Hyperbaric Physics Fundamentals 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 Hyperbaric Physics Fundamentals flashcards as text
Archimedes' principle, relevant to chamber operations, describes which phenomenon?
Answer: Buoyant force equal to weight of displaced fluid
Archimedes' principle states a submerged object experiences buoyant force equal to the displaced fluid's weight.
As ambient pressure increases, what happens to the density of breathing gas?
Answer: Density increases
Higher pressure packs gas molecules closer together, increasing gas density.
Increased breathing gas density at depth primarily increases what for the patient?
Answer: Work of breathing (airway resistance)
Denser gas raises airway resistance, increasing the work of breathing at pressure.
Which property explains why sound travels faster inside a pressurized chamber atmosphere?
Answer: Increased gas density and molecular interaction
Denser pressurized gas transmits sound waves faster than gas at surface pressure.
What is the absolute pressure at 66 feet of seawater?
Answer: 3 ATA
66 feet adds 2 atmospheres of water plus 1 atmosphere at surface, equaling 3 ATA.
A monoplace chamber is typically pressurized with which gas?
Answer: 100% oxygen
Monoplace chambers are commonly pressurized with 100% oxygen for single-patient treatment.
Why must compression and decompression rates be controlled rather than rapid?
Answer: To allow pressure equalization and prevent barotrauma
Controlled rates allow body air spaces to equalize, preventing barotrauma to ears and sinuses.
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