CBET Medical Gas Systems

Question 1

What color is the standard pipeline and cylinder coding for medical oxygen in the United States?

Accepted Answer

Green

Answer

In the US, medical oxygen is color-coded green per CGA standards.

Question 2

What is the purpose of a zone valve in a medical gas pipeline system?

Accepted Answer

To allow isolation of gas supply to a specific area for maintenance or emergencies without affecting the entire facility

Answer

Zone valves allow specific sections to be shut off without interrupting supply to the rest of the facility.

Question 3

What safety system prevents connecting a medical gas cylinder to the wrong yoke or regulator?

Accepted Answer

Pin Index Safety System (PISS)

Answer

PISS uses specific pin positions on the cylinder valve that correspond to holes on the yoke, mechanically preventing wrong gas connection.

Question 4

What does a medical gas alarm panel monitor and how should alarms be responded to?

Accepted Answer

Pipeline pressure, reserve supply status, and system conditions, requiring immediate investigation

Answer

Medical gas alarm panels monitor pipeline pressures, reserve supply status, and operating conditions.

Question 5

What is the standard operating pressure for medical gas pipeline systems (oxygen, air, nitrous oxide) in a US hospital?

Accepted Answer

50 psi

Answer

Standard medical gas pipeline operating pressure is 50 psi per NFPA 99.

CBET - Certified Biomedical Equipment Technician Practice Test