Use this page as your CBET review hub, then launch the full 75-question interactive practice test when you are ready to test yourself. Review key topics including medical equipment, troubleshooting, electrical safety, patient monitoring systems, imaging, networking, and electronics.
The interactive exam is separate from the study content below, so you can review first, test yourself, identify weak areas, and return to the guide for targeted reinforcement.
🔥 Start the 75-Question CBET Practice TestMost CBET study resources focus on memorization. This practice test is built to simulate real exam thinking. Instead of just recalling facts, you will identify equipment, apply concepts, and troubleshoot scenarios similar to the actual certification exam.
Each question is designed to reinforce real-world biomedical equipment knowledge so you can move beyond guessing and start recognizing patterns.
The Certified Biomedical Equipment Technician (CBET) exam evaluates your ability to understand, maintain, and troubleshoot medical equipment. Questions typically cover equipment function, safety standards, electronics, and clinical applications.
This 75-question CBET practice test is designed to simulate exam conditions. Try completing the test in one sitting and track your time to improve both speed and accuracy.
Consistent timed practice helps build confidence and reduces test-day anxiety.
1. What device measures oxygen saturation?
A. ECG
B. Pulse oximeter
C. Ventilator
D. Infusion pump
Answer: B
2. What is the purpose of a defibrillator?
A. Monitor heart rhythm
B. Deliver shock to restore rhythm
C. Measure blood pressure
D. Deliver oxygen
Answer: B
3. What does Ohm’s Law state?
A. V = IR
B. P = IV
C. E = mc²
D. F = ma
Answer: A
The CBET exam includes a wide range of multiple-choice questions covering biomedical equipment, safety, and troubleshooting concepts.
Yes. MedSkillBuilder provides free interactive CBET practice questions to help you prepare effectively.
Focus on understanding equipment functionality, practicing troubleshooting, and using repeated testing to reinforce knowledge.
Use this page as a complete CBET review guide. When you are ready, launch the separate 75-question interactive practice test, identify weak domains, then return to the matching sections below before retesting.
4. What converts AC to DC? Rectifier.
5. What is the first thing to check when equipment has no power? Power source, cord, fuse, and AC inlet.
This section builds the electronics foundation that every CBET candidate should understand. Focus on concepts rather than memorizing formulas.
| Formula | Meaning |
|---|---|
| V = I × R | Ohm's Law |
| P = V × I | Electrical Power |
| I = V ÷ R | Current |
| R = V ÷ I | Resistance |
| Component | Function |
|---|---|
| Fuse | Protects against excessive current. |
| Capacitor | Stores electrical energy and filters ripple. |
| Diode | Allows current to flow in one direction. |
| Rectifier | Converts AC into DC. |
| Transformer | Changes AC voltage and can provide isolation. |
6. A 24-volt source is connected to a 12-ohm resistor. Current equals 2 amps.
7. Which circuit continues operating if one branch fails? Parallel circuit.
8. Which component smooths DC ripple? Capacitor.
9. Which component changes AC voltage? Transformer.
10. Which component protects against excessive current? Fuse.
Every time you miss an electronics question, solve the problem by hand instead of memorizing the answer. Repetition builds recognition and improves troubleshooting skills.
Electrical safety is one of the most important responsibilities of a Biomedical Equipment Technician. A CBET candidate should understand not only how equipment functions, but how to identify conditions that may place patients or staff at risk.
| Concept | Description | Exam Tip |
|---|---|---|
| Grounding | Provides a low-resistance path for fault current. | Always inspect the power cord and ground pin first. |
| Leakage Current | Small unintended electrical current that may flow from equipment. | Verify using an electrical safety analyzer. |
| Protective Earth | Helps protect users from electrical shock. | Never ignore a broken ground connection. |
| Isolation | Separates hazardous voltages from patients. | Understand isolated power concepts. |
11. What should be performed after most repairs before returning equipment to clinical use?
Answer: Functional verification and electrical safety testing.
12. A missing ground pin represents what type of concern?
Answer: A patient and user electrical safety hazard.
13. What instrument is commonly used to measure leakage current?
Answer: An electrical safety analyzer.
14. During preventive maintenance, what should always be documented?
Answer: Findings, repairs, testing performed, and return-to-service status.
15. Which should be investigated before replacing an expensive circuit board?
Answer: Power source, accessories, cables, connectors, settings, and external failures.
This section covers high-yield CBET topics involving physiologic monitoring equipment. Understanding common failures is more important than memorizing model numbers.
| Component | Purpose | Common Issue |
|---|---|---|
| Electrodes | Acquire cardiac signal | Dry or poorly attached electrodes |
| Lead wires | Transmit ECG signal | Broken conductors, intermittent noise |
| Monitor | Displays rhythm | Artifact, damaged input channel |
| Failure | First Check |
|---|---|
| Cuff won't inflate | Leaks, tubing, pump, connectors |
| Erratic readings | Correct cuff size and placement |
| Repeated errors | Valve, hose, obstruction |
ETCO₂ monitoring evaluates exhaled carbon dioxide. Missing waveforms are commonly caused by disconnected sampling lines, airway problems, or damaged accessories.
