Practice Test Geeks(CHT) Certified Hyperbaric Technician Practice Test
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Equipment Operation & Maintenance Flashcards

7 cards from real CHT 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. Which ASME standard governs the design, fabrication, and inspection of pressure vessels used as hyperbaric chambers in the United States?

    Answer: ASME PVHO-1

    ASME PVHO-1 (Safety Standard for Pressure Vessels for Human Occupancy) specifically addresses hyperbaric and diving chambers.

  2. A compressor used to fill a hyperbaric chamber's air banks develops an unusually high discharge temperature. The most likely cause is:

    Answer: Fouled or restricted intake filter reducing airflow

    A clogged intake filter restricts airflow, causing the compressor to work harder and generate excess heat at the discharge.

  3. What is the function of the actuator on an automatic chamber depth control system?

    Answer: Modulates the supply or exhaust valve to maintain a set pressure profile

    The actuator physically opens or closes the supply/exhaust valves in response to signals from the controller to track the prescribed depth profile.

  4. Carbon monoxide contamination in a hyperbaric chamber's compressed-air supply is MOST likely caused by:

    Answer: Compressor air intake located near an internal combustion engine exhaust

    CO enters the intake when it is sited near engine exhaust, diesel generators, or vehicle emissions; this is a critical placement and monitoring concern.

  5. When performing a pre-treatment inspection of a monoplace hyperbaric chamber, the technician should verify the acrylic viewport is free from:

    Answer: Crazing, cracks, deep scratches, and chemical solvent contact marks

    Crazing, cracks, and solvent damage compromise acrylic structural integrity under pressure and must disqualify the viewport from use until assessed.

  6. In a multiplace chamber, the purpose of the medical lock (pass-through lock) is to:

    Answer: Transfer medications, equipment, and small items to patients at pressure without decompressing the chamber

    The medical lock is a small pressure vessel that allows items to be pressurized and passed into the chamber without disrupting treatment pressure.

  7. A hyperbaric chamber's exhaust (overboard dump) line must be routed to:

    Answer: A safe outdoor location away from ignition sources, air intakes, and occupied areas

    Overboard dump lines discharge oxygen-enriched gas; routing outdoors away from ignition sources and intakes prevents fire hazard and re-contamination.