RMGA System Testing 2

Question 1

What is the minimum pressure used during a high-pressure leak test of a medical gas pipeline system per NFPA 99?

Accepted Answer

150 psig

Answer

NFPA 99 requires a high-pressure leak test at 150 psig (or 20% above the system's maximum operating pressure) for medical gas pipelines.

Question 2

During a cross-connection test, all zone valve boxes are closed and a test gas is introduced. What should the reading be at each outlet if the system is free of cross-connections?

Accepted Answer

Zero pressure at every outlet in the zone being tested

Answer

With zone valves closed, pressure should be zero at all outlets in the isolated zone if there are no cross-connections feeding gas from another source.

Question 3

Which gas is typically used to perform the initial pressure test of a newly installed medical gas pipeline before purging?

Accepted Answer

Nitrogen

Answer

Dry nitrogen (or oil-free dry air) is used for initial pressure testing because it is inert, non-flammable, and avoids introducing combustion-supporting gas into an untested system.

Question 4

When conducting a standing pressure test on a medical gas system, how long must pressure be maintained without loss to pass?

Accepted Answer

24 hours

Answer

NFPA 99 requires the standing pressure test to be maintained for a minimum of 24 hours without pressure loss to confirm the integrity of the piping system.

Question 5

What does a positive result on an odor test during medical gas system verification indicate?

Accepted Answer

Contamination is present in the pipeline

Answer

An unusual odor detected during outlet testing indicates contamination such as oil, solvent, or purge gas residue still present in the pipeline.

(RMGA) Registered Medical Gas Administrator Certification Practice Test

(RMGA) Registered Medical Gas Administrator Certification Practice Test

RMGA System Testing 2