Medical Gas Systems Certification
Practice Exam (2026 Edition)|||
questions and answers with
rationales/graded A+/2026
update/100% correct /instant
download
Exam Instructions:
• This test consists of 85 multiple-choice questions.
• Each question has one correct answer (highlighted in bold).
• A rationale is provided after each answer.
• Time allowed (simulated): 120 minutes.
• Passing score: 75% (64 correct).
Section 1: General Requirements & Safety (Questions 1–15)
1. The primary standard governing medical gas systems in the United States
(2026 edition) is:
A) ASME B31.3
B) NFPA 99
C) OSHA 1910.1030
D) EPA 40 CFR Part 82
Correct Answer: B
Rationale: NFPA 99 (Health Care Facilities Code) is the primary standard for
medical gas systems, including installation, testing, and certification. 2026 edition
updates include digital pressure monitoring requirements.
2. Which agency typically enforces medical gas system compliance in
hospitals?
,A) FDA
B) CMS (Centers for Medicare & Medicaid Services)
C) DOT
D) DEA
Correct Answer: B
*Rationale: CMS enforces compliance through Conditions of Participation,
referencing NFPA 99. Non-compliance can result in loss of Medicare funding.*
3. The minimum acceptable purity level for medical air (NFPA 99-2026) is:
A) 99.0%
B) 99.5%
C) 99.9%
D) 99.99%
Correct Answer: C (99.9%)
*Rationale: Medical air must have ≤10 ppm CO, ≤25 ppm total hydrocarbons, and
≥99.9% oxygen-equivalent purity. New 2026 limits add real-time moisture
monitoring.*
4. A medical gas system verification test must be performed by a(n):
A) Hospital maintenance staff
B) ASSE 6010 certified medical gas verifier
C) Electrician with NFPA 70 certification
D) Registered nurse
Correct Answer: B
Rationale: Only ASSE 6010 (Medical Gas Systems Verifier) certified individuals
can perform final verification testing per NFPA 99.
5. Which gas is NOT considered a medical gas under NFPA 99?
A) Oxygen
B) Medical Air
C) Carbon Dioxide (for insufflation)
D) Compressed shop air for tools
Correct Answer: D
Rationale: Shop air is not for patient use. Medical gases are those used for
diagnostic, therapeutic, or anesthetic purposes.
, 6. The maximum allowable pressure drop in a medical gas pipeline during
static pressure test is:
A) 0% over 24 hours
B) 1% over 1 hour
C) 5% over 30 minutes
D) 10% over 2 hours
Correct Answer: A
Rationale: The NFPA 99 static pressure test requires no detectable pressure drop
(0%) over 24 hours after temperature stabilization.
7. Who can perform brazing on medical gas piping?
A) Any licensed plumber
B) ASSE 6040 certified medical gas installer
C) HVAC technician with EPA 608
D) Hospital engineer
Correct Answer: B
*Rationale: ASSE 6040 (Medical Gas Systems Installer) certification is required
for brazing medical gas lines to ensure clean, oxygen-safe joints.*
8. The color code for medical vacuum piping per CGA C-9 (2025 revision) is:
A) Green
B) Yellow
C) White
D) Violet (Purple)
Correct Answer: D
Rationale: Medical vacuum piping is Violet. Oxygen is Green, Nitrous Oxide is
Blue, Medical Air is Yellow.
9. What is the minimum distance between a medical gas vent and an air
intake?
A) 5 ft
B) 10 ft
C) 20 ft
D) 50 ft
Correct Answer: C
*Rationale: NFPA 99 requires 20 ft separation to prevent exhaust re-entrainment.
2026 added stricter monitoring for CO near intakes.*
Practice Exam (2026 Edition)|||
questions and answers with
rationales/graded A+/2026
update/100% correct /instant
download
Exam Instructions:
• This test consists of 85 multiple-choice questions.
• Each question has one correct answer (highlighted in bold).
• A rationale is provided after each answer.
• Time allowed (simulated): 120 minutes.
• Passing score: 75% (64 correct).
Section 1: General Requirements & Safety (Questions 1–15)
1. The primary standard governing medical gas systems in the United States
(2026 edition) is:
A) ASME B31.3
B) NFPA 99
C) OSHA 1910.1030
D) EPA 40 CFR Part 82
Correct Answer: B
Rationale: NFPA 99 (Health Care Facilities Code) is the primary standard for
medical gas systems, including installation, testing, and certification. 2026 edition
updates include digital pressure monitoring requirements.
2. Which agency typically enforces medical gas system compliance in
hospitals?
,A) FDA
B) CMS (Centers for Medicare & Medicaid Services)
C) DOT
D) DEA
Correct Answer: B
*Rationale: CMS enforces compliance through Conditions of Participation,
referencing NFPA 99. Non-compliance can result in loss of Medicare funding.*
3. The minimum acceptable purity level for medical air (NFPA 99-2026) is:
A) 99.0%
B) 99.5%
C) 99.9%
D) 99.99%
Correct Answer: C (99.9%)
*Rationale: Medical air must have ≤10 ppm CO, ≤25 ppm total hydrocarbons, and
≥99.9% oxygen-equivalent purity. New 2026 limits add real-time moisture
monitoring.*
4. A medical gas system verification test must be performed by a(n):
A) Hospital maintenance staff
B) ASSE 6010 certified medical gas verifier
C) Electrician with NFPA 70 certification
D) Registered nurse
Correct Answer: B
Rationale: Only ASSE 6010 (Medical Gas Systems Verifier) certified individuals
can perform final verification testing per NFPA 99.
5. Which gas is NOT considered a medical gas under NFPA 99?
A) Oxygen
B) Medical Air
C) Carbon Dioxide (for insufflation)
D) Compressed shop air for tools
Correct Answer: D
Rationale: Shop air is not for patient use. Medical gases are those used for
diagnostic, therapeutic, or anesthetic purposes.
, 6. The maximum allowable pressure drop in a medical gas pipeline during
static pressure test is:
A) 0% over 24 hours
B) 1% over 1 hour
C) 5% over 30 minutes
D) 10% over 2 hours
Correct Answer: A
Rationale: The NFPA 99 static pressure test requires no detectable pressure drop
(0%) over 24 hours after temperature stabilization.
7. Who can perform brazing on medical gas piping?
A) Any licensed plumber
B) ASSE 6040 certified medical gas installer
C) HVAC technician with EPA 608
D) Hospital engineer
Correct Answer: B
*Rationale: ASSE 6040 (Medical Gas Systems Installer) certification is required
for brazing medical gas lines to ensure clean, oxygen-safe joints.*
8. The color code for medical vacuum piping per CGA C-9 (2025 revision) is:
A) Green
B) Yellow
C) White
D) Violet (Purple)
Correct Answer: D
Rationale: Medical vacuum piping is Violet. Oxygen is Green, Nitrous Oxide is
Blue, Medical Air is Yellow.
9. What is the minimum distance between a medical gas vent and an air
intake?
A) 5 ft
B) 10 ft
C) 20 ft
D) 50 ft
Correct Answer: C
*Rationale: NFPA 99 requires 20 ft separation to prevent exhaust re-entrainment.
2026 added stricter monitoring for CO near intakes.*
