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

By Boyle's Law, V2 = (4 x 10)/1 = 40 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

The combined gas law unifies Boyle's, Charles's, and Gay-Lussac's relationships into one equation.

Question 3

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

Accepted Answer

Inspired oxygen partial pressure and exposure time

Answer

Oxygen toxicity depends on the oxygen partial pressure and duration of exposure, not the percentage alone.

Question 4

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

Accepted Answer

2.37 ATA

Answer

PN2 = 0.79 x 3 = 2.37 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

Trapped air volumes shrink under compression per Boyle's Law, which can collapse or alter sealed devices.

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