Certified Hyperbaric Technologist Test CHT Hyperbaric Physics and Gas Laws 3

Question 1

Graham's Law of diffusion states that the rate of gas diffusion is inversely proportional to what?

Accepted Answer

The square root of its molecular weight

Answer

The gas temperature

Answer

Its partial pressure

Answer

Its solubility coefficient

Question 2

Why does a middle-ear squeeze most commonly occur during chamber compression (descent)?

Accepted Answer

Gas in the middle ear is compressed, creating a relative vacuum

Answer

Gas in the middle ear expands

Answer

Oxygen dissolves into the eardrum

Answer

Temperature drops in the ear canal

Question 3

Which gas law explains decompression sickness when bubbles form during ascent?

Accepted Answer

Henry's Law

Answer

Charles's Law

Answer

Dalton's Law

Answer

Gay-Lussac's Law

Question 4

A gas occupies 4 L at 1 ATA. At what pressure will it occupy 1 L at constant temperature?

Accepted Answer

4 ATA

Answer

2 ATA

Answer

3 ATA

Answer

8 ATA

Question 5

What term describes the actual pressure exerted by a single gas within a mixture?

Accepted Answer

Partial pressure

Answer

Absolute pressure

Answer

Gauge pressure

Answer

Vapor pressure

Question 6

Charles's Law describes the relationship between which two variables at constant pressure?

Accepted Answer

Volume and temperature

Answer

Pressure and volume

Answer

Pressure and temperature

Answer

Solubility and pressure

Question 7

One atmosphere absolute (1 ATA) is approximately equal to how many millimeters of mercury?

Accepted Answer

760 mmHg

Answer

260 mmHg

Answer

500 mmHg

Answer

1013 mmHg