Certified Biomedical Equipment Technician (CBET) — Questions and Answers

Question 1: Which personal protective equipment (PPE) combination is correct when handling liquid chemical sterilants?

Safety glasses and cloth gloves
Face shield, chemical-resistant gloves, and gown (Correct answer)
Safety goggles and shoe covers only
N95 respirator and latex gloves

Correct answer: Face shield, chemical-resistant gloves, and gown

Liquid chemical sterilants are corrosive; a face shield, chemical-resistant gloves, and a gown protect against splashes.

Question 2: Which step in the decontamination process must be performed BEFORE high-level disinfection or sterilization of a reusable device?

Applying a chemical indicator tape
Rinsing with sterile water
Wrapping the device in sterilization pouches
Thorough cleaning to remove organic and inorganic soil (Correct answer)

Correct answer: Thorough cleaning to remove organic and inorganic soil

Cleaning to remove soil is mandatory before HLD or sterilization because organic matter can shield microorganisms from the disinfectant or sterilant.

Question 3: Which class of fire extinguisher is appropriate for an electrical equipment fire in a biomedical equipment room?

Class A
Class B
Class D
Class C (Correct answer)

Correct answer: Class C

Class C extinguishers are rated for energized electrical equipment fires and use non-conductive agents such as CO2 or dry chemical.

Question 4: A 'supplier qualification' process in biomedical QA is intended to:

Ensure that vendors of parts and services meet defined quality and regulatory requirements (Correct answer)
Negotiate lower prices with preferred vendors
Monitor warranty claims submitted to manufacturers
Track delivery times for ordered equipment

Correct answer: Ensure that vendors of parts and services meet defined quality and regulatory requirements

Supplier qualification evaluates and documents that suppliers meet quality, regulatory, and technical requirements before they are approved for use.

Question 5: Which label indicates that a medical device has been evaluated for electrical safety by a Nationally Recognized Testing Laboratory (NRTL) acceptable to OSHA?

UL listing mark or equivalent NRTL mark (Correct answer)
ISO 13485 seal
FDA 510(k) clearance number
CE mark

Correct answer: UL listing mark or equivalent NRTL mark

A UL listing mark (or mark from another OSHA-recognized NRTL such as CSA or ETL) certifies the device meets recognized safety standards.

Question 6: A patient monitor displays a 'low battery' alarm even when plugged into AC power. What is the most likely cause?

Faulty AC/DC power supply board
Loose power cord connection
Software firmware corruption
Depleted battery that cannot hold charge (Correct answer)

Correct answer: Depleted battery that cannot hold charge

A battery that can no longer hold a charge will trigger low-battery alarms even on AC power because it fails to charge above the alarm threshold.

Question 7: A portable suction unit motor runs but produces no suction. What should be inspected first?

Motor speed control board
Electrical fuse
Motor brushes and commutator
Collection canister lid gasket and tubing connections (Correct answer)

Correct answer: Collection canister lid gasket and tubing connections

A failed canister gasket or loose tubing connection breaks the vacuum seal, eliminating suction even with a fully functional motor.

Question 8: A pulse oximeter reads SpO2 at 100% on all patients regardless of their condition. What is the most likely fault?

Photodetector saturation or short circuit (Correct answer)
LED emitter failure — no light emitted
Probe cable open circuit
Incorrect patient mode selected

Correct answer: Photodetector saturation or short circuit

A shorted or saturated photodetector sends a maximum signal to the processor, causing it to always report 100% saturation.

Question 9: Which medical term means the study of the heart?

Cardiology (Correct answer)
Pulmonology
Nephrology
Hematology

Correct answer: Cardiology

Cardiology combines cardi/o (heart) with -logy (study of) to mean the branch of medicine focused on the heart.

Question 10: What is the primary goal of quality assurance in Biomedical Technician Certification?

Ensuring consistent standards and continuous improvement (Correct answer)
Finding someone to blame for errors
Completing tasks as quickly as possible
Reducing staff numbers

Correct answer: Ensuring consistent standards and continuous improvement

Quality assurance focuses on maintaining consistent standards and identifying opportunities for continuous improvement in processes and outcomes.

Question 11: A biomedical technician suspects that a medical device malfunction contributed to a patient adverse event. The first step should be to:

Dispose of the device to prevent further incidents
Contact the manufacturer without informing facility management
Repair the device immediately to restore service
Sequester the device and notify the supervisor and risk management per facility policy (Correct answer)

Correct answer: Sequester the device and notify the supervisor and risk management per facility policy

Suspected involvement of a device in an adverse event requires preserving it as evidence and immediately notifying supervisors and risk management.

