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

Gas solubility in liquids

Answer

Heat transfer rate

Answer

Light refraction

Question 2

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

Accepted Answer

Density increases

Answer

Density decreases

Answer

Density stays constant

Answer

Density becomes zero

Question 3

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

Accepted Answer

Work of breathing (airway resistance)

Answer

Visual clarity

Answer

Oxygen solubility limit

Answer

Body temperature

Question 4

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

Accepted Answer

Increased gas density and molecular interaction

Answer

Lower temperature

Answer

Reduced oxygen

Answer

Higher humidity only

Question 5

What is the absolute pressure at 66 feet of seawater?

Accepted Answer

3 ATA

Answer

2 ATA

Answer

4 ATA

Answer

5 ATA

Question 6

A monoplace chamber is typically pressurized with which gas?

Accepted Answer

100% oxygen

Answer

Compressed air

Answer

Heliox

Answer

Nitrox 50

Question 7

Why must compression and decompression rates be controlled rather than rapid?

Accepted Answer

To allow pressure equalization and prevent barotrauma

Answer

To save oxygen supply

Answer

To reduce electricity use

Answer

To keep the chamber clean