Certified Hyperbaric Technologist Test CHT Hyperbaric Physics and Gas Laws 5

Question 1

A balloon holds 10 L at 4 ATA. As it ascends to 1 ATA at constant temperature, what is the final volume?

Accepted Answer

40 L

Answer

2.5 L

Answer

10 L

Answer

20 L

Question 2

Which combined relationship is expressed by the general gas law equation P1V1/T1 = P2V2/T2?

Accepted Answer

Boyle's, Charles's, and Gay-Lussac's Laws combined

Answer

Henry's and Graham's Laws

Answer

Dalton's and Henry's Laws

Answer

Only Boyle's Law

Question 3

Oxygen toxicity risk in hyperbaric therapy is driven primarily by which factor?

Accepted Answer

Inspired oxygen partial pressure and exposure time

Answer

Total chamber volume

Answer

Nitrogen molecular weight

Answer

Ambient temperature

Question 4

If chamber gas is 79% nitrogen at 3 ATA, what is the nitrogen partial pressure?

Accepted Answer

2.37 ATA

Answer

0.79 ATA

Answer

1.58 ATA

Answer

3.0 ATA

Question 5

Why can a sealed IV bag, syringe, or air-filled cuff malfunction during chamber compression?

Accepted Answer

Boyle's Law compresses trapped air, changing the device's behavior

Answer

Henry's Law dissolves the plastic

Answer

Charles's Law freezes the fluid

Answer

Graham's Law evaporates the contents

Question 6

Water vapor pressure in the alveoli (about 47 mmHg at body temperature) must be subtracted when calculating what?

Accepted Answer

Inspired or alveolar gas partial pressures

Answer

Total chamber pressure

Answer

Gauge pressure

Answer

Gas molecular weight

Question 7

As absolute pressure increases, the density of a breathing gas does what?

Accepted Answer

Increases proportionally

Answer

Decreases proportionally

Answer

Stays constant

Answer

Becomes zero