CHT Hyperbaric Equipment and Operations 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 Hyperbaric Equipment and Operations flashcards as text
What is the maximum allowable oxygen concentration inside a Class A (multiplace) hyperbaric chamber atmosphere to minimize fire risk?
Answer: 23.5%
Multiplace chamber oxygen should be kept at or below 23.5% to reduce the risk of fire.
In a monoplace chamber pressurized with 100% oxygen, how does the patient typically receive their treatment gas?
Answer: By breathing the chamber atmosphere directly
In a monoplace oxygen chamber the patient breathes the surrounding 100% oxygen atmosphere directly.
What is the primary purpose of a built-in breathing system (BIBS) in a multiplace chamber?
Answer: Deliver 100% oxygen to the patient while the chamber is air-pressurized
BIBS masks deliver treatment oxygen to patients while the multiplace chamber itself remains pressurized with air.
During chamber pressurization, the increase in temperature inside the chamber is caused by which gas law principle?
Answer: Adiabatic compression heating
Compressing the gas rapidly releases heat through adiabatic compression, raising chamber temperature.
Which fire-suppression feature is required in most multiplace hyperbaric chambers?
Answer: A deluge water spray system
Multiplace chambers are equipped with a deluge water spray system for rapid fire suppression.
What does the term 'sea level equivalent' refer to during a hyperbaric treatment?
Answer: A reference depth/pressure used to express treatment depth
Treatment pressures are commonly expressed as a depth equivalent referenced to sea level.
Why must petroleum-based products be prohibited inside an oxygen-rich monoplace chamber?
Answer: They are highly flammable in elevated oxygen
Petroleum products ignite readily in oxygen-enriched atmospheres, creating a fire hazard.
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