CHT CHT Physics & Gas Laws in Hyperbaric Medicine

Question 1

According to Boyle's Law, if pressure in a hyperbaric chamber doubles, the volume of a trapped gas will:

Accepted Answer

Halve

Answer

Boyle's Law states that at constant temperature, pressure and volume are inversely proportional, so doubling pressure halves the gas volume.

Question 2

At 2 ATA breathing 100% oxygen, the partial pressure of oxygen is approximately:

Accepted Answer

1520 mmHg

Answer

At 2 ATA, PO2 = 2 × 760 mmHg = 1520 mmHg, since partial pressure scales directly with absolute pressure.

Question 3

Henry's Law is most relevant in hyperbaric medicine because it explains:

Accepted Answer

Why more oxygen dissolves in blood at higher pressures

Answer

Henry's Law states that the amount of gas dissolved in a liquid is proportional to its partial pressure, explaining increased plasma oxygen dissolution during HBOT.

Question 4

Dalton's Law of Partial Pressures states that:

Accepted Answer

Total pressure equals the sum of partial pressures of each component gas

Answer

Dalton's Law states that the total pressure of a gas mixture equals the sum of the individual partial pressures of each component gas.

Question 5

One atmosphere absolute (1 ATA) is equivalent to approximately:

Accepted Answer

14.7 psi

Answer

1 ATA equals approximately 14.7 psi (pounds per square inch), which is standard sea-level atmospheric pressure.

(CHT) Certified Hyperbaric Technician Practice Test

(CHT) Certified Hyperbaric Technician Practice Test

CHT CHT Physics & Gas Laws in Hyperbaric Medicine