MED GAS ACTUAL EXAM QUESTIONS AND VERIFIED
ANSWERS | NEWEST UPDATE 2026/2027 | GRADED
A+ | 100% ASSURED PASS.
When is the initial pressure test conducted, by a medical gas installer, on a nitrous oxide
system? - ANSWER- After blowdown of a distribution piping
Which of the following treatments shall be performed before brazing cut ends of a tube
to be installed in a medical gas piping system? - ANSWER- Cut ends shall be rolled
smooth or deburred
In those portions of systems intended to handle oxygen at pressures greater than 350
psi the interconnecting hose shall NOT contain ________ materials? - ANSWER-
Polymeric
In a Category 1 Dental and Gas Vacuum Piping system, which of the following is an
NFPA 99 requirement for the labeling of pipes? - ANSWER- Color coding & nonstandard
pressure
Manifolds for gas cylinders shall actuate a(an) _______ signal and shall activate an
indicator at all _______ alarm panels to indicate when or just before changeover from
one header to the other. - ANSWER- Local, master
In a non-anesthetizing area, on which side of a zone valve shall the pressure/vacuum
sensor be located? - ANSWER- Station outlet/inlet
What is the purpose of using an oxygen analyzer during the piping purge prior to
brazing? - ANSWER- Assure that all ambient air has been removed from the pipeline
,A medical gas master or area alarm panel shall be set to actuate a(an) _____ indicator
when the communication with an alarm-initiating device is disconnected. - ANSWER-
Audible and visual
Metallic flexible joints are being used in the pipeline for vibration control. Which of the
following is NOT required of such joints? - ANSWER- suitable for service at 150 psig or
above
who shall witness the installer-performed standing vacuum test? - ANSWER- the
authority having jurisdiction, or its designee
the medical air compressor intake shall be located a minimum of how many feet from
any exhaust or plumbing vents? - ANSWER- 25 feet
the gas produced by evaporation from the secondary header in a cryogenic liquid
cylinder system shall enter the supply system ________ of the final line regulator. -
ANSWER- upstream
When an EOSC becomes the temporary supply source, a facility will monitor the system
by use of which of the following? - ANSWER- Providing four connection points to both
master alarms
Which of the following conditions must be met where medical gas and vacuum systems
are installed by non-certified personnel? - ANSWER- installation by anyone other than
6010 certified personnel is NOT permitted
Which of the following systems shall NOT be permitted to be located in an outdoor
enclosure? - ANSWER- Medical air compressor supply sources
with the approval of the Authority Having Jurisdiction, in which areas shall the zone
valves be permitted to be secured to prevent inappropriate access? - ANSWER-
pediatric
factory installed inlet tubes on station outlets shall be NOT less than __________with
0.3 inch minimum inside diameter. - ANSWER- NPS 1/4, 3/8 in. O.D.
which of these operations would not breach the vacuum system? - ANSWER- testing a
system component with a leak detector solution
, except for valves in zone valve boxes, all valves shall be located in secured areas such
as locked pipe chases, or be __________. - ANSWER- latched or locked in operation
position
NFPA 99 specifies that the medical gas piping system shall be protected against all
EXCEPT which of the following? - ANSWER- exposure to liquids
category 1 support gasses carry which of these additional hazards? - ANSWER- higher
pressures
manufactured assemblies for medical gas systems employing flexible hose shall use
flexible connectors with a minimum burst gauge pressure of how many psi? - ANSWER-
1000
an assembly of equipment that holds a capacity of oxygen greater than ____________
is defined as a Bulk Oxygen System - ANSWER- 20,000 ft^3
what does it mean when equipment, material or services are shows as "listed"? -
ANSWER- they are identified and published by an organization that is acceptable to the
authority having jurisdiction
medical gas Central Supply systems are NOT permitted to be located where? -
ANSWER- in an unlocked location
fittings, valves, and other components for field-installed positive pressure distribution
systems shall be ________ until prepared for installation. - ANSWER- delivered sealed,
labeled, and kept sealed
vacuum piping for __________ shall be connected separately from the medical surgical
system directly to the receiver tank through its own isolation valve and fluid trap located
at the receiver. - ANSWER- a teaching laboratory
under which of these conditions shall instrument air reserve header cylinders be
permitted to be stored with the instrument air compressor? - ANSWER- the only
motordriven machinery in the rooms is for the instrument air equipment.
