RMGA Pipeline Installation 3 — Questions and Answers
Question 1: Which standard governs the installation of medical gas and vacuum piping systems in healthcare facilities in the United States?
- NFPA 55
- NFPA 99 (Correct answer)
- NFPA 101
- NFPA 13
Correct answer: NFPA 99
NFPA 99, Health Care Facilities Code, is the primary standard governing medical gas and vacuum pipeline installation.
Question 2: Medical gas pipeline installers must be certified by which organization under NFPA 99 requirements?
- ASSE International (ASSE 6010) (Correct answer)
- The Joint Commission
- OSHA
- American Welding Society
Correct answer: ASSE International (ASSE 6010)
NFPA 99 requires that medical gas pipeline installers be qualified under ASSE 6010 Professional Qualifications Standard.
Question 3: When routing medical gas piping through a fire-rated wall, what is required?
- The pipe must be wrapped with fiberglass insulation
- A listed firestop system must be installed at the penetration (Correct answer)
- The pipe must be reduced in size at the penetration
- A union fitting must be installed on each side of the wall
Correct answer: A listed firestop system must be installed at the penetration
All penetrations of fire-rated assemblies by medical gas piping must be sealed with a listed and labeled firestop system to maintain the fire rating.
Question 4: In medical gas pipeline systems, what does the term 'source equipment' refer to?
- Patient outlet stations and terminal units
- Central supply systems including bulk storage and manifolds (Correct answer)
- Zone valve boxes and area alarms
- Pressure regulators at the point of use
Correct answer: Central supply systems including bulk storage and manifolds
Source equipment includes the central supply systems (bulk liquid storage, cylinder manifolds, compressors, and vacuum pumps) that generate or supply the medical gases.
Question 5: What is the correct brazed joint clearance (gap) between the tube and fitting socket for medical gas piping?
- 0.000–0.002 inches
- 0.001–0.010 inches (Correct answer)
- 0.010–0.020 inches
- 0.020–0.030 inches
Correct answer: 0.001–0.010 inches
Proper capillary action for brazing requires a joint clearance of 0.001 to 0.010 inches between the tube and fitting socket.
Question 6: Which of the following gases is classified as a medical support gas rather than a medical gas under NFPA 99?
- Oxygen
- Nitrous oxide
- Nitrogen (instrument air substitute) (Correct answer)
- Medical air
Correct answer: Nitrogen (instrument air substitute)
Nitrogen used as an instrument gas (for powering surgical tools) is classified as a medical support gas, not a gas for patient respiration.
Question 7: What minimum distance must medical gas piping be separated from electrical conduit when running parallel in the same space?
- 1 inch (Correct answer)
- 2 inches
- 6 inches
- 12 inches
Correct answer: 1 inch
NFPA 99 requires at least 1 inch of separation between medical gas piping and electrical conduit or wiring when running parallel.
RMGA Pipeline Installation 3
Which standard governs the installation of medical gas and vacuum piping systems in healthcare facilities in the United States?