MED GAS REFRESHER EXAM 2026 PREP COVERING 250 LATEST
EXAM QUESTIONS AND CORRECT ANSWERS
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
1
,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
2
,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
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
3
, 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
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
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
4
EXAM QUESTIONS AND CORRECT ANSWERS
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
1
,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
2
,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
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
3
, 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
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
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
4
