CHS Hyperbaric Equipment Operation & Safety 4

Question 1

Which gas is used to pressurize a multiplace hyperbaric chamber to minimize fire risk compared to using oxygen alone?

Accepted Answer

Medical-grade compressed air

Answer

Medical-grade compressed air (approximately 21% O2 / 79% N2) is used to pressurize multiplace chambers so patients breathe 100% O2 via masks or hoods, keeping the ambient atmosphere non-flammable.

Question 2

What is the function of a through-hull penetration fitting in a hyperbaric chamber?

Accepted Answer

Allows electrical cables or medical lines to pass through the chamber wall while maintaining pressure integrity

Answer

Through-hull fittings are pressure-rated, sealed penetrations that allow electrical, gas, or monitoring lines to pass through the vessel wall without compromising the pressure boundary.

Question 3

A fire breaks out inside an occupied monoplace hyperbaric chamber. The operator's FIRST action must be to:

Accepted Answer

Begin emergency decompression immediately while activating the fire suppression system

Answer

Emergency decompression must begin immediately to remove the high-oxygen environment and allow safe evacuation; opening the door without decompression would cause fatal barotrauma.

Question 4

When inspecting a hyperbaric chamber viewport (acrylic window), which finding requires the chamber to be taken out of service immediately?

Accepted Answer

A crazing crack or deep scratch that penetrates the acrylic material

Answer

Crazing or deep scratches in acrylic viewports indicate structural compromise; such viewports can fail catastrophically under pressure and must be replaced before use.

Question 5

The primary reason for maintaining a minimum separation distance between hyperbaric chambers and ignition sources is to:

Accepted Answer

Prevent oxygen-enriched exhaust gases from contacting sparks or open flames

Answer

Hyperbaric chambers vent oxygen-enriched exhaust that can create a flammable atmosphere near the chamber, making separation from ignition sources essential.

(CHS) Certified Hyperbaric Specialist Practice Test

(CHS) Certified Hyperbaric Specialist Practice Test

CHS Hyperbaric Equipment Operation & Safety 4