ANSWERS | NEWEST UPDATE 2026/2027 | GRADED
A+ | 100% ASSURED PASS.
When is the initial pressure test conducted, by a medical gas installer, on a nitrous oxide
system? - ANSWER- After blowdown of a distribution piping
Which of the following treatments shall be performed before brazing cut ends of a tube
to be installed in a medical gas piping system? - ANSWER- Cut ends shall be rolled
smooth or deburred
In those portions of systems intended to handle oxygen at pressures greater than 350
psi the interconnecting hose shall NOT contain ________ materials? - ANSWER-
Polymeric
In a Category 1 Dental and Gas Vacuum Piping system, which of the following is an
NFPA 99 requirement for the labeling of pipes? - ANSWER- Color coding & nonstandard
pressure
Manifolds for gas cylinders shall actuate a(an) _______ signal and shall activate an
indicator at all _______ alarm panels to indicate when or just before changeover from
one header to the other. - ANSWER- Local, master
In a non-anesthetizing area, on which side of a zone valve shall the pressure/vacuum
sensor be located? - ANSWER- Station outlet/inlet
What is the purpose of using an oxygen analyzer during the piping purge prior to
brazing? - ANSWER- Assure that all ambient air has been removed from the pipeline
,A medical gas master or area alarm panel shall be set to actuate a(an) _____ indicator
when the communication with an alarm-initiating device is disconnected. - ANSWER-
Audible and visual
Metallic flexible joints are being used in the pipeline for vibration control. Which of the
following is NOT required of such joints? - ANSWER- suitable for service at 150 psig or
above
who shall witness the installer-performed standing vacuum test? - ANSWER- the
authority having jurisdiction, or its designee
the medical air compressor intake shall be located a minimum of how many feet from
any exhaust or plumbing vents? - ANSWER- 25 feet
the gas produced by evaporation from the secondary header in a cryogenic liquid
cylinder system shall enter the supply system ________ of the final line regulator. -
ANSWER- upstream
When an EOSC becomes the temporary supply source, a facility will monitor the system
by use of which of the following? - ANSWER- Providing four connection points to both
master alarms
Which of the following conditions must be met where medical gas and vacuum systems
are installed by non-certified personnel? - ANSWER- installation by anyone other than
6010 certified personnel is NOT permitted
Which of the following systems shall NOT be permitted to be located in an outdoor
enclosure? - ANSWER- Medical air compressor supply sources
with the approval of the Authority Having Jurisdiction, in which areas shall the zone
valves be permitted to be secured to prevent inappropriate access? - ANSWER-
pediatric
factory installed inlet tubes on station outlets shall be NOT less than __________with
0.3 inch minimum inside diameter. - ANSWER- NPS 1/4, 3/8 in. O.D.
which of these operations would not breach the vacuum system? - ANSWER- testing a
system component with a leak detector solution
, except for valves in zone valve boxes, all valves shall be located in secured areas such
as locked pipe chases, or be __________. - ANSWER- latched or locked in operation
position
NFPA 99 specifies that the medical gas piping system shall be protected against all
EXCEPT which of the following? - ANSWER- exposure to liquids
category 1 support gasses carry which of these additional hazards? - ANSWER- higher
pressures
manufactured assemblies for medical gas systems employing flexible hose shall use
flexible connectors with a minimum burst gauge pressure of how many psi? - ANSWER-
1000
an assembly of equipment that holds a capacity of oxygen greater than ____________
is defined as a Bulk Oxygen System - ANSWER- 20,000 ft^3
what does it mean when equipment, material or services are shows as "listed"? -
ANSWER- they are identified and published by an organization that is acceptable to the
authority having jurisdiction
medical gas Central Supply systems are NOT permitted to be located where? -
ANSWER- in an unlocked location
fittings, valves, and other components for field-installed positive pressure distribution
systems shall be ________ until prepared for installation. - ANSWER- delivered sealed,
labeled, and kept sealed
vacuum piping for __________ shall be connected separately from the medical surgical
system directly to the receiver tank through its own isolation valve and fluid trap located
at the receiver. - ANSWER- a teaching laboratory
under which of these conditions shall instrument air reserve header cylinders be
permitted to be stored with the instrument air compressor? - ANSWER- the only
motordriven machinery in the rooms is for the instrument air equipment.
