RMGA Safety Protocols & Risk Management 2 — Questions and Answers
Question 1: When a medical gas pipeline system experiences a sudden pressure drop to zero in an oxygen zone, the FIRST action staff should take is:
- Increase the regulator set point
- Activate the zone valve and notify the facility gas administrator
- Switch patients to portable oxygen cylinders immediately (Correct answer)
- Call the gas supplier for emergency delivery
Correct answer: Switch patients to portable oxygen cylinders immediately
A sudden pressure drop to zero means supply failure; patients must be placed on portable oxygen immediately to prevent harm while the root cause is investigated.
Question 2: NFPA 99 categorizes medical gas systems by risk category primarily based on:
- The age of the building
- The potential for patient harm if the system fails (Correct answer)
- The number of outlet stations installed
- The type of gas distributed
Correct answer: The potential for patient harm if the system fails
NFPA 99 risk categories (1–4) are determined by the probability and severity of patient harm resulting from system failure.
Question 3: Which document must be completed and signed before any hot-work (welding) is performed near a medical gas system?
- Material Safety Data Sheet
- Hot-Work Permit (Correct answer)
- Gas Hazard Analysis
- Pressure Test Certificate
Correct answer: Hot-Work Permit
A Hot-Work Permit authorizes welding or open-flame work near flammable or oxygen-enriched environments and documents required precautions.
Question 4: A Designated Person (DP) for medical gas must verify contractor qualifications before system work primarily to ensure:
- The contractor carries general liability insurance
- Work is performed by personnel with documented medical gas training (Correct answer)
- Equipment is covered under an extended warranty
- The work order is approved by the finance department
Correct answer: Work is performed by personnel with documented medical gas training
NFPA 99 requires that all medical gas installation and maintenance be performed by qualified, trained personnel to protect patient safety.
Question 5: An Oxygen Deficient Atmosphere is defined as an environment where oxygen concentration falls below:
- 21%
- 19.5% (Correct answer)
- 16%
- 18%
Correct answer: 19.5%
OSHA and NFPA define an oxygen-deficient atmosphere as one containing less than 19.5% oxygen by volume.
Question 6: When performing maintenance on a medical gas zone valve, the safest practice is to:
- Work on the valve while the system remains pressurized to maintain supply
- Depressurize the downstream section and lock out the valve before work begins (Correct answer)
- Open all outlet stations downstream before beginning work
- Replace the valve only during scheduled shutdowns announced one week in advance
Correct answer: Depressurize the downstream section and lock out the valve before work begins
Lockout/tagout (LOTO) procedures require the line to be depressurized and secured before valve maintenance to prevent injury and uncontrolled gas release.
Question 7: The primary purpose of posting 'No Smoking / No Open Flames' signage at medical gas storage areas is to prevent:
- Unauthorized cylinder removal
- Ignition in an oxygen-enriched environment (Correct answer)
- Theft of high-value gas cylinders
- Carbon dioxide buildup in enclosed spaces
Correct answer: Ignition in an oxygen-enriched environment
Oxygen significantly accelerates combustion; ignition sources near oxygen storage can cause rapid fire or explosion.
RMGA Safety Protocols & Risk Management 2
When a medical gas pipeline system experiences a sudden pressure drop to zero in an oxygen zone, the FIRST action staff should take is: