MED GAS STUDY GUIDE WITH
COMPLETE SOLUTIONS
When is the initial pressure test conducted, by a medical gas installer, on a nitrous
oxide system? - ANSWER-After 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? - 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 & 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? - ANSWER-Cut 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. - 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
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
,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
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
medical gas Central Supply systems are NOT permitted to be located where? -
ANSWER-in an unlocked location
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
under which of these conditions shall instrument air reserve header cylinders be
permitted to be stored with the instrument air compressor? - ANSWER-the only motor-
driven machinery in the rooms is for the instrument air equipment.
which type of copper tube hangers shall be used in a potentially damp location? -
ANSWER-plastic coated
stainless tubes may be joined by any methods EXCEPT which of the following? -
ANSWER-Braze
, 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
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
gas storage for Central Supply Systems required specialized knowledge and
consideration of information in the NFPA 55 for locating, installing and inspection of
which of the following? - ANSWER-Bulk Gas
all pressure relief valves shall be made of ______ brass, or bronze. - ANSWER-
stainless steel
the reserve header in a cryogenic liquid cylinder manifold system shall have sufficient
cylinder connections for one average day's supply, but NOT fewer than how many
connections? - ANSWER-3
all fittings for medical gas work shall be kept separate from other tools and kept free of
grease or oil. If cleaned, only a degreaser such as __________ is permitted. -
ANSWER-trisodium phosphate or sodium carbonate with potable water
station outlets/inlets shall be identified as to the ________ for the specific gas or
vacuum provided. - ANSWER-name or chemical symbol
when brazing, joints shall be continuously purges with oil-free, dry nitrogen NF to
prevent the formation of __________ on the inside surfaces of the joint. - ANSWER-
copper oxide
a bulk cryogenic supply contains parallel-piped duplex line regulators. Which of the
following is a requirement for controls for line pressure? - ANSWER-a balanced design
COMPLETE SOLUTIONS
When is the initial pressure test conducted, by a medical gas installer, on a nitrous
oxide system? - ANSWER-After 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? - 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 & 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? - ANSWER-Cut 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. - 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
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
,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
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
medical gas Central Supply systems are NOT permitted to be located where? -
ANSWER-in an unlocked location
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
under which of these conditions shall instrument air reserve header cylinders be
permitted to be stored with the instrument air compressor? - ANSWER-the only motor-
driven machinery in the rooms is for the instrument air equipment.
which type of copper tube hangers shall be used in a potentially damp location? -
ANSWER-plastic coated
stainless tubes may be joined by any methods EXCEPT which of the following? -
ANSWER-Braze
, 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
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
gas storage for Central Supply Systems required specialized knowledge and
consideration of information in the NFPA 55 for locating, installing and inspection of
which of the following? - ANSWER-Bulk Gas
all pressure relief valves shall be made of ______ brass, or bronze. - ANSWER-
stainless steel
the reserve header in a cryogenic liquid cylinder manifold system shall have sufficient
cylinder connections for one average day's supply, but NOT fewer than how many
connections? - ANSWER-3
all fittings for medical gas work shall be kept separate from other tools and kept free of
grease or oil. If cleaned, only a degreaser such as __________ is permitted. -
ANSWER-trisodium phosphate or sodium carbonate with potable water
station outlets/inlets shall be identified as to the ________ for the specific gas or
vacuum provided. - ANSWER-name or chemical symbol
when brazing, joints shall be continuously purges with oil-free, dry nitrogen NF to
prevent the formation of __________ on the inside surfaces of the joint. - ANSWER-
copper oxide
a bulk cryogenic supply contains parallel-piped duplex line regulators. Which of the
following is a requirement for controls for line pressure? - ANSWER-a balanced design
