CHT Fire Safety and Oxygen Hazards in Hyperbaric Environments Flashcards
7 cards from real Certified Hyperbaric Technologist Test practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 CHT Fire Safety and Oxygen Hazards in Hyperbaric Environments flashcards as text
At what minimum oxygen concentration does a hyperbaric environment become significantly more hazardous for fire risk?
Answer: 23.5%
NFPA 99 designates 23.5% as the threshold above which an oxygen-enriched atmosphere exists, substantially increasing flammability of materials.
What clothing material is required for patients entering a hyperbaric chamber?
Answer: 100% cotton
100% cotton is required because synthetic fabrics can generate static electricity and are more flammable in oxygen-enriched atmospheres.
If a fire ignites inside a monoplace hyperbaric chamber during a treatment, what is the FIRST priority action?
Answer: Begin immediate emergency decompression
Immediate emergency decompression is the first priority to rapidly reduce the oxygen-enriched atmosphere and allow the patient to exit the chamber.
How does the rate of fire spread in a hyperbaric oxygen environment compare to normal atmospheric air?
Answer: Faster due to enhanced oxidation at elevated partial pressures
Elevated oxygen partial pressures accelerate oxidation, causing fires to spread significantly faster than in normal atmospheric air.
Static electricity buildup in hyperbaric chambers can best be reduced by:
Answer: Grounding the patient and chamber to a common reference point
Proper grounding of the patient and chamber to a common electrical reference dissipates static charge before it can create an ignition spark.
Which of the following is considered a potential ignition source inside a hyperbaric chamber?
Answer: Static electrical discharge
Static electrical discharge can produce sparks capable of igniting flammable materials or gases in an oxygen-enriched hyperbaric atmosphere.
Why are petroleum-based products strictly prohibited inside hyperbaric chambers?
Answer: They are highly flammable in oxygen-enriched environments
Petroleum-based products are highly flammable and their ignition risk increases dramatically in the oxygen-enriched atmosphere of a hyperbaric chamber.
How this page was made: written with AI tools and published by Nathan Beja, founder of Practice Test Geeks, who is responsible for its content. Exam facts are checked against the official sources listed below. Not reviewed by a subject-matter expert. Editorial policy
Sources & references
Exam facts on this page (fees, format, dates, passing scores) are checked against these official sources; the date is our last check. Editorial policy
- nbdhmt.org — Renewal, eligibility, exam format, passing score, retake policy, score validity, fees, retake fee, test delivery, registration deadline · verified Oct 2026