NFPA-99 Medical Gas Exam (2026) QUESTIONS
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Category 1: Fundamentals, Definitions, and Personnel Qualifications (Questions 1-15)
1. According to NFPA 99, what is the minimum level of qualification required for personnel
performing brazing on a medical gas pipeline?
A. Hand Tool Operator
B. Medical Gas Systems Verifier
C. Medical Gas Systems Inspector
D. Medical Gas Systems Installer
Correct Answer: D
Explanation: NFPA 99 requires that all brazing on medical gas pipelines must be performed by
an individual who is certified as a Medical Gas Systems Installer.
2. The definition of "Line Pressure" in a medical gas system is:
A. The pressure at the source.
B. The pressure measured at the station outlet/inlet.
C. The pressure under static (no-flow) conditions.
D. The pressure downstream of the area alarm sensor.
Correct Answer: B
Explanation: Line pressure is specifically defined as the pressure at the station outlet or inlet
under normal operating conditions.
3. A "Category 1" facility system is defined as:
A. A system where failure is a nuisance.
B. A system where failure could cause minor injury.
C. A system where failure is likely to cause major injury or death of patients or caregivers.
D. A system where failure would have no impact on patient care.
Correct Answer: C
Explanation: Category 1 systems are the highest risk category, where system failure is likely to
cause major injury or death. Medical gas systems typically fall under this category.
4. Who is ultimately responsible for assigning the risk category for the facility's systems?
A. The Architect
,B. The Mechanical Engineer
C. The Facility Administrator
D. The Authority Having Jurisdiction (AHJ)
Correct Answer: C
Explanation: While input is gathered from many parties, the facility's administration is
responsible for the final risk assessment and category assignment.
5. The "Authority Having Jurisdiction (AHJ)" can be all of the following EXCEPT:
A. The local fire marshal.
B. The hospital's CEO.
C. A state health department official.
D. An insurance company representative.
Correct Answer: B
Explanation: The AHJ is the organization, office, or individual responsible for approving
equipment, materials, an installation, or a procedure. The hospital CEO does not typically act as
their own AHJ; it is an external entity.
6. What is the primary purpose of a risk assessment per NFPA 99?
A. To determine the lowest cost for system installation.
B. To categorize systems based on the potential impact of failure on patient care.
C. To select the brand of equipment to be used.
D. To limit the liability of the installing contractor.
Correct Answer: B
*Explanation: The core of NFPA 99 is a risk-based approach, where systems are designed and
maintained based on the consequences of their failure.*
7. A "Medical Gas Systems Verifier" is qualified to:
A. Install the piping system.
B. Perform initial testing of the system and certify its integrity.
C. Perform routine maintenance on the alarm panels.
D. Operate the bulk oxygen storage system.
Correct Answer: B
Explanation: The Verifier is an independent, third-party entity responsible for initial testing,
cross-connection testing, and issuing the initial verification report.
8. Which of the following gases is classified as a "Medical Support Gas"?
A. Oxygen
B. Nitrogen
C. Medical Air
D. Nitrous Oxide
,Correct Answer: B
Explanation: Medical Support Gases, like nitrogen and instrument air, are used to power tools
and equipment, not for direct patient respiration.
9. The term "WAGD" stands for:
A. Waste Anesthetic Gas Disposal
B. Waste Air and Gas Dilution
C. Wall-Accessed Gas Distribution
D. Wide Area Gas Delivery
Correct Answer: A
Explanation: WAGD is the system for removing and disposing of waste anesthetic gases from
patient breathing circuits and operating rooms.
10. What is the required color-coding for the Oxygen outlet/service?
A. Yellow
B. Green
C. Blue
D. White
Correct Answer: B
Explanation: Per the CGA standard, which is incorporated by NFPA, oxygen is assigned the color
GREEN.
