Certified Hyperbaric Technologist Test Hyperbaric Physics Fundamentals 5

Question 1

Archimedes' principle, relevant to chamber operations, describes which phenomenon?

Accepted Answer

Buoyant force equal to weight of displaced fluid

Answer

Archimedes' principle states a submerged object experiences buoyant force equal to the displaced fluid's weight.

Question 2

As ambient pressure increases, what happens to the density of breathing gas?

Accepted Answer

Density increases

Answer

Higher pressure packs gas molecules closer together, increasing gas density.

Question 3

Increased breathing gas density at depth primarily increases what for the patient?

Accepted Answer

Work of breathing (airway resistance)

Answer

Denser gas raises airway resistance, increasing the work of breathing at pressure.

Question 4

Which property explains why sound travels faster inside a pressurized chamber atmosphere?

Accepted Answer

Increased gas density and molecular interaction

Answer

Denser pressurized gas transmits sound waves faster than gas at surface pressure.

Question 5

What is the absolute pressure at 66 feet of seawater?

Accepted Answer

3 ATA

Answer

66 feet adds 2 atmospheres of water plus 1 atmosphere at surface, equaling 3 ATA.

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