in Canada. It is a computer-based exam of 185 multiple-choice questions completed in four hours, delivered by Yardstick Testing and Training, and offered three times per year. The exam is competency-based: it is built from the radiation therapy competency profile and blueprint and tests how candidates apply knowledge in clinical scenarios rather than direct recall. Content spans radiobiology, radiation physics, treatment planning and dosimetry, treatment delivery on linear accelerators (including IMRT, VMAT, SBRT and brachytherapy), patient positioning and immobilization, oncology and cancer staging, side-effect management, radiation protection, anatomy, quality control, and patient care. Most questions fall under the Clinical Expert role, with smaller proportions assessing the Care Provider and professional roles.

Assessment

185 multiple-choice questions built from the radiation therapy exam blueprint. The blueprint is organized by MRT professional roles, with Clinical Expert competencies (70-85%) the largest category, followed by Care Provider (10-20%) and the Professional/Communicator/Collaborator roles (5-10%).

Time Limit

Four (4) hours to complete all 185 questions.

Passing Score

No fixed percentage. The cut score is set by the discipline Exam Validation Committee through criterion-referenced standard setting, and results are reported as pass or fail.

Exam Fee

CAD $980 exam fee, plus a remote-proctoring fee (about CAD $86-$89 plus tax) or a test-centre fee (about CAD $167-$172 plus tax). Fees are in Canadian dollars and subject to change. (Canadian Association of Medical Radiation Technologists (CAMRT); delivered by Yardstick Testing and Training)

CAMRT Radiation Therapy Exam Content Outline

20%

Radiobiology and Radiation Protection

Cell survival and the linear-quadratic model, the four Rs of radiobiology, fractionation, alpha/beta ratios, oxygen effect, deterministic and stochastic effects, ALARA, shielding, dose limits, and radiation safety for patients, staff and the public.

20%

Radiation Physics and Treatment Delivery

Photon and electron interactions, percent depth dose, beam quality, linear accelerator operation, IMRT, VMAT, SBRT/SRS, brachytherapy sources and afterloading, MLC and treatment delivery techniques.

20%

Treatment Planning and Dosimetry

CT simulation, target volume definitions (GTV/CTV/PTV/OAR), dose prescription and calculation, MU calculation, isodose distributions, DVH evaluation, plan optimization and dose constraints to organs at risk.

20%

Oncology, Anatomy and Cancer Management

Cross-sectional and radiation anatomy, tumour biology, TNM staging, common cancer sites and their typical dose-fractionation regimens, combined-modality treatment and palliative radiation.

20%

Patient Care, Positioning and Quality Control

Patient assessment and education, positioning and immobilization, image-guided setup verification, side-effect monitoring and management, professional conduct, documentation, and machine and plan quality-control checks.

How to Pass the CAMRT Radiation Therapy Exam

What You Need to Know

  • Passing score: No fixed percentage. The cut score is set by the discipline Exam Validation Committee through criterion-referenced standard setting, and results are reported as pass or fail.
  • Assessment: 185 multiple-choice questions built from the radiation therapy exam blueprint. The blueprint is organized by MRT professional roles, with Clinical Expert competencies (70-85%) the largest category, followed by Care Provider (10-20%) and the Professional/Communicator/Collaborator roles (5-10%).
  • Time limit: Four (4) hours to complete all 185 questions.
  • Exam fee: CAD $980 exam fee, plus a remote-proctoring fee (about CAD $86-$89 plus tax) or a test-centre fee (about CAD $167-$172 plus tax). Fees are in Canadian dollars and subject to change.

Keys to Passing

  • Complete 500+ practice questions
  • Score 80%+ consistently before scheduling
  • Focus on highest-weighted sections
  • Use our AI tutor for tough concepts

CAMRT Radiation Therapy Study Tips from Top Performers

1Study from the CAMRT radiation therapy competency profile and exam blueprint first; the blueprint tells you that Clinical Expert competencies carry the most weight (70-85%), so prioritize protection, treatment systems, planning, dosimetry and delivery.
2Practice scenario reasoning. The exam is competency-based, so train yourself to pick the safest or most appropriate action rather than just recalling a fact.
3Drill core calculations until they are automatic: MU calculations, percent depth dose, equivalent square, inverse-square law and basic dose-fractionation conversions.
4Learn radiobiology cold: the four Rs, the linear-quadratic model and alpha/beta ratios, the oxygen effect, and the difference between deterministic and stochastic effects.
5Memorize standard dose-fractionation regimens and key organ-at-risk dose constraints for common sites (breast, prostate, head and neck, lung, palliative bone).
6Use the official $75 CAMRT practice exam late in your preparation to rehearse the Yardstick platform, four-hour timing and competency-style questions under realistic conditions.

Frequently Asked Questions

How many questions are on the CAMRT radiation therapy certification exam?

The exam has 185 multiple-choice questions and candidates are given four hours to complete it. It is delivered by computer through Yardstick Testing and Training.

What is the passing score for the CAMRT exam?

There is no fixed percentage pass mark. The cut score is set by the discipline Exam Validation Committee through a criterion-referenced standard-setting process, and results are reported as pass or fail.

How much does the CAMRT certification exam cost?

The exam fee is CAD $980, plus a remote-proctoring fee (about CAD $86-$89 plus tax) or a test-centre fee (about CAD $167-$172 plus tax). Fees are in Canadian dollars and subject to change.

Is the CAMRT radiation therapy exam multiple choice?

Yes. The certification exam is 100% multiple-choice. It is competency-based, so many questions present a clinical scenario and ask for the most appropriate, safest or most correct action.

How often is the CAMRT exam offered?

The certification exam is offered three times a year, typically with September, January and May sittings. Registration windows and dates are published on the CAMRT website.

What content does the radiation therapy exam cover?

It follows the radiation therapy blueprint built around the MRT professional roles. Most questions fall under the Clinical Expert role (70-85%), covering radiation protection, treatment systems, planning, dosimetry and delivery, with Care Provider and professional roles covering the rest.