Installer Exam Practice Questions And

ASSE 6010 Medical Gas Systems Installer Exam Practice Questions And Correct Answers (Verified Answers) Plus Rationales 2026 Q&A | Instant Download Pdf

• 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.

• What type of piping material is required for medical gas systems?
• Black steel 1 / 4

B. PVC

• Copper tube, Type K or L, cleaned for oxygen service
• Galvanized steel

Rationale: Medical gas systems must use copper tube that is cleaned

and capped for oxygen service to prevent contamination.

• Which brazing filler metal is acceptable for joining medical gas piping?
• 35% silver
• Minimum 15% silver, cadmium-free
• Tin-lead alloy
• Phosphorus-copper alloy

Rationale: Brazing must be done with a cadmium-free filler

containing at least 15% silver to prevent toxic contamination.

• What is the minimum purge gas required during brazing?
• Nitrogen or carbon dioxide
• Oil-free, dry nitrogen
• Compressed air
• 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:

• Sterilized for medical use
• Coated with oil for protection
• Free of oil, grease, and other contaminants 2 / 4

• 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:

• Used after brazing to cool the joint
• Flowed continuously through the pipe during brazing
• Added only to oxygen lines
• 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:

• 15 psig
• 50–55 psig
• 100 psig
• 80 psig

Rationale: Medical air systems are generally regulated to maintain a

pressure between 50 and 55 psig.

• What color is used to identify oxygen pipelines?
• Yellow
• Blue
• Green (white in Canada)
• Black

Rationale: Green is the standard color for oxygen under NFPA 99. 3 / 4

• What is the identifying color for vacuum piping?
• Green
• Yellow
• Blue
• Red

Rationale: Vacuum systems are identified with yellow per standard

color coding.

• What must be done before connecting a new medical gas branch

line to an existing system?

• Flush with water
• Connect and test under full pressure
• Isolate and purge with nitrogen, then pressure test and purge
• 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:

• By a general plumber
• By an ASSE 6010 certified installer
• By an engineer
• By a facility manager

Rationale: Only certified installers may make final connections to

ensure compliance with ASSE 6010 and NFPA 99.

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