Question 12: A 'gage R&R' (repeatability and reproducibility) study in a biomedical quality program is used to:

Calculate the expected lifespan of a measuring instrument
Determine the optimal calibration interval for a test device
Evaluate how much of the total measurement variation is due to the measurement system itself versus the process (Correct answer)
Compare two different brands of test equipment for purchasing decisions

Correct answer: Evaluate how much of the total measurement variation is due to the measurement system itself versus the process

Gage R&R studies partition measurement variation into repeatability (same operator, same device) and reproducibility (different operators), assessing measurement system adequacy.

Question 13: When reviewing a service contract for treatment-critical equipment, which contract term is most important for ensuring patient care continuity?

Whether loaner equipment is available
Number of vendor service engineers nationally
The vendor's headquarters location
Guaranteed response time and maximum permissible downtime (uptime SLA) (Correct answer)

Correct answer: Guaranteed response time and maximum permissible downtime (uptime SLA)

Uptime SLAs and guaranteed response times contractually protect the facility by defining the maximum acceptable interruption to patient treatment services.

Question 14: A biomedical technician finds that a transcutaneous pacemaker fails to capture during an emergency. The most likely equipment-related cause is:

Incorrect ECG lead color coding
Expired device warranty
Inadequate electrode-to-skin contact causing high impedance (Correct answer)
Overcharged battery

Correct answer: Inadequate electrode-to-skin contact causing high impedance

Poor electrode-to-skin contact increases impedance, preventing sufficient current from being delivered to achieve myocardial capture.

Question 15: Which document must a biomedical technician obtain from a medical device manufacturer before integrating the device with hospital IT systems?

ISO 13485 certificate
510(k) clearance letter
Medical Device Security MDS2 form (Correct answer)
FDA 510(b) supplement

Correct answer: Medical Device Security MDS2 form

The MDS2 (Manufacturer Disclosure Statement for Medical Device Security) provides cybersecurity details needed to assess integration risks.

Question 16: During inspection of an autoclave, the technician finds the door gasket is cracked. What is the impact if the autoclave is used in this condition?

Steam pressure may not be maintained, resulting in inadequate sterilization (Correct answer)
No impact; door gaskets are not critical to sterilization
Cycle time will increase but sterilization will still occur
Only the dry heat cycle will be affected

Correct answer: Steam pressure may not be maintained, resulting in inadequate sterilization

A cracked door gasket prevents the autoclave from reaching and holding required steam pressure, compromising sterilization efficacy.

Question 17: A pressure transducer in a patient monitoring system converts mechanical pressure into which type of output signal?

Optical pulses
Magnetic flux changes
Digital binary codes directly
An electrical signal proportional to pressure (Correct answer)

Correct answer: An electrical signal proportional to pressure

A pressure transducer is an electrochemical sensor that produces an electrical signal (typically voltage or current) directly proportional to the applied mechanical pressure.

Question 18: Which test verifies that an isolated power system in an operating room is functioning correctly?

Dielectric withstand test
Chassis leakage current test
Line isolation monitor (LIM) test (Correct answer)
Ground continuity test

Correct answer: Line isolation monitor (LIM) test

The line isolation monitor continuously checks the impedance between the isolated power lines and ground, alarming if isolation degrades.

Question 19: Which of the following best describes 'design validation' in the context of medical device QA?

Verifying that design outputs meet design input specifications
Reviewing engineering drawings for accuracy
Testing the device in a laboratory environment only
Confirming the device meets user needs under actual or simulated conditions (Correct answer)

Correct answer: Confirming the device meets user needs under actual or simulated conditions

Design validation confirms that the finished device meets the intended use requirements under real-world or simulated conditions, including user needs.

Question 20: A biomedical technician finds a damaged ground pin on a patient monitor power cord. The correct response is to:

Reduce the inspection interval and monitor for further degradation
Use a ground fault circuit interrupter (GFCI) outlet as a substitute
Tape the ground pin and continue use until a replacement cord arrives
Replace the power cord before returning the device to service (Correct answer)

Correct answer: Replace the power cord before returning the device to service

A damaged ground pin compromises the protective earth connection; the cord must be replaced before the device is used in patient care.

Question 21: Which professional standard requires biomedical technicians to maintain accurate and complete service records for all medical equipment?

