Practice Test GeeksCBET - Certified Biomedical Equipment Technician Practice Test
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General Practice 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.

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  1. A hospital's isolated power system (IPS) is designed primarily to protect against:

    Answer: Macroshock from single-fault ground currents in wet locations

    An IPS isolates the patient care circuit from ground so a single fault does not create a complete circuit for dangerous ground currents (macroshock).

  2. When testing a line isolation monitor (LIM), the alarm should activate when the hazard current exceeds:

    Answer: 5 mA

    NFPA 99 requires the LIM alarm to activate when total hazard current reaches 5 mA, indicating the IPS isolation has degraded to a dangerous level.

  3. A technician notices the hospital's oxygen wall outlet delivers flow but at a lower pressure than specification. The MOST likely cause is:

    Answer: Excessive demand from too many simultaneous users on that zone

    Excessive simultaneous demand on a piped medical gas zone creates a pressure drop due to flow resistance in the supply piping.

  4. In a digital-to-analog converter (DAC) used in medical equipment, increasing the bit resolution from 8-bit to 12-bit:

    Answer: Increases the number of discrete output levels from 256 to 4,096

    An 8-bit DAC produces 2^8 = 256 levels while a 12-bit DAC produces 2^12 = 4,096 levels, providing finer output resolution.

  5. A technician is performing annual PM on a hospital bed. Which safety check is MOST critical for patient fall prevention?

    Answer: Testing siderail locking mechanisms for secure engagement

    Siderail locking mechanism failure is directly linked to patient falls, making it the highest-priority safety check during hospital bed PM.

  6. The International System of Units (SI) base unit for electric current is the:

    Answer: Ampere

    The ampere (A) is the SI base unit for electric current, defined as the flow of electric charge past a point per unit time.

  7. A biomedical technician must ensure an ECG machine's patient lead leakage current does not exceed which limit for a CF-type device per IEC 60601-1?

    Answer: 10 µA under normal conditions

    For CF (cardiac floating) applied parts, IEC 60601-1 limits patient leakage current to 10 µA under normal conditions due to direct cardiac risk.