GXMO Practice Test
Updated October 2026Facts verified Oct 20, 2026 against Ohio Department of Health
- The Ohio GXMO knowledge exam has 60 multiple-choice questions drawn from the ODH-approved GXMO test plan. (hdmaster.com)
- Candidates have at most 60 minutes to complete the 60-question Ohio GXMO knowledge exam. (hdmaster.com)
- Candidates must score 70% or higher to pass the Ohio GXMO knowledge exam. (hdmaster.com)
- The Ohio GXMO (General X-Ray Machine Operator) licensure knowledge exam costs $175, paid to D&S Diversified Technologies before scheduling. (hdmaster.com)
- Retaking the Ohio GXMO knowledge exam costs $175, the same as the first attempt. (hdmaster.com)
- Ohio GXMO candidates have unlimited attempts to pass the knowledge exam after completing an accredited didactic program, but must pay the fee again before scheduling each retest. (hdmaster.com)
- An Ohio GXMO license first expires on the licensee's birthday two years after it is issued, and then expires every two years on that birthday. (codes.ohio.gov)
- The Ohio GXMO knowledge exam is taken on internet-connected computers at Ohio test sites, or online from home with a remote proctor using Respondus LockDown Browser. (hdmaster.com)
- To take the Ohio GXMO exam, a candidate must complete an ODH-accredited GXMO didactic program or have completed at least one year of a radiologic technology program; the license also requires at least one accredited clinical module and a minimum age of 18. (hdmaster.com)
Facts verified Oct 20, 2026 against Ohio Department of Health. Dates that have passed are removed automatically.
GXMO Exam at a Glance
| Item | Detail | Official source |
|---|---|---|
| Number of questions | 60 multiple-choice questions | hdmaster.com |
| Time limit | 60 minutes | hdmaster.com |
| Passing score | 70% or higher | hdmaster.com |
| Exam fee | $175 knowledge exam fee | hdmaster.com |
| Retake fee | $175 per retake | hdmaster.com |
| Retake policy | Unlimited attempts; pay before each retest | hdmaster.com |
| Validity | 2 years; expires on licensee's birthday | codes.ohio.gov |
| Delivery | Computer-based at Ohio test sites or remotely proctored online | hdmaster.com |
| Eligibility | ODH-accredited GXMO didactic program, or 1+ year in a radiologic technology program | hdmaster.com |
| Score release | After 7:00 PM ET the next business day, in TMU | hdmaster.com |
| Registration deadline | Schedule/reschedule up to 1 business day before the exam | hdmaster.com |
Facts verified Oct 20, 2026 against Ohio Department of Health. Dates that have passed are removed automatically.
GXMO (General X-Ray Machine Operator) Test: Prep Guide
If you're looking to become a radiologic technologist or move up in the medical imaging field, you'll need to pass the GXMO (General X-Ray Machine Operator) Test. This guide is here to help you get ready for the exam. It doesn't matter if you're just starting or have years of experience. We'll give you the skills and confidence you need to pass the GXMO exam.
GXMO Practice Test Questions
Prepare for the GXMO - General X-Ray Machine Operator exam with our free practice test modules. Each quiz covers key topics to help you pass on your first try.
GXMO Anatomy and Radiographic Procedures
GXMO Exam Questions covering GXMO Anatomy and Radiographic Procedures. Master GXMO Test concepts for certification prep.
GXMO Quality Control and Maintenance
Free GXMO Practice Test featuring GXMO Quality Control and Maintenance. Improve your GXMO Exam score with mock test prep.
GXMO Image Quality
GXMO Mock Exam on Image Quality. GXMO Study Guide questions to pass on your first try.
GXMO Image Quality and Interpretation
GXMO Test Prep for Image Quality and Interpretation. Practice GXMO Quiz questions and boost your score.
GXMO Patient Care and Positioning
GXMO Questions and Answers on Patient Care and Positioning. Free GXMO practice for exam readiness.
GXMO Patient Positioning
GXMO Mock Test covering Patient Positioning. Online GXMO Test practice with instant feedback.
GXMO Radiation Physics and Safety
Free GXMO Quiz on Radiation Physics and Safety. GXMO Exam prep questions with detailed explanations.
GXMO Radiation Safety
GXMO Practice Questions for Radiation Safety. Build confidence for your GXMO certification exam.
Key Takeaways
- Understand the radiography certification requirements for the GXMO test
- Develop expertise in the operation of x-ray machines and equipment
- Familiarize yourself with radiation safety practices and patient positioning guidelines
- Strengthen your knowledge of human anatomy and image acquisition techniques
- Prepare for the GXMO exam with a focus on regulatory compliance, quality assurance, and continuing education requirements
Understanding Radiography Certification Requirements
Mastering the GXMO (General X-Ray Machine Operator) Test
Getting ready for the GXMO (General X-Ray Machine Operator) test means knowing what your state needs for radiography certification. This test checks your skills in using x-ray machines, keeping patients safe from radiation, and caring for them. It's a big test that covers a lot of important topics.
First, learn what your state wants for the exam. You might need certain classes, hours of training, or other things. Meeting these requirements shows you're serious about medical imaging. It also helps you do well on the GXMO test.
Developing Expertise in X-Ray Machine Operation
Knowing how to use x-ray machines is key for the GXMO test. Learn about the different machines, their parts, and how to use them right. Also, learn about keeping machines in good shape, checking their quality, and following rules to prove you know your stuff in radiography certification and x-ray technician exam.
By focusing on the certification needs and improving your x-ray skills, you're getting closer to mastering the GXMO (General X-Ray Machine Operator) test. You'll show you're good at your job as a medical imaging technologist.