EPA hazardous waste regulations
HIPAA Privacy Rule
OSHA 29 CFR 1910
Joint Commission accreditation standards (Correct answer)

Correct answer: Joint Commission accreditation standards

The Joint Commission requires comprehensive equipment service records as part of hospital accreditation and patient safety standards.

Question 22: A centrifuge shows excessive vibration during operation. Which maintenance action addresses the MOST common cause?

Lubricating the rotor shaft bearings
Replacing the motor brushes
Re-balancing or replacing the rotor and checking for load imbalance (Correct answer)
Replacing the power supply capacitors

Correct answer: Re-balancing or replacing the rotor and checking for load imbalance

Excessive vibration in centrifuges is most commonly caused by unbalanced loads or a damaged rotor; checking balance and rotor integrity is the primary corrective step.

Question 23: In Biomedical Technician Certification, what is the purpose of team-building activities?

To strengthen collaboration, trust, and communication (Correct answer)
To comply with HR requirements
To waste time during work hours
To identify the weakest team member

Correct answer: To strengthen collaboration, trust, and communication

Team-building activities enhance collaboration, build trust among team members, and improve communication skills.

Question 24: Which parameter is NOT typically assessed when a biomedical technician performs an incoming inspection on patient-connected electrical equipment?

Equipment insulation resistance
Chassis leakage current
Patient lead leakage current
Patient's baseline heart rate (Correct answer)

Correct answer: Patient's baseline heart rate

Patient physiological parameters like heart rate are outside the scope of biomedical equipment inspection; technicians assess electrical safety parameters instead.

Question 25: What does 'as-found' data mean in a calibration record?

The measurement values recorded before any adjustments during a calibration (Correct answer)
Data recorded after adjustments are made
Data from the last preventive maintenance visit
The equipment's factory default settings

Correct answer: The measurement values recorded before any adjustments during a calibration

As-found data captures the device's performance state before any corrections, providing a historical baseline for trend analysis.

Question 26: Which of the following best describes the purpose of a 'hipot' (high potential) test on medical equipment?

Measuring ground bond resistance
Testing insulation integrity by applying high voltage between conductors and ground (Correct answer)
Verifying patient leakage current is within limits
Checking electromagnetic interference emissions

Correct answer: Testing insulation integrity by applying high voltage between conductors and ground

A hipot test applies voltage significantly above normal operating levels to verify that insulation will not break down under fault conditions.

Question 27: What is a 'test uncertainty ratio' (TUR) and why does it matter in calibration?

Ratio of the calibration standard's accuracy to the device's tolerance, should be at least 4:1 (Correct answer)
The percentage of failed calibrations
Ratio of device weight to calibrator weight
The ratio of pass to fail results

Correct answer: Ratio of the calibration standard's accuracy to the device's tolerance, should be at least 4:1

A TUR of at least 4:1 means the calibration standard is four times more accurate than the device tolerance, ensuring the calibration itself is reliable.

Question 28: Common Mode Rejection Ratio (CMRR) is a critical specification for biomedical amplifiers because it describes the amplifier's ability to:

Convert analog signals to digital values
Reject noise signals common to both inputs (Correct answer)
Increase the frequency bandwidth of the signal
Match the impedance between stages

Correct answer: Reject noise signals common to both inputs

A high CMRR means the amplifier rejects interference (such as 60 Hz noise) that appears equally on both differential inputs, preserving the small physiological signal of interest.

Question 29: What should be done first when a medical device fails during patient use?

Remove the device from service (Correct answer)
Increase power supply to the device
Ignore the malfunction and continue use
Continue using the device with adjustments

Correct answer: Remove the device from service

If a medical device fails during patient use, the immediate and most crucial step is to remove it from service to prevent potential harm to the patient or further malfunction. Continuing to use a faulty device could lead to inaccurate readings, incorrect treatments, or direct injury. The device should be clearly tagged as defective and sent for repair or replacement to ensure patient safety.

Question 30: In ISO 9001 quality management, what is the primary purpose of a corrective action?

To eliminate the root cause of a nonconformity (Correct answer)
To retrain staff on standard procedures
To prevent a potential problem from occurring
To document all identified defects

Correct answer: To eliminate the root cause of a nonconformity

Corrective action targets the root cause of an existing nonconformity to prevent its recurrence, distinguishing it from preventive action.

Certified Biomedical Equipment Technician (CBET)

The CBET, administered by AAMI, validates the knowledge and skills of biomedical equipment technicians responsible for maintaining, troubleshooting, and managing medical devices and technology in healthcare settings.

Questions

35 min

Time Limit

70%

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