ASSE 6010 Medical Gas Systems
Installer Exam Practice Questions And
Correct Answers (Verified Answers) Plus
Rationales 2026 Q&A | Instant
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1. What is the primary standard governing the installation of medical gas
and vacuum systems?
A. NFPA 54
B. NFPA 70
C. NFPA 99
D. NFPA 13
Rationale: NFPA 99, Health Care Facilities Code, sets the
requirements for medical gas and vacuum system installation and
maintenance.
2. What type of piping material is required for medical gas systems?
A. Black steel
, B. PVC
C. Copper tube, Type K or L, cleaned for oxygen service
D. Galvanized steel
Rationale: Medical gas systems must use copper tube that is cleaned
and capped for oxygen service to prevent contamination.
3. Which brazing filler metal is acceptable for joining medical gas piping?
A. 35% silver
B. Minimum 15% silver, cadmium-free
C. Tin-lead alloy
D. Phosphorus-copper alloy
Rationale: Brazing must be done with a cadmium-free filler
containing at least 15% silver to prevent toxic contamination.
4. What is the minimum purge gas required during brazing?
A. Nitrogen or carbon dioxide
B. Oil-free, dry nitrogen
C. Compressed air
D. Oxygen
Rationale: Dry, oil-free nitrogen is required to prevent oxidation
inside the tubing during brazing.
5. The term “cleaned for oxygen service” means the tubing is:
A. Sterilized for medical use
B. Coated with oil for protection
C. Free of oil, grease, and other contaminants
, D. Painted and labeled
Rationale: Tubing must be free from any hydrocarbons or
contaminants that could cause combustion with oxygen.
6. Before brazing, nitrogen should be:
A. Used after brazing to cool the joint
B. Flowed continuously through the pipe during brazing
C. Added only to oxygen lines
D. Not used unless required by the manufacturer
Rationale: Continuous nitrogen flow prevents oxidation and scale
formation inside the tube during brazing.
7. The maximum operating pressure for medical air systems is typically:
A. 15 psig
B. 50–55 psig
C. 100 psig
D. 80 psig
Rationale: Medical air systems are generally regulated to maintain a
pressure between 50 and 55 psig.
8. What color is used to identify oxygen pipelines?
A. Yellow
B. Blue
C. Green (white in Canada)
D. Black
Rationale: Green is the standard color for oxygen under NFPA 99.
, 9. What is the identifying color for vacuum piping?
A. Green
B. Yellow
C. Blue
D. Red
Rationale: Vacuum systems are identified with yellow per standard
color coding.
10. What must be done before connecting a new medical gas branch
line to an existing system?
A. Flush with water
B. Connect and test under full pressure
C. Isolate and purge with nitrogen, then pressure test and purge
D. Connect directly and label
Rationale: Isolation and purging prevent contamination and ensure
the line is clean and leak-free.
11. The final connection to a medical gas outlet shall be performed:
A. By a general plumber
B. By an ASSE 6010 certified installer
C. By an engineer
D. By a facility manager
Rationale: Only certified installers may make final connections to
ensure compliance with ASSE 6010 and NFPA 99.
Installer Exam Practice Questions And
Correct Answers (Verified Answers) Plus
Rationales 2026 Q&A | Instant
Download Pdf
1. What is the primary standard governing the installation of medical gas
and vacuum systems?
A. NFPA 54
B. NFPA 70
C. NFPA 99
D. NFPA 13
Rationale: NFPA 99, Health Care Facilities Code, sets the
requirements for medical gas and vacuum system installation and
maintenance.
2. What type of piping material is required for medical gas systems?
A. Black steel
, B. PVC
C. Copper tube, Type K or L, cleaned for oxygen service
D. Galvanized steel
Rationale: Medical gas systems must use copper tube that is cleaned
and capped for oxygen service to prevent contamination.
3. Which brazing filler metal is acceptable for joining medical gas piping?
A. 35% silver
B. Minimum 15% silver, cadmium-free
C. Tin-lead alloy
D. Phosphorus-copper alloy
Rationale: Brazing must be done with a cadmium-free filler
containing at least 15% silver to prevent toxic contamination.
4. What is the minimum purge gas required during brazing?
A. Nitrogen or carbon dioxide
B. Oil-free, dry nitrogen
C. Compressed air
D. Oxygen
Rationale: Dry, oil-free nitrogen is required to prevent oxidation
inside the tubing during brazing.
5. The term “cleaned for oxygen service” means the tubing is:
A. Sterilized for medical use
B. Coated with oil for protection
C. Free of oil, grease, and other contaminants
, D. Painted and labeled
Rationale: Tubing must be free from any hydrocarbons or
contaminants that could cause combustion with oxygen.
6. Before brazing, nitrogen should be:
A. Used after brazing to cool the joint
B. Flowed continuously through the pipe during brazing
C. Added only to oxygen lines
D. Not used unless required by the manufacturer
Rationale: Continuous nitrogen flow prevents oxidation and scale
formation inside the tube during brazing.
7. The maximum operating pressure for medical air systems is typically:
A. 15 psig
B. 50–55 psig
C. 100 psig
D. 80 psig
Rationale: Medical air systems are generally regulated to maintain a
pressure between 50 and 55 psig.
8. What color is used to identify oxygen pipelines?
A. Yellow
B. Blue
C. Green (white in Canada)
D. Black
Rationale: Green is the standard color for oxygen under NFPA 99.
, 9. What is the identifying color for vacuum piping?
A. Green
B. Yellow
C. Blue
D. Red
Rationale: Vacuum systems are identified with yellow per standard
color coding.
10. What must be done before connecting a new medical gas branch
line to an existing system?
A. Flush with water
B. Connect and test under full pressure
C. Isolate and purge with nitrogen, then pressure test and purge
D. Connect directly and label
Rationale: Isolation and purging prevent contamination and ensure
the line is clean and leak-free.
11. The final connection to a medical gas outlet shall be performed:
A. By a general plumber
B. By an ASSE 6010 certified installer
C. By an engineer
D. By a facility manager
Rationale: Only certified installers may make final connections to
ensure compliance with ASSE 6010 and NFPA 99.
