Certified Hyperbaric Technologist Test CHT Hyperbaric Equipment and Operations 2

Question 1

What is the maximum allowable oxygen concentration inside a Class A (multiplace) hyperbaric chamber atmosphere to minimize fire risk?

Accepted Answer

23.5%

Answer

Multiplace chamber oxygen should be kept at or below 23.5% to reduce the risk of fire.

Question 2

In a monoplace chamber pressurized with 100% oxygen, how does the patient typically receive their treatment gas?

Accepted Answer

By breathing the chamber atmosphere directly

Answer

In a monoplace oxygen chamber the patient breathes the surrounding 100% oxygen atmosphere directly.

Question 3

What is the primary purpose of a built-in breathing system (BIBS) in a multiplace chamber?

Accepted Answer

Deliver 100% oxygen to the patient while the chamber is air-pressurized

Answer

BIBS masks deliver treatment oxygen to patients while the multiplace chamber itself remains pressurized with air.

Question 4

During chamber pressurization, the increase in temperature inside the chamber is caused by which gas law principle?

Accepted Answer

Adiabatic compression heating

Answer

Compressing the gas rapidly releases heat through adiabatic compression, raising chamber temperature.

Question 5

Which fire-suppression feature is required in most multiplace hyperbaric chambers?

Accepted Answer

A deluge water spray system

Answer

Multiplace chambers are equipped with a deluge water spray system for rapid fire suppression.

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