Practice Test GeeksCBET - Certified Biomedical Equipment Technician Practice Test
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Medical Gas Systems 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 Medical Gas Systems flashcards as text

  1. A hospital's master alarm panel shows a 'Source Valve Closed' alarm for the surgical vacuum system. What is the FIRST corrective action?

    Answer: Locate and open the source shutoff valve

    The first corrective action is to locate and open the closed source shutoff valve to restore vacuum service, then investigate the cause of the unexpected closure.

  2. What minimum purity level is required for medical-grade oxygen supplied by bulk cryogenic systems in the US?

    Answer: 99%

    USP medical oxygen requires a minimum purity of 99.0% oxygen by volume when supplied from bulk cryogenic or cylinder sources.

  3. Which type of medical gas outlet connector system uses non-interchangeable, gas-specific body configurations to prevent misconnections?

    Answer: Both DISS and NIST

    Both DISS and NIST systems use gas-specific, non-interchangeable connector geometries for wall outlets and low-pressure hose connections to prevent misconnections.

  4. During routine PM on a medical gas manifold, a technician finds a pressure gauge reading 10% lower than the adjacent calibrated reference gauge. What is the appropriate action?

    Answer: Recalibrate or replace the gauge and document the finding

    A gauge reading 10% low should be recalibrated or replaced per NFPA 99 maintenance requirements, and the discrepancy documented for corrective action tracking.

  5. What is the purpose of a pressure/vacuum indicator (PVI) installed in a medical gas zone?

    Answer: Provide local visual indication of line pressure without requiring tools

    A PVI (also called a pressure indicator) provides a local visual readout of zone line pressure so clinical staff can quickly assess system status without test equipment.

  6. Which regulatory body classifies medical gas systems components as medical devices subject to 510(k) or PMA review?

    Answer: FDA

    The FDA classifies medical gas equipment (regulators, flowmeters, outlets) as medical devices and requires 510(k) clearance or PMA approval before marketing.

  7. A technician notices ice formation on the exterior of a liquid oxygen supply line during normal operation. What does this most likely indicate?

    Answer: Normal condensation and freezing due to cryogenic temperatures

    Ice forming on liquid oxygen lines is expected because LOX at −183°C causes atmospheric moisture to condense and freeze on uninsulated pipe surfaces.