Certified Hyperbaric Technologist Test Hyperbaric Physics Fundamentals 3

Question 1

Henry's Law describes which physical phenomenon relevant to hyperbaric therapy?

Accepted Answer

Amount of gas dissolved in a liquid is proportional to its partial pressure

Answer

Gas volume changes with temperature

Answer

Light refraction in water

Answer

Heat transfer in gases

Question 2

Increased dissolved oxygen in plasma during HBOT is best explained by which law?

Accepted Answer

Henry's Law

Answer

Boyle's Law

Answer

Charles's Law

Answer

Newton's Law

Question 3

Dalton's Law of partial pressures states that the total pressure of a gas mixture equals what?

Accepted Answer

The sum of the partial pressures of each gas

Answer

The pressure of the heaviest gas

Answer

The average of all gas pressures

Answer

The product of the gas concentrations

Question 4

In air (21% oxygen) at 3 ATA, what is the approximate partial pressure of oxygen?

Accepted Answer

0.63 ATA

Answer

0.21 ATA

Answer

1.0 ATA

Answer

3.0 ATA

Question 5

Why does the risk of oxygen toxicity increase as treatment pressure rises?

Accepted Answer

The partial pressure of oxygen increases per Dalton's Law

Answer

Oxygen molecules become heavier

Answer

Temperature decreases

Answer

Nitrogen is removed

Question 6

When a diver breathes compressed air at depth, which gas primarily dissolves into body tissues and causes decompression sickness risk?

Accepted Answer

Nitrogen

Answer

Oxygen

Answer

Carbon dioxide

Answer

Helium

Question 7

What is the partial pressure of oxygen when breathing 100% oxygen at 2.4 ATA?

Accepted Answer

2.4 ATA

Answer

1.0 ATA

Answer

0.21 ATA

Answer

4.8 ATA