11. Personnel qualifications for maintenance tasks on medical gas systems must be
documented and:
A. Approved by the manufacturer.
B. Made available to the AHJ upon request.
C. Posted in the maintenance shop.
D. Renewed annually.
Correct Answer: B
Explanation: The facility must maintain records of personnel qualifications and provide them to
the Authority Having Jurisdiction when requested.
12. The "Patient Medical Gas Headwall" is considered part of:
A. The source equipment.
B. The alarm system.
C. The distribution piping system.
D. The final line of defense.
Correct Answer: C
Explanation: The piping system includes all piping from the source to the station outlets/inlets,
which are typically located on headwalls or columns.
, 13. A "Level 1" system is primarily concerned with:
A. Non-critical care areas.
B. Critical care areas and life support.
C. General laboratory use.
D. Equipment maintenance.
Correct Answer: B
Explanation: Level 1 systems are for critical care and life support, aligning with the Category 1
risk assessment.
14. The responsibility for the daily operation and maintenance of the medical gas system lies
with the:
A. Installing contractor.
B. Facility's designated staff.
C. Medical gas verifier.
D. Equipment manufacturer.
Correct Answer: B
Explanation: Once the system is verified and accepted, the facility assumes responsibility for its
ongoing operation, maintenance, and testing.
15. Which document would provide the most specific installation requirements for a medical
vacuum pump?
A. NFPA 70 (National Electrical Code)
B. NFPA 101 (Life Safety Code)
C. NFPA 99 (Healthcare Facilities Code)
D. The manufacturer's installation manual.
Correct Answer: D
Explanation: While NFPA 99 provides general requirements, the manufacturer's instructions
provide the specific, detailed requirements for their equipment and take precedence.
Category 2: Source Equipment & Central Supply Systems (Questions 16-30)
16. A bulk oxygen liquid storage system must be located away from open flames and what
minimum distance from combustible structures?
A. 5 feet
B. 10 feet
C. 25 feet
D. 50 feet
Correct Answer: C
WITH VERIFIED CORRECT ANSWERS || 100%
GUARANTEED PASS <UPDATED VERSION>
Category 1: Fundamentals, Definitions, and Personnel Qualifications (Questions 1-15)
1. According to NFPA 99, what is the minimum level of qualification required for personnel
performing brazing on a medical gas pipeline?
A. Hand Tool Operator
B. Medical Gas Systems Verifier
C. Medical Gas Systems Inspector
D. Medical Gas Systems Installer
Correct Answer: D
Explanation: NFPA 99 requires that all brazing on medical gas pipelines must be performed by
an individual who is certified as a Medical Gas Systems Installer.
2. The definition of "Line Pressure" in a medical gas system is:
A. The pressure at the source.
B. The pressure measured at the station outlet/inlet.
C. The pressure under static (no-flow) conditions.
D. The pressure downstream of the area alarm sensor.
Correct Answer: B
Explanation: Line pressure is specifically defined as the pressure at the station outlet or inlet
under normal operating conditions.
3. A "Category 1" facility system is defined as:
A. A system where failure is a nuisance.
B. A system where failure could cause minor injury.
C. A system where failure is likely to cause major injury or death of patients or caregivers.
D. A system where failure would have no impact on patient care.
Correct Answer: C
Explanation: Category 1 systems are the highest risk category, where system failure is likely to
cause major injury or death. Medical gas systems typically fall under this category.
4. Who is ultimately responsible for assigning the risk category for the facility's systems?
A. The Architect
,B. The Mechanical Engineer
C. The Facility Administrator
D. The Authority Having Jurisdiction (AHJ)
Correct Answer: C
Explanation: While input is gathered from many parties, the facility's administration is
responsible for the final risk assessment and category assignment.
5. The "Authority Having Jurisdiction (AHJ)" can be all of the following EXCEPT:
A. The local fire marshal.
B. The hospital's CEO.
C. A state health department official.
D. An insurance company representative.
Correct Answer: B
Explanation: The AHJ is the organization, office, or individual responsible for approving
equipment, materials, an installation, or a procedure. The hospital CEO does not typically act as
their own AHJ; it is an external entity.
