Certified Hyperbaric Technologist Test CHT Hyperbaric Physics and Gas Laws 2

Question 1

A sealed flexible bag holds 6 L of gas at the surface (1 ATA). At 3 ATA in a hyperbaric chamber, what is its approximate volume, assuming constant temperature?

Accepted Answer

2 L

Answer

6 L

Answer

12 L

Answer

18 L

Question 2

Which gas law best explains why nitrogen narcosis worsens as a diver or chamber occupant goes deeper?

Accepted Answer

Henry's Law

Answer

Charles's Law

Answer

Graham's Law

Answer

Boyle's Law

Question 3

At 2 ATA, what is the partial pressure of oxygen in air (21% O2)?

Accepted Answer

0.42 ATA

Answer

0.21 ATA

Answer

1.0 ATA

Answer

2.0 ATA

Question 4

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 product of the individual gas pressures

Answer

The pressure of the most abundant gas

Answer

The average of the individual gas pressures

Question 5

Why does a sealed rigid gas cylinder show increased pressure when moved from a cold storage room into a warm chamber?

Accepted Answer

Gay-Lussac's Law

Answer

Boyle's Law

Answer

Henry's Law

Answer

Graham's Law

Question 6

Approximately how much does ambient pressure increase for every 33 feet of seawater depth?

Accepted Answer

1 ATA

Answer

0.5 ATA

Answer

2 ATA

Answer

3 ATA

Question 7

A patient breathing 100% oxygen at 2.4 ATA receives an inspired oxygen partial pressure of approximately what?

Accepted Answer

2.4 ATA

Answer

0.24 ATA

Answer

1.0 ATA

Answer

4.8 ATA