MED GAS STUDY GUIDE QUESTIONS
AND ANSWERS 2025
,When is the initial pressure test conducted, by a medical gas installer, on a nitrous
oxide system? - ANSWERSAfter blowdown of a distribution piping
In those portions of systems intended to handle oxygen at pressures greater than 350
psi the interconnecting hose shall NOT contain ________ materials? -
ANSWERSPolymeric
In a Category 1 Dental and Gas Vacuum Piping system, which of the following is an
NFPA 99 requirement for the labeling of pipes? - ANSWERSColor coding & non-
standard pressure
Which of the following treatments shall be performed before brazing cut ends of a tube
to be installed in a medical gas piping system? - ANSWERSCut ends shall be rolled
smooth or deburred
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. - ANSWERSLocal, master
In a non-anesthetizing area, on which side of a zone valve shall the pressure/vacuum
sensor be located? - ANSWERSStation outlet/inlet
What is the purpose of using an oxygen analyzer during the piping purge prior to
brazing? - ANSWERSAssure 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. -
ANSWERSAudible and visual
When an EOSC becomes the temporary supply source, a facility will monitor the system
by use of which of the following? - ANSWERSProviding 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? - ANSWERSinstallation 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? - ANSWERSMedical air compressor supply sources
, Metallic flexible joints are being used in the pipeline for vibration control. Which of the
following is NOT required of such joints? - ANSWERSsuitable for service at 150 psig or
above
who shall witness the installer-performed standing vacuum test? - ANSWERSthe
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? - ANSWERS25 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. -
ANSWERSupstream
with the approval of the Authority Having Jurisdiction, in which areas shall the zone
valves be permitted to be secured to prevent inappropriate access? -
ANSWERSpediatric
factory installed inlet tubes on station outlets shall be NOT less than __________with
0.3 inch minimum inside diameter. - ANSWERSNPS 1/4, 3/8 in. O.D.
which of these operations would not breach the vacuum system? - ANSWERStesting 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 __________. - ANSWERSlatched or locked in operation
position
medical gas Central Supply systems are NOT permitted to be located where? -
ANSWERSin an unlocked location
fittings, valves, and other components for field-installed positive pressure distribution
systems shall be ________ until prepared for installation. - ANSWERSdelivered 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. - ANSWERSa teaching laboratory
NFPA 99 specifies that the medical gas piping system shall be protected against all
EXCEPT which of the following? - ANSWERSexposure to liquids
category 1 support gasses carry which of these additional hazards? - ANSWERShigher
pressures
AND ANSWERS 2025
,When is the initial pressure test conducted, by a medical gas installer, on a nitrous
oxide system? - ANSWERSAfter blowdown of a distribution piping
In those portions of systems intended to handle oxygen at pressures greater than 350
psi the interconnecting hose shall NOT contain ________ materials? -
ANSWERSPolymeric
In a Category 1 Dental and Gas Vacuum Piping system, which of the following is an
NFPA 99 requirement for the labeling of pipes? - ANSWERSColor coding & non-
standard pressure
Which of the following treatments shall be performed before brazing cut ends of a tube
to be installed in a medical gas piping system? - ANSWERSCut ends shall be rolled
smooth or deburred
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. - ANSWERSLocal, master
In a non-anesthetizing area, on which side of a zone valve shall the pressure/vacuum
sensor be located? - ANSWERSStation outlet/inlet
What is the purpose of using an oxygen analyzer during the piping purge prior to
brazing? - ANSWERSAssure 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. -
ANSWERSAudible and visual
When an EOSC becomes the temporary supply source, a facility will monitor the system
by use of which of the following? - ANSWERSProviding 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? - ANSWERSinstallation 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? - ANSWERSMedical air compressor supply sources
, Metallic flexible joints are being used in the pipeline for vibration control. Which of the
following is NOT required of such joints? - ANSWERSsuitable for service at 150 psig or
above
who shall witness the installer-performed standing vacuum test? - ANSWERSthe
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? - ANSWERS25 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. -
ANSWERSupstream
with the approval of the Authority Having Jurisdiction, in which areas shall the zone
valves be permitted to be secured to prevent inappropriate access? -
ANSWERSpediatric
factory installed inlet tubes on station outlets shall be NOT less than __________with
0.3 inch minimum inside diameter. - ANSWERSNPS 1/4, 3/8 in. O.D.
which of these operations would not breach the vacuum system? - ANSWERStesting 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 __________. - ANSWERSlatched or locked in operation
position
medical gas Central Supply systems are NOT permitted to be located where? -
ANSWERSin an unlocked location
fittings, valves, and other components for field-installed positive pressure distribution
systems shall be ________ until prepared for installation. - ANSWERSdelivered 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. - ANSWERSa teaching laboratory
NFPA 99 specifies that the medical gas piping system shall be protected against all
EXCEPT which of the following? - ANSWERSexposure to liquids
category 1 support gasses carry which of these additional hazards? - ANSWERShigher
pressures
