Practice Test Geeks(CABT) Certified Associate in Biomedical Technology Practice Test
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Biomedical Equipment Technology & Function Flashcards

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

Read the first 7 Biomedical Equipment Technology & Function flashcards as text

  1. When testing ground wire integrity on patient care equipment, the AAMI ES1 standard specifies a maximum resistance of:

    Answer: 0.1 ohm

    AAMI ES1 requires that the resistance from the grounding pin to any exposed conductive patient-contact surface not exceed 0.1 ohm to ensure effective fault current dissipation.

  2. A neonatal incubator's airflow system is designed to maintain what primary environmental parameter for the infant?

    Answer: Neutral thermal environment by controlling air temperature

    The incubator's primary function is to maintain a neutral thermal environment (NTE) that minimizes the infant's metabolic oxygen consumption and heat loss.

  3. In a hemodialysis machine, the conductivity monitor of the dialysate circuit is critical because it detects:

    Answer: Incorrect electrolyte concentration that could cause patient harm

    Conductivity correlates directly with dissolved electrolyte (sodium) concentration; a conductivity alarm stops dialysate delivery to prevent hypo- or hypernatremia.

  4. The purpose of a thermal compensation resistor (or thermistor) in a pressure transducer is to:

    Answer: Correct for sensitivity drift caused by temperature changes

    Strain-gauge pressure transducers are temperature-sensitive; a thermistor or compensation resistor adjusts the bridge output to maintain accuracy across a range of operating temperatures.

  5. Which FDA device classification requires the most rigorous pre-market approval (PMA) process, typically applied to life-sustaining or life-supporting devices?

    Answer: Class III

    FDA Class III devices (e.g., implantable pacemakers, ventricular assist devices) pose the greatest risk and require PMA with clinical evidence of safety and effectiveness.

  6. A hospital's medical gas alarm panel shows a 'low pressure' warning for the piped oxygen system. The FIRST action a BMET should take is:

    Answer: Verify the alarm by checking the zone valve pressure gauge and contacting the facility engineer

    Confirming the alarm with a gauge reading and notifying facilities engineering ensures the response is appropriate and that clinical staff take corrective action if a true emergency exists.

  7. Electromagnetic interference (EMI) from a nearby electrosurgical unit most commonly affects which monitoring device by inducing artifact that mimics the signal of interest?

    Answer: ECG rhythm display

    ESU RF energy couples into ECG lead wires, which act as antennas, producing artifact that obscures the cardiac signal during electrosurgical activation.