6. What is the primary purpose of a risk assessment per NFPA 99?
A. To determine the lowest cost for system installation.
B. To categorize systems based on the potential impact of failure on patient care.
C. To select the brand of equipment to be used.
D. To limit the liability of the installing contractor.
Correct Answer: B
*Explanation: The core of NFPA 99 is a risk-based approach, where systems are designed and
maintained based on the consequences of their failure.*
7. A "Medical Gas Systems Verifier" is qualified to:
A. Install the piping system.
B. Perform initial testing of the system and certify its integrity.
C. Perform routine maintenance on the alarm panels.
D. Operate the bulk oxygen storage system.
Correct Answer: B
Explanation: The Verifier is an independent, third-party entity responsible for initial testing,
cross-connection testing, and issuing the initial verification report.
8. Which of the following gases is classified as a "Medical Support Gas"?
A. Oxygen
B. Nitrogen
C. Medical Air
D. Nitrous Oxide
,Correct Answer: B
Explanation: Medical Support Gases, like nitrogen and instrument air, are used to power tools
and equipment, not for direct patient respiration.
9. The term "WAGD" stands for:
A. Waste Anesthetic Gas Disposal
B. Waste Air and Gas Dilution
C. Wall-Accessed Gas Distribution
D. Wide Area Gas Delivery
Correct Answer: A
Explanation: WAGD is the system for removing and disposing of waste anesthetic gases from
patient breathing circuits and operating rooms.
10. What is the required color-coding for the Oxygen outlet/service?
A. Yellow
B. Green
C. Blue
D. White
Correct Answer: B
Explanation: Per the CGA standard, which is incorporated by NFPA, oxygen is assigned the color
GREEN.
11. Personnel qualifications for maintenance tasks on medical gas systems must be
documented and:
A. Approved by the manufacturer.
B. Made available to the AHJ upon request.
C. Posted in the maintenance shop.
D. Renewed annually.
Correct Answer: B
Explanation: The facility must maintain records of personnel qualifications and provide them to
the Authority Having Jurisdiction when requested.
12. The "Patient Medical Gas Headwall" is considered part of:
A. The source equipment.
B. The alarm system.
C. The distribution piping system.
D. The final line of defense.
Correct Answer: C
Explanation: The piping system includes all piping from the source to the station outlets/inlets,
which are typically located on headwalls or columns.
, 13. A "Level 1" system is primarily concerned with:
A. Non-critical care areas.
B. Critical care areas and life support.
C. General laboratory use.
D. Equipment maintenance.
Correct Answer: B
Explanation: Level 1 systems are for critical care and life support, aligning with the Category 1
risk assessment.
14. The responsibility for the daily operation and maintenance of the medical gas system lies
with the:
A. Installing contractor.
B. Facility's designated staff.
C. Medical gas verifier.
D. Equipment manufacturer.
Correct Answer: B
Explanation: Once the system is verified and accepted, the facility assumes responsibility for its
ongoing operation, maintenance, and testing.
15. Which document would provide the most specific installation requirements for a medical
vacuum pump?
A. NFPA 70 (National Electrical Code)
B. NFPA 101 (Life Safety Code)
C. NFPA 99 (Healthcare Facilities Code)
D. The manufacturer's installation manual.
Correct Answer: D
Explanation: While NFPA 99 provides general requirements, the manufacturer's instructions
provide the specific, detailed requirements for their equipment and take precedence.
Category 2: Source Equipment & Central Supply Systems (Questions 16-30)
16. A bulk oxygen liquid storage system must be located away from open flames and what
minimum distance from combustible structures?
A. 5 feet
B. 10 feet
C. 25 feet
D. 50 feet
Correct Answer: C
