Medical Gas Questions Latest Update 2025-2026
Actual Exam Questions with 100% Verified
Correct Answers with Rationale Guaranteed A+
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Questions and Answers
• 1.
Runouts from horizontal mains or branches shall be taken off ________ the centerline
of the pipeline.
o A.
Above
o B.
Below
o C.
At
o D.
From
,Correct Answer
A. Above
Explanation
According to the NFPA 99: Health Care Facilities Code, when runouts are made from
horizontal mains or branches, they should be taken off above the centerline of the
pipeline. This is because locating the runouts above the centerline ensures that any air
or gas pockets in the pipeline can be easily released. Additionally, taking the runouts off
above the centerline helps to prevent the accumulation of sediment or debris in the
runouts, which could potentially obstruct the flow of fluid in the pipeline.
Rate this question:
3
• 2.
While brazing medical-gas copper joints, a purge gas shall flow continuously to prevent
the formation of copper oxide on the inside surface of the joint. What shall be used as a
purge gas?
o A.
Oil-free, dry Argon MD
o B.
Oil-free, dry Helium NF
o C.
Oil-free, dry Nitrogen NF
o D.
Any inert gas
Correct Answer
C. Oil-free, dry Nitrogen NF
Explanation
During the brazing process of medical-gas copper joints, it is important to prevent the
formation of copper oxide on the inside surface of the joint. To achieve this, a purge gas
needs to flow continuously. The most suitable option for a purge gas in this scenario is
oil-free, dry Nitrogen NF. Nitrogen is an inert gas that does not react with copper or
,other materials, making it ideal for preventing oxidation. Additionally, using oil-free and
dry nitrogen ensures that no contaminants or moisture are introduced into the joint,
maintaining the integrity of the medical-gas system.
Rate this question:
4
• 3.
Which of the following filler metals shall be used to braze copper-to-copper joints in
medical gas/vacuum distribution piping?
o A.
BAg series
o B.
BAu series
o C.
BCuP series
o D.
BNi series
Correct Answer
C. BCuP series
Explanation
The BCuP series filler metals should be used to braze copper-to-copper joints in
medical gas/vacuum distribution piping. This series is specifically designed for brazing
copper and provides a strong and reliable joint. The BCuP series filler metals have good
flow characteristics and are capable of filling small gaps and imperfections in the joint,
ensuring a leak-free connection. Additionally, these filler metals have a low melting
point, making them suitable for brazing copper pipes without causing damage to the
base metal.
Rate this question:
3
• 4.
, Tubing for positive pressure medical gas systems delivered from the manufacturer shall
be__________________.
o A.
Plugged or capped
o B.
Harddrawn seamless
o C.
Identified as “oxy” or “med”
o D.
All of the above
Correct Answer
D. All of the above
Explanation
The correct answer is "All of the above". This means that tubing for positive pressure
medical gas systems delivered from the manufacturer should be plugged or capped,
harddrawn seamless, and identified as "oxy" or "med". These requirements ensure the
safety and proper functioning of the medical gas systems.
Rate this question:
3
• 5.
In positive pressure systems, area alarm sensors for vital life support and critical care
areas shall be located on which side of the zone valve box assemblies?
o A.
Patient room side
o B.
Outlet/inlet side
o C.
Downstream side
Actual Exam Questions with 100% Verified
Correct Answers with Rationale Guaranteed A+
Verified by Professor
Questions and Answers
• 1.
Runouts from horizontal mains or branches shall be taken off ________ the centerline
of the pipeline.
o A.
Above
o B.
Below
o C.
At
o D.
From
,Correct Answer
A. Above
Explanation
According to the NFPA 99: Health Care Facilities Code, when runouts are made from
horizontal mains or branches, they should be taken off above the centerline of the
pipeline. This is because locating the runouts above the centerline ensures that any air
or gas pockets in the pipeline can be easily released. Additionally, taking the runouts off
above the centerline helps to prevent the accumulation of sediment or debris in the
runouts, which could potentially obstruct the flow of fluid in the pipeline.
Rate this question:
3
• 2.
While brazing medical-gas copper joints, a purge gas shall flow continuously to prevent
the formation of copper oxide on the inside surface of the joint. What shall be used as a
purge gas?
o A.
Oil-free, dry Argon MD
o B.
Oil-free, dry Helium NF
o C.
Oil-free, dry Nitrogen NF
o D.
Any inert gas
Correct Answer
C. Oil-free, dry Nitrogen NF
Explanation
During the brazing process of medical-gas copper joints, it is important to prevent the
formation of copper oxide on the inside surface of the joint. To achieve this, a purge gas
needs to flow continuously. The most suitable option for a purge gas in this scenario is
oil-free, dry Nitrogen NF. Nitrogen is an inert gas that does not react with copper or
,other materials, making it ideal for preventing oxidation. Additionally, using oil-free and
dry nitrogen ensures that no contaminants or moisture are introduced into the joint,
maintaining the integrity of the medical-gas system.
Rate this question:
4
• 3.
Which of the following filler metals shall be used to braze copper-to-copper joints in
medical gas/vacuum distribution piping?
o A.
BAg series
o B.
BAu series
o C.
BCuP series
o D.
BNi series
Correct Answer
C. BCuP series
Explanation
The BCuP series filler metals should be used to braze copper-to-copper joints in
medical gas/vacuum distribution piping. This series is specifically designed for brazing
copper and provides a strong and reliable joint. The BCuP series filler metals have good
flow characteristics and are capable of filling small gaps and imperfections in the joint,
ensuring a leak-free connection. Additionally, these filler metals have a low melting
point, making them suitable for brazing copper pipes without causing damage to the
base metal.
Rate this question:
3
• 4.
, Tubing for positive pressure medical gas systems delivered from the manufacturer shall
be__________________.
o A.
Plugged or capped
o B.
Harddrawn seamless
o C.
Identified as “oxy” or “med”
o D.
All of the above
Correct Answer
D. All of the above
Explanation
The correct answer is "All of the above". This means that tubing for positive pressure
medical gas systems delivered from the manufacturer should be plugged or capped,
harddrawn seamless, and identified as "oxy" or "med". These requirements ensure the
safety and proper functioning of the medical gas systems.
Rate this question:
3
• 5.
In positive pressure systems, area alarm sensors for vital life support and critical care
areas shall be located on which side of the zone valve box assemblies?
o A.
Patient room side
o B.
Outlet/inlet side
o C.
Downstream side
