RMGA Safety Standards 2 — Questions and Answers
Question 1: According to NFPA 99, what is the minimum required pressure for a Level 1 medical gas alarm to activate in a zone valve box area?
- 10% above or below normal operating pressure (Correct answer)
- 5% above or below normal operating pressure
- 20% above or below normal operating pressure
- 15% above or below normal operating pressure
Correct answer: 10% above or below normal operating pressure
NFPA 99 requires Level 1 medical gas alarms to activate when pressure deviates 10% above or below the normal operating pressure.
Question 2: Which document establishes the installation requirements for nonflammable medical gas and vacuum piping systems in healthcare facilities?
- OSHA 29 CFR 1910
- NFPA 99 Health Care Facilities Code (Correct answer)
- CGA G-4 Oxygen
- ANSI Z87.1
Correct answer: NFPA 99 Health Care Facilities Code
NFPA 99 Health Care Facilities Code is the primary standard governing the installation and maintenance of medical gas and vacuum piping systems.
Question 3: What color coding is used to identify medical-grade oxygen piping in the United States?
- Blue
- Green (Correct answer)
- Yellow
- White
Correct answer: Green
Medical oxygen piping is color-coded green in the United States per CGA and NFPA 99 standards.
Question 4: A bulk liquid oxygen system located outdoors must maintain a minimum clearance of how many feet from combustible materials?
- 10 feet
- 25 feet (Correct answer)
- 50 feet
- 15 feet
Correct answer: 25 feet
NFPA 50 requires bulk liquid oxygen systems to maintain a minimum clearance of 25 feet from combustible materials or structures.
Question 5: When performing a medical gas system purge after installation or repair, what gas must be used to purge oxygen piping?
- Carbon dioxide
- Compressed air
- Nitrogen (Correct answer)
- Argon
Correct answer: Nitrogen
Oil-free dry nitrogen is the required purge gas for oxygen piping systems to displace contaminants without introducing flammable gases.
Question 6: Which type of valve must be installed immediately downstream of each medical gas source to allow the source to be isolated without shutting down the entire system?
- Zone valve
- Source valve (Correct answer)
- Service valve
- Pressure relief valve
Correct answer: Source valve
A source valve (also called a main line valve) must be installed immediately downstream of each medical gas source to allow source isolation.
Question 7: According to NFPA 99, medical gas outlet labels must include which information at minimum?
- Gas name only (Correct answer)
- Gas name and pressure rating
- Gas name and flow rate
- Gas name, pressure rating, and installation date
Correct answer: Gas name only
NFPA 99 requires outlet labels to identify the gas name at minimum, though the gas name and outlet type are typically indicated.
RMGA Safety Standards 2
According to NFPA 99, what is the minimum required pressure for a Level 1 medical gas alarm to activate in a zone valve box area?