(GXMO) General X-Ray Machine Operator Practice Test

(GXMO) General X-Ray Machine Operator Practice Test

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GXMO Practice Test

Updated for October 2026
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  • 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

ItemDetailOfficial source
Number of questions60 multiple-choice questionshdmaster.com
Time limit60 minuteshdmaster.com
Passing score70% or higherhdmaster.com
Exam fee$175 knowledge exam feehdmaster.com
Retake fee$175 per retakehdmaster.com
Retake policyUnlimited attempts; pay before each retesthdmaster.com
Validity2 years; expires on licensee's birthdaycodes.ohio.gov
DeliveryComputer-based at Ohio test sites or remotely proctored onlinehdmaster.com
EligibilityODH-accredited GXMO didactic program, or 1+ year in a radiologic technology programhdmaster.com
Score releaseAfter 7:00 PM ET the next business day, in TMUhdmaster.com
Registration deadlineSchedule/reschedule up to 1 business day before the examhdmaster.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.
GXMO Radiographic Exposure Techniques
GXMO Test Online for Radiographic Exposure Techniques. Free practice with instant results and feedback.
GXMO X-Ray Equipment Operation
GXMO Study Material on X-Ray Equipment Operation. Prepare effectively with real exam-style questions.

Key Takeaways

💡 GXMO Basics

What is GXMO?
GXMO (General X-Ray Machine Operator) is a certification that qualifies individuals to operate and manage X-ray machines in medical and industrial settings, ensuring patient and operator safety.
What is the role of a GXMO?
The role of a GXMO is to operate X-ray machines, ensuring proper positioning of patients and correct exposure levels while maintaining patient safety and compliance with medical regulations.
How do you become a GXMO?
To become a GXMO, you must complete a certified training program, gain hands-on experience, and pass a certification exam. In some regions, a state or national license may be required.
Where do GXMO operators work?
GXMO operators typically work in hospitals, medical clinics, diagnostic imaging centers, and in some industrial sectors that require X-ray inspection for materials and equipment.

📋 GXMO Format

How is a GXMO exam formatted?
The GXMO exam typically includes multiple-choice questions and practical assessments to test knowledge of X-ray safety protocols, operation procedures, and medical ethics.
What subjects are covered in the GXMO exam?
The GXMO exam covers topics like radiation safety, patient positioning, basic anatomy, machine calibration, and legal/ethical considerations in healthcare.
How many questions are on the GXMO exam?
The GXMO exam usually consists of 60 multiple-choice questions, with additional practical assessments to demonstrate competence in operating X-ray equipment.
What is the passing score for the GXMO exam?
The passing score for the GXMO exam typically ranges from 70% to 80%, depending on the specific certification body or region.

📝 GXMO Registration

How do I register for the GXMO exam?
You can register for the GXMO exam through certifying bodies or regulatory agencies in your region. This usually involves completing an application form and paying the exam fee.
What are the registration requirements for the GXMO exam?
To register for the GXMO exam, you must have completed an accredited training program and have the necessary hands-on experience in operating X-ray machines.
What is the GXMO exam fee?
The GXMO exam fee typically ranges from $100 to $500 depending on the certifying organization and location. Some training programs may include exam fees in their tuition costs.
Where can I take the GXMO exam?
The GXMO exam is typically offered at accredited testing centers, hospitals, or professional association offices. Some regions may also offer online or remote proctoring options.

✅ GXMO Passing & Results

How long does it take to get GXMO exam results?
Results for the GXMO exam are usually available within 1-2 weeks after the test. You will receive a report with a score breakdown and any recommendations for additional training if necessary.
What happens if I fail the GXMO exam?
If you fail the GXMO exam, you may retake it after a waiting period of 30-90 days. Some organizations may allow you to retake specific sections of the exam.
Can I retake the GXMO exam if I fail?
Yes, you can retake the GXMO exam, but there may be a mandatory waiting period between attempts. Additional fees may apply for retaking the exam.
What is the GXMO certification valid for?
The GXMO certification is typically valid for 2-5 years, depending on the certifying body. You may need to complete continuing education courses to maintain your certification.

📚 GXMO Preparation

How do I prepare for the GXMO exam?
To prepare for the GXMO exam, study the relevant textbooks, complete hands-on practice, review safety guidelines, and take practice exams to familiarize yourself with the test format.
What resources are available to help me prepare for the GXMO exam?
Resources for GXMO exam preparation include textbooks, online courses, practice exams, and study guides offered by certification bodies and training centers.
How long should I study for the GXMO exam?
It is recommended to study for 6-8 weeks before the GXMO exam, depending on your prior knowledge and experience in radiology and X-ray machine operation.
What is the salary for a GXMO operator?
The average salary for a GXMO operator ranges from $40,000 to $60,000 annually, depending on experience, location, and type of employment.
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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 TopicExam Importance
Radiation Safety PracticesHigh
Patient Positioning GuidelinesHigh
Anatomy KnowledgeHigh
Image Acquisition TechniquesHigh

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.

Pros

  • Validates your knowledge and skills objectively
  • Increases job market competitiveness
  • Provides structured learning goals
  • Networking opportunities with other certified professionals

Cons

  • 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.
📝 📝 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.
🎯 🎯 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.
💵 💵 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.
🏢 🏢 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.
📊 📊 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).
🔁 🔁 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.
🪜 🪜 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.
📏 📏 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.
🛡️ 🛡️ 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.

GXMO Test Questions and Answers

What is GXMO certification?

GXMO (General X-Ray Machine Operator) certification qualifies individuals to operate X-ray machines in medical settings, ensuring safety and compliance with industry standards.

How do I become GXMO certified?

To become GXMO certified, you need to complete a training program, gain hands-on experience, and pass an exam. Certification may also require periodic recertification.

What does GXMO certification include?

GXMO certification includes training on X-ray equipment operation, radiation safety, patient positioning, and proper use of shielding to minimize exposure risks.

How much does GXMO certification cost?

GXMO certification costs vary, typically ranging from $500 to $2,000, depending on the training program and certification body.

Can GXMO certification be used internationally?

GXMO certification is recognized in many countries, but the specific requirements may vary by region. Additional training or certifications may be required for international practice.

How long is the GXMO certification valid for?

GXMO certification is valid for 2-5 years, depending on the certifying body. Renewal may require continuing education or re-examination.

Where can I take the GXMO certification exam?

You can take the GXMO exam at accredited testing centers or online through remote proctoring, depending on the certifying agency.

How do I prepare for the GXMO certification exam?

Prepare for the GXMO certification exam by reviewing the study materials, practicing with X-ray machines, and taking practice tests provided by accredited training programs.

What salary can I expect with GXMO certification?

The average salary for GXMO-certified professionals ranges from $45,000 to $70,000 annually, depending on experience and location.

How many times can I take the GXMO certification exam?

You can take the GXMO exam as many times as needed, with a waiting period of 30-90 days between attempts. Each retake requires paying the full exam fee.

How many questions are on the GXMO?

The Ohio GXMO knowledge exam has 60 multiple-choice questions drawn from the ODH-approved GXMO test plan. (Verified Oct 20, 2026 against hdmaster.com.)

What is the passing score for the GXMO?

Candidates must score 70% or higher to pass the Ohio GXMO knowledge exam. (Verified Oct 20, 2026 against hdmaster.com.)

Official Resources

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