RMGA Pipeline Installation 4

Question 1

During initial pressure testing of a new medical gas pipeline system, what gas must be used for the standing pressure test?

Accepted Answer

Oil-free dry nitrogen

Answer

Oil-free dry nitrogen must be used for pressure testing medical gas pipelines to avoid introducing combustion risk, moisture, or contamination.

Question 2

What is the required initial pressure for the high-pressure standing test on a new medical gas distribution system per NFPA 99?

Accepted Answer

150 psi

Answer

The high-pressure standing test requires the system to hold 150 psi with nitrogen for a defined period without measurable pressure loss.

Question 3

Cross-connection testing between different medical gas systems is required to verify which condition?

Accepted Answer

That each outlet delivers the correct gas identity

Answer

Cross-connection testing confirms that each outlet is connected to the correct gas source and no mixing of gas species has occurred during installation.

Question 4

Medical gas piping must be labeled at maximum intervals of how many feet in accessible spaces per NFPA 99?

Accepted Answer

20 feet

Answer

NFPA 99 requires medical gas piping to be labeled with the gas name and direction of flow at intervals not exceeding 20 feet in accessible areas.

Question 5

Which of the following is the correct method for joining copper tubing sections in a medical gas pipeline?

Accepted Answer

Brazing with BAg-series filler metal and appropriate flux

Answer

Medical gas copper piping is joined by brazing using BAg (silver-based) alloys with compatible flux, which produces joints rated for high-purity gas service.

(RMGA) Registered Medical Gas Administrator Certification Practice Test

(RMGA) Registered Medical Gas Administrator Certification Practice Test

RMGA Pipeline Installation 4