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

30%

Answer

21%

Answer

50%

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

Through a tight-fitting aviator mask

Answer

Via a built-in breathing system (BIBS) hood

Answer

Through an endotracheal tube only

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

Provide emergency lighting

Answer

Equalize ear pressure automatically

Answer

Cool the chamber atmosphere

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

Boyle's law expansion

Answer

Henry's law dissolution

Answer

Dalton's partial pressures

Question 5

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

Accepted Answer

A deluge water spray system

Answer

A dry-chemical extinguisher only

Answer

A CO2 flooding system

Answer

No system is required

Question 6

What does the term 'sea level equivalent' refer to during a hyperbaric treatment?

Accepted Answer

A reference depth/pressure used to express treatment depth

Answer

The chamber's altitude rating

Answer

The maximum patient weight

Answer

The oxygen flow rate

Question 7

Why must petroleum-based products be prohibited inside an oxygen-rich monoplace chamber?

Accepted Answer

They are highly flammable in elevated oxygen

Answer

They damage the acrylic shell

Answer

They interfere with intercom signals

Answer

They raise the patient's blood pressure