Radiation Safety Practices and Patient Positioning Guidelines
Essential Topics for GXMO Exam Preparation
The GXMO (General X-Ray Machine Operator) exam checks your skills in several areas. These include radiation safety, how to position patients, anatomy, and taking images. Preparing well in these areas is key to doing well on the exam.
Radiation safety is very important in radiography. The GXMO exam will test your knowledge of how to protect patients and staff from radiation. Make sure you know the latest safety rules and how to follow them.
Knowing how to position patients right is also crucial. You need to make sure patients are set up correctly for x-rays. This helps get good images while keeping radiation and discomfort low. Learn different ways to position patients based on their body and health needs.
Anatomy Knowledge and Image Acquisition Techniques
Knowing human anatomy is a must for the GXMO exam. You'll need to show you understand where and how different body parts work together. This helps you place patients right and take clear x-ray images.
The exam will also test your skills in taking images. Learn how to set up for good x-ray pictures, including right exposure and positioning. Being able to check if images are clear and useful is key for the exam.
| Key Topic | Exam Importance |
|---|---|
| Radiation Safety Practices | High |
| Patient Positioning Guidelines | High |
| Anatomy Knowledge | High |
| Image Acquisition Techniques | High |
Mastering these topics will help you pass the GXMO exam and show you're skilled in x-ray operations. Keep up with new rules and standards to make sure your knowledge is fresh and up-to-date.
- +Validates your knowledge and skills objectively
- +Increases job market competitiveness
- +Provides structured learning goals
- +Networking opportunities with other certified professionals
- −Study materials can be expensive
- −Exam anxiety can affect performance
- −Requires dedicated preparation time
- −Retake fees apply if you don't pass
🪪 What is a GXMO license in Ohio?
A GXMO (General X-Ray Machine Operator) license is a limited radiography license issued by the Ohio Department of Health. It lets the holder perform x-rays of specific body areas under supervision, and it is commonly earned by medical assistants and nurses working in offices or outpatient clinics.
START GXMO PRACTICE TEST📝 How many questions are on the GXMO exam?
The Ohio GXMO Knowledge Exam has 60 multiple-choice questions. Since March 2025 you get a maximum of 60 minutes to finish (it was previously 90 minutes), and the proctor announces when 15 minutes remain.
START GXMO PRACTICE TEST🎯 What score do you need to pass the GXMO test?
You must score at least 70% on the GXMO Knowledge Exam to pass. Your printed passing result from your TMU record is one of the documents you submit with your ODH license application.
START GXMO PRACTICE TEST💵 How much does the GXMO exam cost?
The GXMO Knowledge Exam costs $175, and each retake is also $175. Fees are paid online by Visa or Mastercard in your TMU account before you can schedule a test date; refunds requested within 30 days carry a $35 processing fee.
START GXMO PRACTICE TEST🏢 Who gives the Ohio GXMO exam and how do I register?
The exam is administered for ODH by D&S Diversified Technologies (Headmaster). Your training program usually enters you into the TestMaster Universe system at ox.tmutest.com, where you pay, pick a test site and date, and later view results.
START GXMO PRACTICE TEST📊 What topics are on the GXMO exam?
The 60 questions cover 11 areas. The largest are Radiation Safety Basics (9), Technique (9), Digital Imaging (8) and X-Ray Tube Design and Formation of X-rays (7), followed by Operator Safety (6), Patient Safety (6), Primary Radiologic Image (4) and X-Rays, Ionization and Matter (4).
START GXMO PRACTICE TEST🔁 How many times can you retake the GXMO exam?
There is no attempt limit: after completing an approved didactic program you may retake the Knowledge Exam as many times as needed. You pay the $175 fee again before scheduling each retest, and official results post after 8:00 PM ET the next business day.
START GXMO PRACTICE TEST🪜 What are the steps to get a GXMO license?
First complete an ODH-accredited GXMO didactic program, then pass the Knowledge Exam with 70% or higher. Next finish at least one ODH-accredited clinical module for the body areas you will x-ray, and finally submit the ODH licensure application with fee and certificates.
START GXMO PRACTICE TEST📏 What is the inverse square law in radiography?
Beam intensity is inversely proportional to the square of the distance from the source. Doubling the distance cuts exposure to one quarter, and tripling it cuts exposure to one ninth, which is why stepping back is one of the most effective protection methods.
START GXMO PRACTICE TEST🛡️ What are the cardinal principles of radiation protection?
The three cardinal principles are time, distance and shielding: minimize time near the source, maximize distance from it, and place protective barriers or lead between you and the beam. Together they put the ALARA principle (As Low As Reasonably Achievable) into practice.
START GXMO PRACTICE TESTGXMO Test Questions and Answers
Official Resources
- Ohio Department of Health – Radiologic Licensure: the state agency that issues, amends and renews Ohio GXMO licenses and accredits GXMO training programs.
- D&S Diversified Technologies – Ohio GXMO Testing: the exam vendor's page with the GXMO Candidate Handbook, didactic syllabus and vocabulary word list.
- Ohio X-Ray TestMaster Universe (TMU): the candidate portal used to pay exam fees, schedule a test date and view official GXMO results.
How this page was made: written with AI tools and published by Nathan Beja, founder of Practice Test Geeks, who is responsible for its content. Exam facts are checked against the official sources listed below. Not reviewed by a subject-matter expert. Editorial policy
Sources & references
Exam facts on this page (fees, format, dates, passing scores) are checked against these official sources; the date is our last check. Editorial policy
- codes.ohio.gov — Score validity · verified Oct 2026
- hdmaster.com — Test delivery, eligibility, fees, exam format, passing score, registration deadline, retake fee, retake policy, score release, time limit · verified Oct 2026