Practice Test GeeksCBET - Certified Biomedical Equipment Technician Practice Test
← All CBET Flashcard Decks

Healthcare Technology Problem-Solving Flashcards

7 cards from real CBET practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 Healthcare Technology Problem-Solving flashcards as text

  1. A ventilator's tidal volume display reads 500 mL but a calibrated test lung measurement shows only 420 mL. What is the most likely cause?

    Answer: Flow sensor calibration drift

    Flow sensor drift is the most common cause of tidal volume display inaccuracy when the set and delivered volumes differ consistently.

  2. A nurse reports that a patient's SpO2 monitor reads 98% while the patient appears cyanotic. Which troubleshooting step should be performed first?

    Answer: Check probe placement and peripheral perfusion

    Poor perfusion or improper probe placement are the most common causes of falsely high SpO2 readings before escalating to hardware replacement.

  3. An infusion pump alarms 'upstream occlusion' but the tubing appears clear. What should the BMET check next?

    Answer: Closed roller clamp or kinked tubing upstream of the pump

    A closed clamp or subtle kink upstream of the pump head is the most frequent cause of upstream occlusion alarms when visible tubing appears unobstructed.

  4. During a preventive maintenance inspection, an electrosurgical unit's leakage current measures 450 µA chassis to ground. What action is required?

    Answer: Remove from service; leakage exceeds the 300 µA limit for ESUs

    NFPA 99 and AAMI ES60601-1 limit chassis leakage current to 300 µA for patient-care equipment; 450 µA requires the unit be taken out of service.

  5. A defibrillator delivers only 150 J when set to 200 J during an output verification test. After replacing the energy storage capacitor the problem persists. What should be investigated next?

    Answer: Charging circuit and charge relay

    If the capacitor is confirmed good, the charging circuit or charge relay is the next most likely cause of low delivered energy.

  6. A hospital bed's weight scale consistently reads 5 kg below the known weight of a calibration mass. Which corrective action is most appropriate?

    Answer: Perform a span calibration adjustment using NIST-traceable weights

    A consistent offset (span error) is corrected through span calibration using traceable reference weights, not by replacing hardware first.

  7. A patient monitor's ECG trace shows excessive 60 Hz artifact despite proper lead placement. After checking lead connections, what is the next troubleshooting step?

    Answer: Verify patient ground electrode contact and integrity

    Poor or absent ground (RL/right-leg drive) electrode contact is the most common cause of persistent 60 Hz powerline interference on ECG.