16. The most common cause of ECG artifact is poor electrode contact or damaged lead wires.
17. A pulse oximeter has intermittent readings. What should be checked first? Sensor placement, cable, and perfusion.
18. An NIBP cuff will not inflate. What is the most likely first failure? Leaking cuff or tubing.
19. What device is commonly used to verify monitor operation? A patient simulator.
20. What is the best troubleshooting habit? Start with simple external causes before replacing circuit boards.
This section reviews the imaging concepts most frequently encountered by Biomedical Equipment Technicians. You do not need to be an imaging specialist, but you should understand how these systems work, common failure points, and the major safety concerns.
| Modality | Energy Source | Primary Safety Concern | Common BMET Issue |
|---|---|---|---|
| X-ray | Ionizing radiation | Radiation exposure | Generator, detector, collimator faults |
| CT | Rotating X-ray tube | Radiation dose | Gantry, detector, cooling issues |
| MRI | Magnetic field & RF | Projectile hazards, implants | Coils, cryogen systems, accessories |
| Ultrasound | Sound waves | Probe care | Probe elements, cables, connectors |
DICOM is the standard for storing and transmitting medical images. PACS archives, routes, and retrieves those images throughout the hospital.
21. Which modality uses ionizing radiation? X-ray and CT.
22. Which imaging modality uses a strong magnetic field? MRI.
23. What standard is used for medical image communication? DICOM.
24. Images are not reaching the archive. What should be checked first? PACS/DICOM network communication.
25. A consistent dropout line on an ultrasound image most commonly suggests what? A damaged probe element or cable.
This section covers equipment that directly delivers therapy. CBET questions often focus on safe operation, common failures, preventive maintenance, and systematic troubleshooting.
| Equipment | Primary Purpose | High-Yield Failure Points |
|---|---|---|
| Ventilator | Provides mechanical ventilation. | Leaks, flow sensors, valves, alarms. |
| Anesthesia Machine | Delivers anesthetic gases safely. | Leaks, vaporizers, oxygen analyzer, scavenging. |
| Infusion Pump | Delivers fluids and medications. | Occlusions, door sensors, air-in-line detection. |
| Defibrillator | Delivers therapeutic electrical energy. | Battery, paddles, energy delivery verification. |
| Electrosurgical Unit | Cuts/coagulates tissue using RF energy. | Return electrode, alarms, output verification. |
| Sterilizer | Sterilizes instruments. | Temperature, pressure, cycle verification. |
Case 1: Ventilator fails pre-use test.
First actions: Inspect breathing circuit, filters, valves, and leak points before suspecting internal failure.
Case 2: Infusion pump repeatedly alarms for occlusion.
First actions: Inspect tubing, cassette, downstream obstruction, and door latch before replacing hardware.
Case 3: Defibrillator battery runtime is poor.
First actions: Verify battery health, charger operation, and perform an energy delivery test.
Case 4: ESU reports return electrode alarm.
First actions: Verify pad placement, cable integrity, and contact quality.
26. A ventilator fails its leak test. What should be inspected first? Breathing circuit and external leak points.
27. Which analyzer is commonly used during preventive maintenance of infusion pumps? Infusion device analyzer.
28. Before returning a defibrillator to service, what must be verified? Energy delivery and functional performance.
29. An ESU return electrode alarm most commonly suggests what? Poor pad contact or cable issue.
30. Which document is completed after PM or corrective maintenance? Service documentation in the CMMS.
This section introduces networking and healthcare IT concepts frequently encountered by modern BMETs. As more medical devices become network-connected, understanding communication and security is increasingly important.
| Concept | Description | Why BMETs Care |
|---|---|---|
| IP Address | Unique network identifier. | Needed for device communication. |
| DHCP | Automatically assigns IP addresses. | Incorrect settings may prevent connectivity. |
| DNS | Translates names into IP addresses. | Supports server communication. |
| VLAN | Logical network separation. | Improves security and traffic management. |
| MAC Address | Unique hardware identifier. | Useful during device registration. |
| Standard | Purpose |
|---|---|
| DICOM | Medical image storage and transfer. |
| HL7 | Clinical messaging and patient information exchange. |
31. What assigns IP addresses automatically? DHCP.
32. Which standard is primarily associated with medical images? DICOM.
33. Which standard exchanges clinical messages? HL7.
34. What uniquely identifies a network interface? MAC address.
35. A networked monitor suddenly cannot communicate with the server. What should be checked first? Network connection, IP configuration, and switch connectivity before replacing hardware.
These scenarios mirror the style of thinking expected from experienced BMETs. Focus on a logical process instead of jumping directly to component replacement.
36. A monitor intermittently loses ECG. What is the most likely first failure? Electrodes or lead wires.
37. A ventilator suddenly fails leak testing after tubing replacement. What should be checked first? External breathing circuit assembly.
38. A networked infusion pump cannot communicate with the server. What should be verified before replacing hardware? Network connectivity and IP configuration.
39. A defibrillator passes self-test but battery runtime is poor. What should be evaluated? Battery health and charger performance.
40. Which troubleshooting philosophy best reflects CBET practice? Start simple, isolate the failure, verify the repair, and document the results.
| Concept | Key Takeaway |
|---|---|
| Ohm's Law | Voltage = Current × Resistance |
| Power | P = V × I |
| Fuse | Protects against excessive current. |
| Diode | Current flows one direction. |
| Rectifier | Converts AC to DC. |
| Transformer | Changes AC voltage. |
| Leakage Current | Verify with safety analyzer. |
| Grounding | Critical for patient safety. |
| DICOM | Medical image communication. |
| HL7 | Clinical messaging. |
| PACS | Image archive. |
| MRI | Magnetic field hazards. |
| ECG Artifact | Usually electrodes or lead wires. |
| SpO₂ | Check sensor first. |
| NIBP | Inspect cuff and tubing. |
| Ventilator | Leaks are common. |
| Infusion Pump | Check tubing before hardware. |
| Defibrillator | Verify energy delivery. |
| CMMS | Accurate documentation matters. |
| Troubleshooting | Start simple and work methodically. |
Launch the full 75-question interactive CBET practice test now and see where you stand. Use your results to identify weak areas, then return to this guide for focused review.
🚀 Launch the 75-Question CBET Practice Test