CHT Equipment Operation & Maintenance 3

Question 1

Which ASME standard governs the design, fabrication, and inspection of pressure vessels used as hyperbaric chambers in the United States?

Accepted Answer

ASME PVHO-1

Answer

ASME PVHO-1 (Safety Standard for Pressure Vessels for Human Occupancy) specifically addresses hyperbaric and diving chambers.

Question 2

A compressor used to fill a hyperbaric chamber's air banks develops an unusually high discharge temperature. The most likely cause is:

Accepted Answer

Fouled or restricted intake filter reducing airflow

Answer

A clogged intake filter restricts airflow, causing the compressor to work harder and generate excess heat at the discharge.

Question 3

What is the function of the actuator on an automatic chamber depth control system?

Accepted Answer

Modulates the supply or exhaust valve to maintain a set pressure profile

Answer

The actuator physically opens or closes the supply/exhaust valves in response to signals from the controller to track the prescribed depth profile.

Question 4

Carbon monoxide contamination in a hyperbaric chamber's compressed-air supply is MOST likely caused by:

Accepted Answer

Compressor air intake located near an internal combustion engine exhaust

Answer

CO enters the intake when it is sited near engine exhaust, diesel generators, or vehicle emissions; this is a critical placement and monitoring concern.

Question 5

When performing a pre-treatment inspection of a monoplace hyperbaric chamber, the technician should verify the acrylic viewport is free from:

Accepted Answer

Crazing, cracks, deep scratches, and chemical solvent contact marks

Answer

Crazing, cracks, and solvent damage compromise acrylic structural integrity under pressure and must disqualify the viewport from use until assessed.

(CHT) Certified Hyperbaric Technician Practice Test

(CHT) Certified Hyperbaric Technician Practice Test

CHT Equipment Operation & Maintenance 3